Initial import

5 files changed, 2739 insertions, 0 deletions

diff --git a/tools/vm/.gitignore b/tools/vm/.gitignore
new file mode 100644
index 000000000..44f095fa2
--- /dev/null
+++ b/tools/vm/.gitignore
@@ -0,0 +1,2 @@
+slabinfo
+page-types
diff --git a/tools/vm/Makefile b/tools/vm/Makefile
new file mode 100644
index 000000000..93aadaf7f
--- /dev/null
+++ b/tools/vm/Makefile
@@ -0,0 +1,22 @@
+# Makefile for vm tools
+#
+TARGETS=page-types slabinfo page_owner_sort
+
+LIB_DIR = ../lib/api
+LIBS = $(LIB_DIR)/libapi.a
+
+CC = $(CROSS_COMPILE)gcc
+CFLAGS = -Wall -Wextra -I../lib/
+LDFLAGS = $(LIBS)
+
+$(TARGETS): $(LIBS)
+
+$(LIBS):
+	make -C $(LIB_DIR)
+
+%: %.c
+	$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
+
+clean:
+	$(RM) page-types slabinfo page_owner_sort
+	make -C $(LIB_DIR) clean
diff --git a/tools/vm/page-types.c b/tools/vm/page-types.c
new file mode 100644
index 000000000..8bdf16b8b
--- /dev/null
+++ b/tools/vm/page-types.c
@@ -0,0 +1,1178 @@
+/*
+ * page-types: Tool for querying page flags
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should find a copy of v2 of the GNU General Public License somewhere on
+ * your Linux system; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Copyright (C) 2009 Intel corporation
+ *
+ * Authors: Wu Fengguang <fengguang.wu@intel.com>
+ */
+
+#define _FILE_OFFSET_BITS 64
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <string.h>
+#include <getopt.h>
+#include <limits.h>
+#include <assert.h>
+#include <ftw.h>
+#include <time.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/fcntl.h>
+#include <sys/mount.h>
+#include <sys/statfs.h>
+#include <sys/mman.h>
+#include "../../include/uapi/linux/magic.h"
+#include "../../include/uapi/linux/kernel-page-flags.h"
+#include <api/fs/debugfs.h>
+
+#ifndef MAX_PATH
+# define MAX_PATH 256
+#endif
+
+#ifndef STR
+# define _STR(x) #x
+# define STR(x) _STR(x)
+#endif
+
+/*
+ * pagemap kernel ABI bits
+ */
+
+#define PM_ENTRY_BYTES      sizeof(uint64_t)
+#define PM_STATUS_BITS      3
+#define PM_STATUS_OFFSET    (64 - PM_STATUS_BITS)
+#define PM_STATUS_MASK      (((1LL << PM_STATUS_BITS) - 1) << PM_STATUS_OFFSET)
+#define PM_STATUS(nr)       (((nr) << PM_STATUS_OFFSET) & PM_STATUS_MASK)
+#define PM_PSHIFT_BITS      6
+#define PM_PSHIFT_OFFSET    (PM_STATUS_OFFSET - PM_PSHIFT_BITS)
+#define PM_PSHIFT_MASK      (((1LL << PM_PSHIFT_BITS) - 1) << PM_PSHIFT_OFFSET)
+#define __PM_PSHIFT(x)      (((uint64_t) (x) << PM_PSHIFT_OFFSET) & PM_PSHIFT_MASK)
+#define PM_PFRAME_MASK      ((1LL << PM_PSHIFT_OFFSET) - 1)
+#define PM_PFRAME(x)        ((x) & PM_PFRAME_MASK)
+
+#define __PM_SOFT_DIRTY      (1LL)
+#define PM_PRESENT          PM_STATUS(4LL)
+#define PM_SWAP             PM_STATUS(2LL)
+#define PM_SOFT_DIRTY       __PM_PSHIFT(__PM_SOFT_DIRTY)
+
+
+/*
+ * kernel page flags
+ */
+
+#define KPF_BYTES		8
+#define PROC_KPAGEFLAGS		"/proc/kpageflags"
+
+/* [32-] kernel hacking assistances */
+#define KPF_RESERVED		32
+#define KPF_MLOCKED		33
+#define KPF_MAPPEDTODISK	34
+#define KPF_PRIVATE		35
+#define KPF_PRIVATE_2		36
+#define KPF_OWNER_PRIVATE	37
+#define KPF_ARCH		38
+#define KPF_UNCACHED		39
+#define KPF_SOFTDIRTY		40
+
+/* [48-] take some arbitrary free slots for expanding overloaded flags
+ * not part of kernel API
+ */
+#define KPF_READAHEAD		48
+#define KPF_SLOB_FREE		49
+#define KPF_SLUB_FROZEN		50
+#define KPF_SLUB_DEBUG		51
+
+#define KPF_ALL_BITS		((uint64_t)~0ULL)
+#define KPF_HACKERS_BITS	(0xffffULL << 32)
+#define KPF_OVERLOADED_BITS	(0xffffULL << 48)
+#define BIT(name)		(1ULL << KPF_##name)
+#define BITS_COMPOUND		(BIT(COMPOUND_HEAD) | BIT(COMPOUND_TAIL))
+
+static const char * const page_flag_names[] = {
+	[KPF_LOCKED]		= "L:locked",
+	[KPF_ERROR]		= "E:error",
+	[KPF_REFERENCED]	= "R:referenced",
+	[KPF_UPTODATE]		= "U:uptodate",
+	[KPF_DIRTY]		= "D:dirty",
+	[KPF_LRU]		= "l:lru",
+	[KPF_ACTIVE]		= "A:active",
+	[KPF_SLAB]		= "S:slab",
+	[KPF_WRITEBACK]		= "W:writeback",
+	[KPF_RECLAIM]		= "I:reclaim",
+	[KPF_BUDDY]		= "B:buddy",
+
+	[KPF_MMAP]		= "M:mmap",
+	[KPF_ANON]		= "a:anonymous",
+	[KPF_SWAPCACHE]		= "s:swapcache",
+	[KPF_SWAPBACKED]	= "b:swapbacked",
+	[KPF_COMPOUND_HEAD]	= "H:compound_head",
+	[KPF_COMPOUND_TAIL]	= "T:compound_tail",
+	[KPF_HUGE]		= "G:huge",
+	[KPF_UNEVICTABLE]	= "u:unevictable",
+	[KPF_HWPOISON]		= "X:hwpoison",
+	[KPF_NOPAGE]		= "n:nopage",
+	[KPF_KSM]		= "x:ksm",
+	[KPF_THP]		= "t:thp",
+	[KPF_BALLOON]		= "o:balloon",
+	[KPF_ZERO_PAGE]		= "z:zero_page",
+
+	[KPF_RESERVED]		= "r:reserved",
+	[KPF_MLOCKED]		= "m:mlocked",
+	[KPF_MAPPEDTODISK]	= "d:mappedtodisk",
+	[KPF_PRIVATE]		= "P:private",
+	[KPF_PRIVATE_2]		= "p:private_2",
+	[KPF_OWNER_PRIVATE]	= "O:owner_private",
+	[KPF_ARCH]		= "h:arch",
+	[KPF_UNCACHED]		= "c:uncached",
+	[KPF_SOFTDIRTY]		= "f:softdirty",
+
+	[KPF_READAHEAD]		= "I:readahead",
+	[KPF_SLOB_FREE]		= "P:slob_free",
+	[KPF_SLUB_FROZEN]	= "A:slub_frozen",
+	[KPF_SLUB_DEBUG]	= "E:slub_debug",
+};
+
+
+static const char * const debugfs_known_mountpoints[] = {
+	"/sys/kernel/debug",
+	"/debug",
+	0,
+};
+
+/*
+ * data structures
+ */
+
+static int		opt_raw;	/* for kernel developers */
+static int		opt_list;	/* list pages (in ranges) */
+static int		opt_no_summary;	/* don't show summary */
+static pid_t		opt_pid;	/* process to walk */
+const char *		opt_file;
+
+#define MAX_ADDR_RANGES	1024
+static int		nr_addr_ranges;
+static unsigned long	opt_offset[MAX_ADDR_RANGES];
+static unsigned long	opt_size[MAX_ADDR_RANGES];
+
+#define MAX_VMAS	10240
+static int		nr_vmas;
+static unsigned long	pg_start[MAX_VMAS];
+static unsigned long	pg_end[MAX_VMAS];
+
+#define MAX_BIT_FILTERS	64
+static int		nr_bit_filters;
+static uint64_t		opt_mask[MAX_BIT_FILTERS];
+static uint64_t		opt_bits[MAX_BIT_FILTERS];
+
+static int		page_size;
+
+static int		pagemap_fd;
+static int		kpageflags_fd;
+
+static int		opt_hwpoison;
+static int		opt_unpoison;
+
+static char		*hwpoison_debug_fs;
+static int		hwpoison_inject_fd;
+static int		hwpoison_forget_fd;
+
+#define HASH_SHIFT	13
+#define HASH_SIZE	(1 << HASH_SHIFT)
+#define HASH_MASK	(HASH_SIZE - 1)
+#define HASH_KEY(flags)	(flags & HASH_MASK)
+
+static unsigned long	total_pages;
+static unsigned long	nr_pages[HASH_SIZE];
+static uint64_t		page_flags[HASH_SIZE];
+
+
+/*
+ * helper functions
+ */
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
+#define min_t(type, x, y) ({			\
+	type __min1 = (x);			\
+	type __min2 = (y);			\
+	__min1 < __min2 ? __min1 : __min2; })
+
+#define max_t(type, x, y) ({			\
+	type __max1 = (x);			\
+	type __max2 = (y);			\
+	__max1 > __max2 ? __max1 : __max2; })
+
+static unsigned long pages2mb(unsigned long pages)
+{
+	return (pages * page_size) >> 20;
+}
+
+static void fatal(const char *x, ...)
+{
+	va_list ap;
+
+	va_start(ap, x);
+	vfprintf(stderr, x, ap);
+	va_end(ap);
+	exit(EXIT_FAILURE);
+}
+
+static int checked_open(const char *pathname, int flags)
+{
+	int fd = open(pathname, flags);
+
+	if (fd < 0) {
+		perror(pathname);
+		exit(EXIT_FAILURE);
+	}
+
+	return fd;
+}
+
+/*
+ * pagemap/kpageflags routines
+ */
+
+static unsigned long do_u64_read(int fd, char *name,
+				 uint64_t *buf,
+				 unsigned long index,
+				 unsigned long count)
+{
+	long bytes;
+
+	if (index > ULONG_MAX / 8)
+		fatal("index overflow: %lu\n", index);
+
+	bytes = pread(fd, buf, count * 8, (off_t)index * 8);
+	if (bytes < 0) {
+		perror(name);
+		exit(EXIT_FAILURE);
+	}
+	if (bytes % 8)
+		fatal("partial read: %lu bytes\n", bytes);
+
+	return bytes / 8;
+}
+
+static unsigned long kpageflags_read(uint64_t *buf,
+				     unsigned long index,
+				     unsigned long pages)
+{
+	return do_u64_read(kpageflags_fd, PROC_KPAGEFLAGS, buf, index, pages);
+}
+
+static unsigned long pagemap_read(uint64_t *buf,
+				  unsigned long index,
+				  unsigned long pages)
+{
+	return do_u64_read(pagemap_fd, "/proc/pid/pagemap", buf, index, pages);
+}
+
+static unsigned long pagemap_pfn(uint64_t val)
+{
+	unsigned long pfn;
+
+	if (val & PM_PRESENT)
+		pfn = PM_PFRAME(val);
+	else
+		pfn = 0;
+
+	return pfn;
+}
+
+
+/*
+ * page flag names
+ */
+
+static char *page_flag_name(uint64_t flags)
+{
+	static char buf[65];
+	int present;
+	size_t i, j;
+
+	for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) {
+		present = (flags >> i) & 1;
+		if (!page_flag_names[i]) {
+			if (present)
+				fatal("unknown flag bit %d\n", i);
+			continue;
+		}
+		buf[j++] = present ? page_flag_names[i][0] : '_';
+	}
+
+	return buf;
+}
+
+static char *page_flag_longname(uint64_t flags)
+{
+	static char buf[1024];
+	size_t i, n;
+
+	for (i = 0, n = 0; i < ARRAY_SIZE(page_flag_names); i++) {
+		if (!page_flag_names[i])
+			continue;
+		if ((flags >> i) & 1)
+			n += snprintf(buf + n, sizeof(buf) - n, "%s,",
+					page_flag_names[i] + 2);
+	}
+	if (n)
+		n--;
+	buf[n] = '\0';
+
+	return buf;
+}
+
+
+/*
+ * page list and summary
+ */
+
+static void show_page_range(unsigned long voffset, unsigned long offset,
+			    unsigned long size, uint64_t flags)
+{
+	static uint64_t      flags0;
+	static unsigned long voff;
+	static unsigned long index;
+	static unsigned long count;
+
+	if (flags == flags0 && offset == index + count &&
+	    size && voffset == voff + count) {
+		count += size;
+		return;
+	}
+
+	if (count) {
+		if (opt_pid)
+			printf("%lx\t", voff);
+		if (opt_file)
+			printf("%lu\t", voff);
+		printf("%lx\t%lx\t%s\n",
+				index, count, page_flag_name(flags0));
+	}
+
+	flags0 = flags;
+	index  = offset;
+	voff   = voffset;
+	count  = size;
+}
+
+static void flush_page_range(void)
+{
+	show_page_range(0, 0, 0, 0);
+}
+
+static void show_page(unsigned long voffset,
+		      unsigned long offset, uint64_t flags)
+{
+	if (opt_pid)
+		printf("%lx\t", voffset);
+	if (opt_file)
+		printf("%lu\t", voffset);
+	printf("%lx\t%s\n", offset, page_flag_name(flags));
+}
+
+static void show_summary(void)
+{
+	size_t i;
+
+	printf("             flags\tpage-count       MB"
+		"  symbolic-flags\t\t\tlong-symbolic-flags\n");
+
+	for (i = 0; i < ARRAY_SIZE(nr_pages); i++) {
+		if (nr_pages[i])
+			printf("0x%016llx\t%10lu %8lu  %s\t%s\n",
+				(unsigned long long)page_flags[i],
+				nr_pages[i],
+				pages2mb(nr_pages[i]),
+				page_flag_name(page_flags[i]),
+				page_flag_longname(page_flags[i]));
+	}
+
+	printf("             total\t%10lu %8lu\n",
+			total_pages, pages2mb(total_pages));
+}
+
+
+/*
+ * page flag filters
+ */
+
+static int bit_mask_ok(uint64_t flags)
+{
+	int i;
+
+	for (i = 0; i < nr_bit_filters; i++) {
+		if (opt_bits[i] == KPF_ALL_BITS) {
+			if ((flags & opt_mask[i]) == 0)
+				return 0;
+		} else {
+			if ((flags & opt_mask[i]) != opt_bits[i])
+				return 0;
+		}
+	}
+
+	return 1;
+}
+
+static uint64_t expand_overloaded_flags(uint64_t flags, uint64_t pme)
+{
+	/* SLOB/SLUB overload several page flags */
+	if (flags & BIT(SLAB)) {
+		if (flags & BIT(PRIVATE))
+			flags ^= BIT(PRIVATE) | BIT(SLOB_FREE);
+		if (flags & BIT(ACTIVE))
+			flags ^= BIT(ACTIVE) | BIT(SLUB_FROZEN);
+		if (flags & BIT(ERROR))
+			flags ^= BIT(ERROR) | BIT(SLUB_DEBUG);
+	}
+
+	/* PG_reclaim is overloaded as PG_readahead in the read path */
+	if ((flags & (BIT(RECLAIM) | BIT(WRITEBACK))) == BIT(RECLAIM))
+		flags ^= BIT(RECLAIM) | BIT(READAHEAD);
+
+	if (pme & PM_SOFT_DIRTY)
+		flags |= BIT(SOFTDIRTY);
+
+	return flags;
+}
+
+static uint64_t well_known_flags(uint64_t flags)
+{
+	/* hide flags intended only for kernel hacker */
+	flags &= ~KPF_HACKERS_BITS;
+
+	/* hide non-hugeTLB compound pages */
+	if ((flags & BITS_COMPOUND) && !(flags & BIT(HUGE)))
+		flags &= ~BITS_COMPOUND;
+
+	return flags;
+}
+
+static uint64_t kpageflags_flags(uint64_t flags, uint64_t pme)
+{
+	if (opt_raw)
+		flags = expand_overloaded_flags(flags, pme);
+	else
+		flags = well_known_flags(flags);
+
+	return flags;
+}
+
+/*
+ * page actions
+ */
+
+static void prepare_hwpoison_fd(void)
+{
+	char buf[MAX_PATH + 1];
+
+	hwpoison_debug_fs = debugfs_mount(NULL);
+	if (!hwpoison_debug_fs) {
+		perror("mount debugfs");
+		exit(EXIT_FAILURE);
+	}
+
+	if (opt_hwpoison && !hwpoison_inject_fd) {
+		snprintf(buf, MAX_PATH, "%s/hwpoison/corrupt-pfn",
+			hwpoison_debug_fs);
+		hwpoison_inject_fd = checked_open(buf, O_WRONLY);
+	}
+
+	if (opt_unpoison && !hwpoison_forget_fd) {
+		snprintf(buf, MAX_PATH, "%s/hwpoison/unpoison-pfn",
+			hwpoison_debug_fs);
+		hwpoison_forget_fd = checked_open(buf, O_WRONLY);
+	}
+}
+
+static int hwpoison_page(unsigned long offset)
+{
+	char buf[100];
+	int len;
+
+	len = sprintf(buf, "0x%lx\n", offset);
+	len = write(hwpoison_inject_fd, buf, len);
+	if (len < 0) {
+		perror("hwpoison inject");
+		return len;
+	}
+	return 0;
+}
+
+static int unpoison_page(unsigned long offset)
+{
+	char buf[100];
+	int len;
+
+	len = sprintf(buf, "0x%lx\n", offset);
+	len = write(hwpoison_forget_fd, buf, len);
+	if (len < 0) {
+		perror("hwpoison forget");
+		return len;
+	}
+	return 0;
+}
+
+/*
+ * page frame walker
+ */
+
+static size_t hash_slot(uint64_t flags)
+{
+	size_t k = HASH_KEY(flags);
+	size_t i;
+
+	/* Explicitly reserve slot 0 for flags 0: the following logic
+	 * cannot distinguish an unoccupied slot from slot (flags==0).
+	 */
+	if (flags == 0)
+		return 0;
+
+	/* search through the remaining (HASH_SIZE-1) slots */
+	for (i = 1; i < ARRAY_SIZE(page_flags); i++, k++) {
+		if (!k || k >= ARRAY_SIZE(page_flags))
+			k = 1;
+		if (page_flags[k] == 0) {
+			page_flags[k] = flags;
+			return k;
+		}
+		if (page_flags[k] == flags)
+			return k;
+	}
+
+	fatal("hash table full: bump up HASH_SHIFT?\n");
+	exit(EXIT_FAILURE);
+}
+
+static void add_page(unsigned long voffset,
+		     unsigned long offset, uint64_t flags, uint64_t pme)
+{
+	flags = kpageflags_flags(flags, pme);
+
+	if (!bit_mask_ok(flags))
+		return;
+
+	if (opt_hwpoison)
+		hwpoison_page(offset);
+	if (opt_unpoison)
+		unpoison_page(offset);
+
+	if (opt_list == 1)
+		show_page_range(voffset, offset, 1, flags);
+	else if (opt_list == 2)
+		show_page(voffset, offset, flags);
+
+	nr_pages[hash_slot(flags)]++;
+	total_pages++;
+}
+
+#define KPAGEFLAGS_BATCH	(64 << 10)	/* 64k pages */
+static void walk_pfn(unsigned long voffset,
+		     unsigned long index,
+		     unsigned long count,
+		     uint64_t pme)
+{
+	uint64_t buf[KPAGEFLAGS_BATCH];
+	unsigned long batch;
+	unsigned long pages;
+	unsigned long i;
+
+	while (count) {
+		batch = min_t(unsigned long, count, KPAGEFLAGS_BATCH);
+		pages = kpageflags_read(buf, index, batch);
+		if (pages == 0)
+			break;
+
+		for (i = 0; i < pages; i++)
+			add_page(voffset + i, index + i, buf[i], pme);
+
+		index += pages;
+		count -= pages;
+	}
+}
+
+#define PAGEMAP_BATCH	(64 << 10)
+static void walk_vma(unsigned long index, unsigned long count)
+{
+	uint64_t buf[PAGEMAP_BATCH];
+	unsigned long batch;
+	unsigned long pages;
+	unsigned long pfn;
+	unsigned long i;
+
+	while (count) {
+		batch = min_t(unsigned long, count, PAGEMAP_BATCH);
+		pages = pagemap_read(buf, index, batch);
+		if (pages == 0)
+			break;
+
+		for (i = 0; i < pages; i++) {
+			pfn = pagemap_pfn(buf[i]);
+			if (pfn)
+				walk_pfn(index + i, pfn, 1, buf[i]);
+		}
+
+		index += pages;
+		count -= pages;
+	}
+}
+
+static void walk_task(unsigned long index, unsigned long count)
+{
+	const unsigned long end = index + count;
+	unsigned long start;
+	int i = 0;
+
+	while (index < end) {
+
+		while (pg_end[i] <= index)
+			if (++i >= nr_vmas)
+				return;
+		if (pg_start[i] >= end)
+			return;
+
+		start = max_t(unsigned long, pg_start[i], index);
+		index = min_t(unsigned long, pg_end[i], end);
+
+		assert(start < index);
+		walk_vma(start, index - start);
+	}
+}
+
+static void add_addr_range(unsigned long offset, unsigned long size)
+{
+	if (nr_addr_ranges >= MAX_ADDR_RANGES)
+		fatal("too many addr ranges\n");
+
+	opt_offset[nr_addr_ranges] = offset;
+	opt_size[nr_addr_ranges] = min_t(unsigned long, size, ULONG_MAX-offset);
+	nr_addr_ranges++;
+}
+
+static void walk_addr_ranges(void)
+{
+	int i;
+
+	kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY);
+
+	if (!nr_addr_ranges)
+		add_addr_range(0, ULONG_MAX);
+
+	for (i = 0; i < nr_addr_ranges; i++)
+		if (!opt_pid)
+			walk_pfn(opt_offset[i], opt_offset[i], opt_size[i], 0);
+		else
+			walk_task(opt_offset[i], opt_size[i]);
+
+	close(kpageflags_fd);
+}
+
+
+/*
+ * user interface
+ */
+
+static const char *page_flag_type(uint64_t flag)
+{
+	if (flag & KPF_HACKERS_BITS)
+		return "(r)";
+	if (flag & KPF_OVERLOADED_BITS)
+		return "(o)";
+	return "   ";
+}
+
+static void usage(void)
+{
+	size_t i, j;
+
+	printf(
+"page-types [options]\n"
+"            -r|--raw                   Raw mode, for kernel developers\n"
+"            -d|--describe flags        Describe flags\n"
+"            -a|--addr    addr-spec     Walk a range of pages\n"
+"            -b|--bits    bits-spec     Walk pages with specified bits\n"
+"            -p|--pid     pid           Walk process address space\n"
+"            -f|--file    filename      Walk file address space\n"
+"            -l|--list                  Show page details in ranges\n"
+"            -L|--list-each             Show page details one by one\n"
+"            -N|--no-summary            Don't show summary info\n"
+"            -X|--hwpoison              hwpoison pages\n"
+"            -x|--unpoison              unpoison pages\n"
+"            -h|--help                  Show this usage message\n"
+"flags:\n"
+"            0x10                       bitfield format, e.g.\n"
+"            anon                       bit-name, e.g.\n"
+"            0x10,anon                  comma-separated list, e.g.\n"
+"addr-spec:\n"
+"            N                          one page at offset N (unit: pages)\n"
+"            N+M                        pages range from N to N+M-1\n"
+"            N,M                        pages range from N to M-1\n"
+"            N,                         pages range from N to end\n"
+"            ,M                         pages range from 0 to M-1\n"
+"bits-spec:\n"
+"            bit1,bit2                  (flags & (bit1|bit2)) != 0\n"
+"            bit1,bit2=bit1             (flags & (bit1|bit2)) == bit1\n"
+"            bit1,~bit2                 (flags & (bit1|bit2)) == bit1\n"
+"            =bit1,bit2                 flags == (bit1|bit2)\n"
+"bit-names:\n"
+	);
+
+	for (i = 0, j = 0; i < ARRAY_SIZE(page_flag_names); i++) {
+		if (!page_flag_names[i])
+			continue;
+		printf("%16s%s", page_flag_names[i] + 2,
+				 page_flag_type(1ULL << i));
+		if (++j > 3) {
+			j = 0;
+			putchar('\n');
+		}
+	}
+	printf("\n                                   "
+		"(r) raw mode bits  (o) overloaded bits\n");
+}
+
+static unsigned long long parse_number(const char *str)
+{
+	unsigned long long n;
+
+	n = strtoll(str, NULL, 0);
+
+	if (n == 0 && str[0] != '0')
+		fatal("invalid name or number: %s\n", str);
+
+	return n;
+}
+
+static void parse_pid(const char *str)
+{
+	FILE *file;
+	char buf[5000];
+
+	opt_pid = parse_number(str);
+
+	sprintf(buf, "/proc/%d/pagemap", opt_pid);
+	pagemap_fd = checked_open(buf, O_RDONLY);
+
+	sprintf(buf, "/proc/%d/maps", opt_pid);
+	file = fopen(buf, "r");
+	if (!file) {
+		perror(buf);
+		exit(EXIT_FAILURE);
+	}
+
+	while (fgets(buf, sizeof(buf), file) != NULL) {
+		unsigned long vm_start;
+		unsigned long vm_end;
+		unsigned long long pgoff;
+		int major, minor;
+		char r, w, x, s;
+		unsigned long ino;
+		int n;
+
+		n = sscanf(buf, "%lx-%lx %c%c%c%c %llx %x:%x %lu",
+			   &vm_start,
+			   &vm_end,
+			   &r, &w, &x, &s,
+			   &pgoff,
+			   &major, &minor,
+			   &ino);
+		if (n < 10) {
+			fprintf(stderr, "unexpected line: %s\n", buf);
+			continue;
+		}
+		pg_start[nr_vmas] = vm_start / page_size;
+		pg_end[nr_vmas] = vm_end / page_size;
+		if (++nr_vmas >= MAX_VMAS) {
+			fprintf(stderr, "too many VMAs\n");
+			break;
+		}
+	}
+	fclose(file);
+}
+
+static void show_file(const char *name, const struct stat *st)
+{
+	unsigned long long size = st->st_size;
+	char atime[64], mtime[64];
+	long now = time(NULL);
+
+	printf("%s\tInode: %u\tSize: %llu (%llu pages)\n",
+			name, (unsigned)st->st_ino,
+			size, (size + page_size - 1) / page_size);
+
+	strftime(atime, sizeof(atime), "%c", localtime(&st->st_atime));
+	strftime(mtime, sizeof(mtime), "%c", localtime(&st->st_mtime));
+
+	printf("Modify: %s (%ld seconds ago)\nAccess: %s (%ld seconds ago)\n",
+			mtime, now - st->st_mtime,
+			atime, now - st->st_atime);
+}
+
+static sigjmp_buf sigbus_jmp;
+
+static void * volatile sigbus_addr;
+
+static void sigbus_handler(int sig, siginfo_t *info, void *ucontex)
+{
+	(void)sig;
+	(void)ucontex;
+	sigbus_addr = info ? info->si_addr : NULL;
+	siglongjmp(sigbus_jmp, 1);
+}
+
+static struct sigaction sigbus_action = {
+	.sa_sigaction = sigbus_handler,
+	.sa_flags = SA_SIGINFO,
+};
+
+static void walk_file(const char *name, const struct stat *st)
+{
+	uint8_t vec[PAGEMAP_BATCH];
+	uint64_t buf[PAGEMAP_BATCH], flags;
+	unsigned long nr_pages, pfn, i;
+	off_t off, end = st->st_size;
+	int fd;
+	ssize_t len;
+	void *ptr;
+	int first = 1;
+
+	fd = checked_open(name, O_RDONLY|O_NOATIME|O_NOFOLLOW);
+
+	for (off = 0; off < end; off += len) {
+		nr_pages = (end - off + page_size - 1) / page_size;
+		if (nr_pages > PAGEMAP_BATCH)
+			nr_pages = PAGEMAP_BATCH;
+		len = nr_pages * page_size;
+
+		ptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, off);
+		if (ptr == MAP_FAILED)
+			fatal("mmap failed: %s", name);
+
+		/* determine cached pages */
+		if (mincore(ptr, len, vec))
+			fatal("mincore failed: %s", name);
+
+		/* turn off readahead */
+		if (madvise(ptr, len, MADV_RANDOM))
+			fatal("madvice failed: %s", name);
+
+		if (sigsetjmp(sigbus_jmp, 1)) {
+			end = off + sigbus_addr ? sigbus_addr - ptr : 0;
+			fprintf(stderr, "got sigbus at offset %lld: %s\n",
+					(long long)end, name);
+			goto got_sigbus;
+		}
+
+		/* populate ptes */
+		for (i = 0; i < nr_pages ; i++) {
+			if (vec[i] & 1)
+				(void)*(volatile int *)(ptr + i * page_size);
+		}
+got_sigbus:
+
+		/* turn off harvesting reference bits */
+		if (madvise(ptr, len, MADV_SEQUENTIAL))
+			fatal("madvice failed: %s", name);
+
+		if (pagemap_read(buf, (unsigned long)ptr / page_size,
+					nr_pages) != nr_pages)
+			fatal("cannot read pagemap");
+
+		munmap(ptr, len);
+
+		for (i = 0; i < nr_pages; i++) {
+			pfn = pagemap_pfn(buf[i]);
+			if (!pfn)
+				continue;
+			if (!kpageflags_read(&flags, pfn, 1))
+				continue;
+			if (first && opt_list) {
+				first = 0;
+				flush_page_range();
+				show_file(name, st);
+			}
+			add_page(off / page_size + i, pfn, flags, buf[i]);
+		}
+	}
+
+	close(fd);
+}
+
+int walk_tree(const char *name, const struct stat *st, int type, struct FTW *f)
+{
+	(void)f;
+	switch (type) {
+	case FTW_F:
+		if (S_ISREG(st->st_mode))
+			walk_file(name, st);
+		break;
+	case FTW_DNR:
+		fprintf(stderr, "cannot read dir: %s\n", name);
+		break;
+	}
+	return 0;
+}
+
+static void walk_page_cache(void)
+{
+	struct stat st;
+
+	kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY);
+	pagemap_fd = checked_open("/proc/self/pagemap", O_RDONLY);
+	sigaction(SIGBUS, &sigbus_action, NULL);
+
+	if (stat(opt_file, &st))
+		fatal("stat failed: %s\n", opt_file);
+
+	if (S_ISREG(st.st_mode)) {
+		walk_file(opt_file, &st);
+	} else if (S_ISDIR(st.st_mode)) {
+		/* do not follow symlinks and mountpoints */
+		if (nftw(opt_file, walk_tree, 64, FTW_MOUNT | FTW_PHYS) < 0)
+			fatal("nftw failed: %s\n", opt_file);
+	} else
+		fatal("unhandled file type: %s\n", opt_file);
+
+	close(kpageflags_fd);
+	close(pagemap_fd);
+	signal(SIGBUS, SIG_DFL);
+}
+
+static void parse_file(const char *name)
+{
+	opt_file = name;
+}
+
+static void parse_addr_range(const char *optarg)
+{
+	unsigned long offset;
+	unsigned long size;
+	char *p;
+
+	p = strchr(optarg, ',');
+	if (!p)
+		p = strchr(optarg, '+');
+
+	if (p == optarg) {
+		offset = 0;
+		size   = parse_number(p + 1);
+	} else if (p) {
+		offset = parse_number(optarg);
+		if (p[1] == '\0')
+			size = ULONG_MAX;
+		else {
+			size = parse_number(p + 1);
+			if (*p == ',') {
+				if (size < offset)
+					fatal("invalid range: %lu,%lu\n",
+							offset, size);
+				size -= offset;
+			}
+		}
+	} else {
+		offset = parse_number(optarg);
+		size   = 1;
+	}
+
+	add_addr_range(offset, size);
+}
+
+static void add_bits_filter(uint64_t mask, uint64_t bits)
+{
+	if (nr_bit_filters >= MAX_BIT_FILTERS)
+		fatal("too much bit filters\n");
+
+	opt_mask[nr_bit_filters] = mask;
+	opt_bits[nr_bit_filters] = bits;
+	nr_bit_filters++;
+}
+
+static uint64_t parse_flag_name(const char *str, int len)
+{
+	size_t i;
+
+	if (!*str || !len)
+		return 0;
+
+	if (len <= 8 && !strncmp(str, "compound", len))
+		return BITS_COMPOUND;
+
+	for (i = 0; i < ARRAY_SIZE(page_flag_names); i++) {
+		if (!page_flag_names[i])
+			continue;
+		if (!strncmp(str, page_flag_names[i] + 2, len))
+			return 1ULL << i;
+	}
+
+	return parse_number(str);
+}
+
+static uint64_t parse_flag_names(const char *str, int all)
+{
+	const char *p    = str;
+	uint64_t   flags = 0;
+
+	while (1) {
+		if (*p == ',' || *p == '=' || *p == '\0') {
+			if ((*str != '~') || (*str == '~' && all && *++str))
+				flags |= parse_flag_name(str, p - str);
+			if (*p != ',')
+				break;
+			str = p + 1;
+		}
+		p++;
+	}
+
+	return flags;
+}
+
+static void parse_bits_mask(const char *optarg)
+{
+	uint64_t mask;
+	uint64_t bits;
+	const char *p;
+
+	p = strchr(optarg, '=');
+	if (p == optarg) {
+		mask = KPF_ALL_BITS;
+		bits = parse_flag_names(p + 1, 0);
+	} else if (p) {
+		mask = parse_flag_names(optarg, 0);
+		bits = parse_flag_names(p + 1, 0);
+	} else if (strchr(optarg, '~')) {
+		mask = parse_flag_names(optarg, 1);
+		bits = parse_flag_names(optarg, 0);
+	} else {
+		mask = parse_flag_names(optarg, 0);
+		bits = KPF_ALL_BITS;
+	}
+
+	add_bits_filter(mask, bits);
+}
+
+static void describe_flags(const char *optarg)
+{
+	uint64_t flags = parse_flag_names(optarg, 0);
+
+	printf("0x%016llx\t%s\t%s\n",
+		(unsigned long long)flags,
+		page_flag_name(flags),
+		page_flag_longname(flags));
+}
+
+static const struct option opts[] = {
+	{ "raw"       , 0, NULL, 'r' },
+	{ "pid"       , 1, NULL, 'p' },
+	{ "file"      , 1, NULL, 'f' },
+	{ "addr"      , 1, NULL, 'a' },
+	{ "bits"      , 1, NULL, 'b' },
+	{ "describe"  , 1, NULL, 'd' },
+	{ "list"      , 0, NULL, 'l' },
+	{ "list-each" , 0, NULL, 'L' },
+	{ "no-summary", 0, NULL, 'N' },
+	{ "hwpoison"  , 0, NULL, 'X' },
+	{ "unpoison"  , 0, NULL, 'x' },
+	{ "help"      , 0, NULL, 'h' },
+	{ NULL        , 0, NULL, 0 }
+};
+
+int main(int argc, char *argv[])
+{
+	int c;
+
+	page_size = getpagesize();
+
+	while ((c = getopt_long(argc, argv,
+				"rp:f:a:b:d:lLNXxh", opts, NULL)) != -1) {
+		switch (c) {
+		case 'r':
+			opt_raw = 1;
+			break;
+		case 'p':
+			parse_pid(optarg);
+			break;
+		case 'f':
+			parse_file(optarg);
+			break;
+		case 'a':
+			parse_addr_range(optarg);
+			break;
+		case 'b':
+			parse_bits_mask(optarg);
+			break;
+		case 'd':
+			describe_flags(optarg);
+			exit(0);
+		case 'l':
+			opt_list = 1;
+			break;
+		case 'L':
+			opt_list = 2;
+			break;
+		case 'N':
+			opt_no_summary = 1;
+			break;
+		case 'X':
+			opt_hwpoison = 1;
+			prepare_hwpoison_fd();
+			break;
+		case 'x':
+			opt_unpoison = 1;
+			prepare_hwpoison_fd();
+			break;
+		case 'h':
+			usage();
+			exit(0);
+		default:
+			usage();
+			exit(1);
+		}
+	}
+
+	if (opt_list && opt_pid)
+		printf("voffset\t");
+	if (opt_list && opt_file)
+		printf("foffset\t");
+	if (opt_list == 1)
+		printf("offset\tlen\tflags\n");
+	if (opt_list == 2)
+		printf("offset\tflags\n");
+
+	if (opt_file)
+		walk_page_cache();
+	else
+		walk_addr_ranges();
+
+	if (opt_list == 1)
+		flush_page_range();
+
+	if (opt_no_summary)
+		return 0;
+
+	if (opt_list)
+		printf("\n\n");
+
+	show_summary();
+
+	return 0;
+}
diff --git a/tools/vm/page_owner_sort.c b/tools/vm/page_owner_sort.c
new file mode 100644
index 000000000..77147b42d
--- /dev/null
+++ b/tools/vm/page_owner_sort.c
@@ -0,0 +1,144 @@
+/*
+ * User-space helper to sort the output of /sys/kernel/debug/page_owner
+ *
+ * Example use:
+ * cat /sys/kernel/debug/page_owner > page_owner_full.txt
+ * grep -v ^PFN page_owner_full.txt > page_owner.txt
+ * ./sort page_owner.txt sorted_page_owner.txt
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+
+struct block_list {
+	char *txt;
+	int len;
+	int num;
+};
+
+
+static struct block_list *list;
+static int list_size;
+static int max_size;
+
+struct block_list *block_head;
+
+int read_block(char *buf, int buf_size, FILE *fin)
+{
+	char *curr = buf, *const buf_end = buf + buf_size;
+
+	while (buf_end - curr > 1 && fgets(curr, buf_end - curr, fin)) {
+		if (*curr == '\n') /* empty line */
+			return curr - buf;
+		curr += strlen(curr);
+	}
+
+	return -1; /* EOF or no space left in buf. */
+}
+
+static int compare_txt(const void *p1, const void *p2)
+{
+	const struct block_list *l1 = p1, *l2 = p2;
+
+	return strcmp(l1->txt, l2->txt);
+}
+
+static int compare_num(const void *p1, const void *p2)
+{
+	const struct block_list *l1 = p1, *l2 = p2;
+
+	return l2->num - l1->num;
+}
+
+static void add_list(char *buf, int len)
+{
+	if (list_size != 0 &&
+	    len == list[list_size-1].len &&
+	    memcmp(buf, list[list_size-1].txt, len) == 0) {
+		list[list_size-1].num++;
+		return;
+	}
+	if (list_size == max_size) {
+		printf("max_size too small??\n");
+		exit(1);
+	}
+	list[list_size].txt = malloc(len+1);
+	list[list_size].len = len;
+	list[list_size].num = 1;
+	memcpy(list[list_size].txt, buf, len);
+	list[list_size].txt[len] = 0;
+	list_size++;
+	if (list_size % 1000 == 0) {
+		printf("loaded %d\r", list_size);
+		fflush(stdout);
+	}
+}
+
+#define BUF_SIZE	1024
+
+int main(int argc, char **argv)
+{
+	FILE *fin, *fout;
+	char buf[BUF_SIZE];
+	int ret, i, count;
+	struct block_list *list2;
+	struct stat st;
+
+	if (argc < 3) {
+		printf("Usage: ./program <input> <output>\n");
+		perror("open: ");
+		exit(1);
+	}
+
+	fin = fopen(argv[1], "r");
+	fout = fopen(argv[2], "w");
+	if (!fin || !fout) {
+		printf("Usage: ./program <input> <output>\n");
+		perror("open: ");
+		exit(1);
+	}
+
+	fstat(fileno(fin), &st);
+	max_size = st.st_size / 100; /* hack ... */
+
+	list = malloc(max_size * sizeof(*list));
+
+	for ( ; ; ) {
+		ret = read_block(buf, BUF_SIZE, fin);
+		if (ret < 0)
+			break;
+
+		add_list(buf, ret);
+	}
+
+	printf("loaded %d\n", list_size);
+
+	printf("sorting ....\n");
+
+	qsort(list, list_size, sizeof(list[0]), compare_txt);
+
+	list2 = malloc(sizeof(*list) * list_size);
+
+	printf("culling\n");
+
+	for (i = count = 0; i < list_size; i++) {
+		if (count == 0 ||
+		    strcmp(list2[count-1].txt, list[i].txt) != 0) {
+			list2[count++] = list[i];
+		} else {
+			list2[count-1].num += list[i].num;
+		}
+	}
+
+	qsort(list2, count, sizeof(list[0]), compare_num);
+
+	for (i = 0; i < count; i++)
+		fprintf(fout, "%d times:\n%s\n", list2[i].num, list2[i].txt);
+
+	return 0;
+}
diff --git a/tools/vm/slabinfo.c b/tools/vm/slabinfo.c
new file mode 100644
index 000000000..808d5a9d5
--- /dev/null
+++ b/tools/vm/slabinfo.c
@@ -0,0 +1,1393 @@
+/*
+ * Slabinfo: Tool to get reports about slabs
+ *
+ * (C) 2007 sgi, Christoph Lameter
+ * (C) 2011 Linux Foundation, Christoph Lameter
+ *
+ * Compile with:
+ *
+ * gcc -o slabinfo slabinfo.c
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <strings.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <getopt.h>
+#include <regex.h>
+#include <errno.h>
+
+#define MAX_SLABS 500
+#define MAX_ALIASES 500
+#define MAX_NODES 1024
+
+struct slabinfo {
+	char *name;
+	int alias;
+	int refs;
+	int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
+	int hwcache_align, object_size, objs_per_slab;
+	int sanity_checks, slab_size, store_user, trace;
+	int order, poison, reclaim_account, red_zone;
+	unsigned long partial, objects, slabs, objects_partial, objects_total;
+	unsigned long alloc_fastpath, alloc_slowpath;
+	unsigned long free_fastpath, free_slowpath;
+	unsigned long free_frozen, free_add_partial, free_remove_partial;
+	unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
+	unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
+	unsigned long deactivate_to_head, deactivate_to_tail;
+	unsigned long deactivate_remote_frees, order_fallback;
+	unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;
+	unsigned long alloc_node_mismatch, deactivate_bypass;
+	unsigned long cpu_partial_alloc, cpu_partial_free;
+	int numa[MAX_NODES];
+	int numa_partial[MAX_NODES];
+} slabinfo[MAX_SLABS];
+
+struct aliasinfo {
+	char *name;
+	char *ref;
+	struct slabinfo *slab;
+} aliasinfo[MAX_ALIASES];
+
+int slabs = 0;
+int actual_slabs = 0;
+int aliases = 0;
+int alias_targets = 0;
+int highest_node = 0;
+
+char buffer[4096];
+
+int show_empty = 0;
+int show_report = 0;
+int show_alias = 0;
+int show_slab = 0;
+int skip_zero = 1;
+int show_numa = 0;
+int show_track = 0;
+int show_first_alias = 0;
+int validate = 0;
+int shrink = 0;
+int show_inverted = 0;
+int show_single_ref = 0;
+int show_totals = 0;
+int sort_size = 0;
+int sort_active = 0;
+int set_debug = 0;
+int show_ops = 0;
+int show_activity = 0;
+
+/* Debug options */
+int sanity = 0;
+int redzone = 0;
+int poison = 0;
+int tracking = 0;
+int tracing = 0;
+
+int page_size;
+
+regex_t pattern;
+
+static void fatal(const char *x, ...)
+{
+	va_list ap;
+
+	va_start(ap, x);
+	vfprintf(stderr, x, ap);
+	va_end(ap);
+	exit(EXIT_FAILURE);
+}
+
+static void usage(void)
+{
+	printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
+		"slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
+		"-a|--aliases           Show aliases\n"
+		"-A|--activity          Most active slabs first\n"
+		"-d<options>|--debug=<options> Set/Clear Debug options\n"
+		"-D|--display-active    Switch line format to activity\n"
+		"-e|--empty             Show empty slabs\n"
+		"-f|--first-alias       Show first alias\n"
+		"-h|--help              Show usage information\n"
+		"-i|--inverted          Inverted list\n"
+		"-l|--slabs             Show slabs\n"
+		"-n|--numa              Show NUMA information\n"
+		"-o|--ops		Show kmem_cache_ops\n"
+		"-s|--shrink            Shrink slabs\n"
+		"-r|--report		Detailed report on single slabs\n"
+		"-S|--Size              Sort by size\n"
+		"-t|--tracking          Show alloc/free information\n"
+		"-T|--Totals            Show summary information\n"
+		"-v|--validate          Validate slabs\n"
+		"-z|--zero              Include empty slabs\n"
+		"-1|--1ref              Single reference\n"
+		"\nValid debug options (FZPUT may be combined)\n"
+		"a / A          Switch on all debug options (=FZUP)\n"
+		"-              Switch off all debug options\n"
+		"f / F          Sanity Checks (SLAB_DEBUG_FREE)\n"
+		"z / Z          Redzoning\n"
+		"p / P          Poisoning\n"
+		"u / U          Tracking\n"
+		"t / T          Tracing\n"
+	);
+}
+
+static unsigned long read_obj(const char *name)
+{
+	FILE *f = fopen(name, "r");
+
+	if (!f)
+		buffer[0] = 0;
+	else {
+		if (!fgets(buffer, sizeof(buffer), f))
+			buffer[0] = 0;
+		fclose(f);
+		if (buffer[strlen(buffer)] == '\n')
+			buffer[strlen(buffer)] = 0;
+	}
+	return strlen(buffer);
+}
+
+
+/*
+ * Get the contents of an attribute
+ */
+static unsigned long get_obj(const char *name)
+{
+	if (!read_obj(name))
+		return 0;
+
+	return atol(buffer);
+}
+
+static unsigned long get_obj_and_str(const char *name, char **x)
+{
+	unsigned long result = 0;
+	char *p;
+
+	*x = NULL;
+
+	if (!read_obj(name)) {
+		x = NULL;
+		return 0;
+	}
+	result = strtoul(buffer, &p, 10);
+	while (*p == ' ')
+		p++;
+	if (*p)
+		*x = strdup(p);
+	return result;
+}
+
+static void set_obj(struct slabinfo *s, const char *name, int n)
+{
+	char x[100];
+	FILE *f;
+
+	snprintf(x, 100, "%s/%s", s->name, name);
+	f = fopen(x, "w");
+	if (!f)
+		fatal("Cannot write to %s\n", x);
+
+	fprintf(f, "%d\n", n);
+	fclose(f);
+}
+
+static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
+{
+	char x[100];
+	FILE *f;
+	size_t l;
+
+	snprintf(x, 100, "%s/%s", s->name, name);
+	f = fopen(x, "r");
+	if (!f) {
+		buffer[0] = 0;
+		l = 0;
+	} else {
+		l = fread(buffer, 1, sizeof(buffer), f);
+		buffer[l] = 0;
+		fclose(f);
+	}
+	return l;
+}
+
+
+/*
+ * Put a size string together
+ */
+static int store_size(char *buffer, unsigned long value)
+{
+	unsigned long divisor = 1;
+	char trailer = 0;
+	int n;
+
+	if (value > 1000000000UL) {
+		divisor = 100000000UL;
+		trailer = 'G';
+	} else if (value > 1000000UL) {
+		divisor = 100000UL;
+		trailer = 'M';
+	} else if (value > 1000UL) {
+		divisor = 100;
+		trailer = 'K';
+	}
+
+	value /= divisor;
+	n = sprintf(buffer, "%ld",value);
+	if (trailer) {
+		buffer[n] = trailer;
+		n++;
+		buffer[n] = 0;
+	}
+	if (divisor != 1) {
+		memmove(buffer + n - 2, buffer + n - 3, 4);
+		buffer[n-2] = '.';
+		n++;
+	}
+	return n;
+}
+
+static void decode_numa_list(int *numa, char *t)
+{
+	int node;
+	int nr;
+
+	memset(numa, 0, MAX_NODES * sizeof(int));
+
+	if (!t)
+		return;
+
+	while (*t == 'N') {
+		t++;
+		node = strtoul(t, &t, 10);
+		if (*t == '=') {
+			t++;
+			nr = strtoul(t, &t, 10);
+			numa[node] = nr;
+			if (node > highest_node)
+				highest_node = node;
+		}
+		while (*t == ' ')
+			t++;
+	}
+}
+
+static void slab_validate(struct slabinfo *s)
+{
+	if (strcmp(s->name, "*") == 0)
+		return;
+
+	set_obj(s, "validate", 1);
+}
+
+static void slab_shrink(struct slabinfo *s)
+{
+	if (strcmp(s->name, "*") == 0)
+		return;
+
+	set_obj(s, "shrink", 1);
+}
+
+int line = 0;
+
+static void first_line(void)
+{
+	if (show_activity)
+		printf("Name                   Objects      Alloc       Free   %%Fast Fallb O CmpX   UL\n");
+	else
+		printf("Name                   Objects Objsize    Space "
+			"Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n");
+}
+
+/*
+ * Find the shortest alias of a slab
+ */
+static struct aliasinfo *find_one_alias(struct slabinfo *find)
+{
+	struct aliasinfo *a;
+	struct aliasinfo *best = NULL;
+
+	for(a = aliasinfo;a < aliasinfo + aliases; a++) {
+		if (a->slab == find &&
+			(!best || strlen(best->name) < strlen(a->name))) {
+				best = a;
+				if (strncmp(a->name,"kmall", 5) == 0)
+					return best;
+			}
+	}
+	return best;
+}
+
+static unsigned long slab_size(struct slabinfo *s)
+{
+	return 	s->slabs * (page_size << s->order);
+}
+
+static unsigned long slab_activity(struct slabinfo *s)
+{
+	return 	s->alloc_fastpath + s->free_fastpath +
+		s->alloc_slowpath + s->free_slowpath;
+}
+
+static void slab_numa(struct slabinfo *s, int mode)
+{
+	int node;
+
+	if (strcmp(s->name, "*") == 0)
+		return;
+
+	if (!highest_node) {
+		printf("\n%s: No NUMA information available.\n", s->name);
+		return;
+	}
+
+	if (skip_zero && !s->slabs)
+		return;
+
+	if (!line) {
+		printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
+		for(node = 0; node <= highest_node; node++)
+			printf(" %4d", node);
+		printf("\n----------------------");
+		for(node = 0; node <= highest_node; node++)
+			printf("-----");
+		printf("\n");
+	}
+	printf("%-21s ", mode ? "All slabs" : s->name);
+	for(node = 0; node <= highest_node; node++) {
+		char b[20];
+
+		store_size(b, s->numa[node]);
+		printf(" %4s", b);
+	}
+	printf("\n");
+	if (mode) {
+		printf("%-21s ", "Partial slabs");
+		for(node = 0; node <= highest_node; node++) {
+			char b[20];
+
+			store_size(b, s->numa_partial[node]);
+			printf(" %4s", b);
+		}
+		printf("\n");
+	}
+	line++;
+}
+
+static void show_tracking(struct slabinfo *s)
+{
+	printf("\n%s: Kernel object allocation\n", s->name);
+	printf("-----------------------------------------------------------------------\n");
+	if (read_slab_obj(s, "alloc_calls"))
+		printf("%s", buffer);
+	else
+		printf("No Data\n");
+
+	printf("\n%s: Kernel object freeing\n", s->name);
+	printf("------------------------------------------------------------------------\n");
+	if (read_slab_obj(s, "free_calls"))
+		printf("%s", buffer);
+	else
+		printf("No Data\n");
+
+}
+
+static void ops(struct slabinfo *s)
+{
+	if (strcmp(s->name, "*") == 0)
+		return;
+
+	if (read_slab_obj(s, "ops")) {
+		printf("\n%s: kmem_cache operations\n", s->name);
+		printf("--------------------------------------------\n");
+		printf("%s", buffer);
+	} else
+		printf("\n%s has no kmem_cache operations\n", s->name);
+}
+
+static const char *onoff(int x)
+{
+	if (x)
+		return "On ";
+	return "Off";
+}
+
+static void slab_stats(struct slabinfo *s)
+{
+	unsigned long total_alloc;
+	unsigned long total_free;
+	unsigned long total;
+
+	if (!s->alloc_slab)
+		return;
+
+	total_alloc = s->alloc_fastpath + s->alloc_slowpath;
+	total_free = s->free_fastpath + s->free_slowpath;
+
+	if (!total_alloc)
+		return;
+
+	printf("\n");
+	printf("Slab Perf Counter       Alloc     Free %%Al %%Fr\n");
+	printf("--------------------------------------------------\n");
+	printf("Fastpath             %8lu %8lu %3lu %3lu\n",
+		s->alloc_fastpath, s->free_fastpath,
+		s->alloc_fastpath * 100 / total_alloc,
+		total_free ? s->free_fastpath * 100 / total_free : 0);
+	printf("Slowpath             %8lu %8lu %3lu %3lu\n",
+		total_alloc - s->alloc_fastpath, s->free_slowpath,
+		(total_alloc - s->alloc_fastpath) * 100 / total_alloc,
+		total_free ? s->free_slowpath * 100 / total_free : 0);
+	printf("Page Alloc           %8lu %8lu %3lu %3lu\n",
+		s->alloc_slab, s->free_slab,
+		s->alloc_slab * 100 / total_alloc,
+		total_free ? s->free_slab * 100 / total_free : 0);
+	printf("Add partial          %8lu %8lu %3lu %3lu\n",
+		s->deactivate_to_head + s->deactivate_to_tail,
+		s->free_add_partial,
+		(s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
+		total_free ? s->free_add_partial * 100 / total_free : 0);
+	printf("Remove partial       %8lu %8lu %3lu %3lu\n",
+		s->alloc_from_partial, s->free_remove_partial,
+		s->alloc_from_partial * 100 / total_alloc,
+		total_free ? s->free_remove_partial * 100 / total_free : 0);
+
+	printf("Cpu partial list     %8lu %8lu %3lu %3lu\n",
+		s->cpu_partial_alloc, s->cpu_partial_free,
+		s->cpu_partial_alloc * 100 / total_alloc,
+		total_free ? s->cpu_partial_free * 100 / total_free : 0);
+
+	printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
+		s->deactivate_remote_frees, s->free_frozen,
+		s->deactivate_remote_frees * 100 / total_alloc,
+		total_free ? s->free_frozen * 100 / total_free : 0);
+
+	printf("Total                %8lu %8lu\n\n", total_alloc, total_free);
+
+	if (s->cpuslab_flush)
+		printf("Flushes %8lu\n", s->cpuslab_flush);
+
+	total = s->deactivate_full + s->deactivate_empty +
+			s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
+
+	if (total) {
+		printf("\nSlab Deactivation             Ocurrences  %%\n");
+		printf("-------------------------------------------------\n");
+		printf("Slab full                     %7lu  %3lu%%\n",
+			s->deactivate_full, (s->deactivate_full * 100) / total);
+		printf("Slab empty                    %7lu  %3lu%%\n",
+			s->deactivate_empty, (s->deactivate_empty * 100) / total);
+		printf("Moved to head of partial list %7lu  %3lu%%\n",
+			s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
+		printf("Moved to tail of partial list %7lu  %3lu%%\n",
+			s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
+		printf("Deactivation bypass           %7lu  %3lu%%\n",
+			s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
+		printf("Refilled from foreign frees   %7lu  %3lu%%\n",
+			s->alloc_refill, (s->alloc_refill * 100) / total);
+		printf("Node mismatch                 %7lu  %3lu%%\n",
+			s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
+	}
+
+	if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail)
+		printf("\nCmpxchg_double Looping\n------------------------\n");
+		printf("Locked Cmpxchg Double redos   %lu\nUnlocked Cmpxchg Double redos %lu\n",
+			s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
+}
+
+static void report(struct slabinfo *s)
+{
+	if (strcmp(s->name, "*") == 0)
+		return;
+
+	printf("\nSlabcache: %-20s  Aliases: %2d Order : %2d Objects: %lu\n",
+		s->name, s->aliases, s->order, s->objects);
+	if (s->hwcache_align)
+		printf("** Hardware cacheline aligned\n");
+	if (s->cache_dma)
+		printf("** Memory is allocated in a special DMA zone\n");
+	if (s->destroy_by_rcu)
+		printf("** Slabs are destroyed via RCU\n");
+	if (s->reclaim_account)
+		printf("** Reclaim accounting active\n");
+
+	printf("\nSizes (bytes)     Slabs              Debug                Memory\n");
+	printf("------------------------------------------------------------------------\n");
+	printf("Object : %7d  Total  : %7ld   Sanity Checks : %s  Total: %7ld\n",
+			s->object_size, s->slabs, onoff(s->sanity_checks),
+			s->slabs * (page_size << s->order));
+	printf("SlabObj: %7d  Full   : %7ld   Redzoning     : %s  Used : %7ld\n",
+			s->slab_size, s->slabs - s->partial - s->cpu_slabs,
+			onoff(s->red_zone), s->objects * s->object_size);
+	printf("SlabSiz: %7d  Partial: %7ld   Poisoning     : %s  Loss : %7ld\n",
+			page_size << s->order, s->partial, onoff(s->poison),
+			s->slabs * (page_size << s->order) - s->objects * s->object_size);
+	printf("Loss   : %7d  CpuSlab: %7d   Tracking      : %s  Lalig: %7ld\n",
+			s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
+			(s->slab_size - s->object_size) * s->objects);
+	printf("Align  : %7d  Objects: %7d   Tracing       : %s  Lpadd: %7ld\n",
+			s->align, s->objs_per_slab, onoff(s->trace),
+			((page_size << s->order) - s->objs_per_slab * s->slab_size) *
+			s->slabs);
+
+	ops(s);
+	show_tracking(s);
+	slab_numa(s, 1);
+	slab_stats(s);
+}
+
+static void slabcache(struct slabinfo *s)
+{
+	char size_str[20];
+	char dist_str[40];
+	char flags[20];
+	char *p = flags;
+
+	if (strcmp(s->name, "*") == 0)
+		return;
+
+	if (actual_slabs == 1) {
+		report(s);
+		return;
+	}
+
+	if (skip_zero && !show_empty && !s->slabs)
+		return;
+
+	if (show_empty && s->slabs)
+		return;
+
+	store_size(size_str, slab_size(s));
+	snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
+						s->partial, s->cpu_slabs);
+
+	if (!line++)
+		first_line();
+
+	if (s->aliases)
+		*p++ = '*';
+	if (s->cache_dma)
+		*p++ = 'd';
+	if (s->hwcache_align)
+		*p++ = 'A';
+	if (s->poison)
+		*p++ = 'P';
+	if (s->reclaim_account)
+		*p++ = 'a';
+	if (s->red_zone)
+		*p++ = 'Z';
+	if (s->sanity_checks)
+		*p++ = 'F';
+	if (s->store_user)
+		*p++ = 'U';
+	if (s->trace)
+		*p++ = 'T';
+
+	*p = 0;
+	if (show_activity) {
+		unsigned long total_alloc;
+		unsigned long total_free;
+
+		total_alloc = s->alloc_fastpath + s->alloc_slowpath;
+		total_free = s->free_fastpath + s->free_slowpath;
+
+		printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
+			s->name, s->objects,
+			total_alloc, total_free,
+			total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
+			total_free ? (s->free_fastpath * 100 / total_free) : 0,
+			s->order_fallback, s->order, s->cmpxchg_double_fail,
+			s->cmpxchg_double_cpu_fail);
+	}
+	else
+		printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
+			s->name, s->objects, s->object_size, size_str, dist_str,
+			s->objs_per_slab, s->order,
+			s->slabs ? (s->partial * 100) / s->slabs : 100,
+			s->slabs ? (s->objects * s->object_size * 100) /
+				(s->slabs * (page_size << s->order)) : 100,
+			flags);
+}
+
+/*
+ * Analyze debug options. Return false if something is amiss.
+ */
+static int debug_opt_scan(char *opt)
+{
+	if (!opt || !opt[0] || strcmp(opt, "-") == 0)
+		return 1;
+
+	if (strcasecmp(opt, "a") == 0) {
+		sanity = 1;
+		poison = 1;
+		redzone = 1;
+		tracking = 1;
+		return 1;
+	}
+
+	for ( ; *opt; opt++)
+		switch (*opt) {
+		case 'F' : case 'f':
+			if (sanity)
+				return 0;
+			sanity = 1;
+			break;
+		case 'P' : case 'p':
+			if (poison)
+				return 0;
+			poison = 1;
+			break;
+
+		case 'Z' : case 'z':
+			if (redzone)
+				return 0;
+			redzone = 1;
+			break;
+
+		case 'U' : case 'u':
+			if (tracking)
+				return 0;
+			tracking = 1;
+			break;
+
+		case 'T' : case 't':
+			if (tracing)
+				return 0;
+			tracing = 1;
+			break;
+		default:
+			return 0;
+		}
+	return 1;
+}
+
+static int slab_empty(struct slabinfo *s)
+{
+	if (s->objects > 0)
+		return 0;
+
+	/*
+	 * We may still have slabs even if there are no objects. Shrinking will
+	 * remove them.
+	 */
+	if (s->slabs != 0)
+		set_obj(s, "shrink", 1);
+
+	return 1;
+}
+
+static void slab_debug(struct slabinfo *s)
+{
+	if (strcmp(s->name, "*") == 0)
+		return;
+
+	if (sanity && !s->sanity_checks) {
+		set_obj(s, "sanity", 1);
+	}
+	if (!sanity && s->sanity_checks) {
+		if (slab_empty(s))
+			set_obj(s, "sanity", 0);
+		else
+			fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
+	}
+	if (redzone && !s->red_zone) {
+		if (slab_empty(s))
+			set_obj(s, "red_zone", 1);
+		else
+			fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
+	}
+	if (!redzone && s->red_zone) {
+		if (slab_empty(s))
+			set_obj(s, "red_zone", 0);
+		else
+			fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
+	}
+	if (poison && !s->poison) {
+		if (slab_empty(s))
+			set_obj(s, "poison", 1);
+		else
+			fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
+	}
+	if (!poison && s->poison) {
+		if (slab_empty(s))
+			set_obj(s, "poison", 0);
+		else
+			fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
+	}
+	if (tracking && !s->store_user) {
+		if (slab_empty(s))
+			set_obj(s, "store_user", 1);
+		else
+			fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
+	}
+	if (!tracking && s->store_user) {
+		if (slab_empty(s))
+			set_obj(s, "store_user", 0);
+		else
+			fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
+	}
+	if (tracing && !s->trace) {
+		if (slabs == 1)
+			set_obj(s, "trace", 1);
+		else
+			fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
+	}
+	if (!tracing && s->trace)
+		set_obj(s, "trace", 1);
+}
+
+static void totals(void)
+{
+	struct slabinfo *s;
+
+	int used_slabs = 0;
+	char b1[20], b2[20], b3[20], b4[20];
+	unsigned long long max = 1ULL << 63;
+
+	/* Object size */
+	unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
+
+	/* Number of partial slabs in a slabcache */
+	unsigned long long min_partial = max, max_partial = 0,
+				avg_partial, total_partial = 0;
+
+	/* Number of slabs in a slab cache */
+	unsigned long long min_slabs = max, max_slabs = 0,
+				avg_slabs, total_slabs = 0;
+
+	/* Size of the whole slab */
+	unsigned long long min_size = max, max_size = 0,
+				avg_size, total_size = 0;
+
+	/* Bytes used for object storage in a slab */
+	unsigned long long min_used = max, max_used = 0,
+				avg_used, total_used = 0;
+
+	/* Waste: Bytes used for alignment and padding */
+	unsigned long long min_waste = max, max_waste = 0,
+				avg_waste, total_waste = 0;
+	/* Number of objects in a slab */
+	unsigned long long min_objects = max, max_objects = 0,
+				avg_objects, total_objects = 0;
+	/* Waste per object */
+	unsigned long long min_objwaste = max,
+				max_objwaste = 0, avg_objwaste,
+				total_objwaste = 0;
+
+	/* Memory per object */
+	unsigned long long min_memobj = max,
+				max_memobj = 0, avg_memobj,
+				total_objsize = 0;
+
+	/* Percentage of partial slabs per slab */
+	unsigned long min_ppart = 100, max_ppart = 0,
+				avg_ppart, total_ppart = 0;
+
+	/* Number of objects in partial slabs */
+	unsigned long min_partobj = max, max_partobj = 0,
+				avg_partobj, total_partobj = 0;
+
+	/* Percentage of partial objects of all objects in a slab */
+	unsigned long min_ppartobj = 100, max_ppartobj = 0,
+				avg_ppartobj, total_ppartobj = 0;
+
+
+	for (s = slabinfo; s < slabinfo + slabs; s++) {
+		unsigned long long size;
+		unsigned long used;
+		unsigned long long wasted;
+		unsigned long long objwaste;
+		unsigned long percentage_partial_slabs;
+		unsigned long percentage_partial_objs;
+
+		if (!s->slabs || !s->objects)
+			continue;
+
+		used_slabs++;
+
+		size = slab_size(s);
+		used = s->objects * s->object_size;
+		wasted = size - used;
+		objwaste = s->slab_size - s->object_size;
+
+		percentage_partial_slabs = s->partial * 100 / s->slabs;
+		if (percentage_partial_slabs > 100)
+			percentage_partial_slabs = 100;
+
+		percentage_partial_objs = s->objects_partial * 100
+							/ s->objects;
+
+		if (percentage_partial_objs > 100)
+			percentage_partial_objs = 100;
+
+		if (s->object_size < min_objsize)
+			min_objsize = s->object_size;
+		if (s->partial < min_partial)
+			min_partial = s->partial;
+		if (s->slabs < min_slabs)
+			min_slabs = s->slabs;
+		if (size < min_size)
+			min_size = size;
+		if (wasted < min_waste)
+			min_waste = wasted;
+		if (objwaste < min_objwaste)
+			min_objwaste = objwaste;
+		if (s->objects < min_objects)
+			min_objects = s->objects;
+		if (used < min_used)
+			min_used = used;
+		if (s->objects_partial < min_partobj)
+			min_partobj = s->objects_partial;
+		if (percentage_partial_slabs < min_ppart)
+			min_ppart = percentage_partial_slabs;
+		if (percentage_partial_objs < min_ppartobj)
+			min_ppartobj = percentage_partial_objs;
+		if (s->slab_size < min_memobj)
+			min_memobj = s->slab_size;
+
+		if (s->object_size > max_objsize)
+			max_objsize = s->object_size;
+		if (s->partial > max_partial)
+			max_partial = s->partial;
+		if (s->slabs > max_slabs)
+			max_slabs = s->slabs;
+		if (size > max_size)
+			max_size = size;
+		if (wasted > max_waste)
+			max_waste = wasted;
+		if (objwaste > max_objwaste)
+			max_objwaste = objwaste;
+		if (s->objects > max_objects)
+			max_objects = s->objects;
+		if (used > max_used)
+			max_used = used;
+		if (s->objects_partial > max_partobj)
+			max_partobj = s->objects_partial;
+		if (percentage_partial_slabs > max_ppart)
+			max_ppart = percentage_partial_slabs;
+		if (percentage_partial_objs > max_ppartobj)
+			max_ppartobj = percentage_partial_objs;
+		if (s->slab_size > max_memobj)
+			max_memobj = s->slab_size;
+
+		total_partial += s->partial;
+		total_slabs += s->slabs;
+		total_size += size;
+		total_waste += wasted;
+
+		total_objects += s->objects;
+		total_used += used;
+		total_partobj += s->objects_partial;
+		total_ppart += percentage_partial_slabs;
+		total_ppartobj += percentage_partial_objs;
+
+		total_objwaste += s->objects * objwaste;
+		total_objsize += s->objects * s->slab_size;
+	}
+
+	if (!total_objects) {
+		printf("No objects\n");
+		return;
+	}
+	if (!used_slabs) {
+		printf("No slabs\n");
+		return;
+	}
+
+	/* Per slab averages */
+	avg_partial = total_partial / used_slabs;
+	avg_slabs = total_slabs / used_slabs;
+	avg_size = total_size / used_slabs;
+	avg_waste = total_waste / used_slabs;
+
+	avg_objects = total_objects / used_slabs;
+	avg_used = total_used / used_slabs;
+	avg_partobj = total_partobj / used_slabs;
+	avg_ppart = total_ppart / used_slabs;
+	avg_ppartobj = total_ppartobj / used_slabs;
+
+	/* Per object object sizes */
+	avg_objsize = total_used / total_objects;
+	avg_objwaste = total_objwaste / total_objects;
+	avg_partobj = total_partobj * 100 / total_objects;
+	avg_memobj = total_objsize / total_objects;
+
+	printf("Slabcache Totals\n");
+	printf("----------------\n");
+	printf("Slabcaches : %3d      Aliases  : %3d->%-3d Active: %3d\n",
+			slabs, aliases, alias_targets, used_slabs);
+
+	store_size(b1, total_size);store_size(b2, total_waste);
+	store_size(b3, total_waste * 100 / total_used);
+	printf("Memory used: %6s   # Loss   : %6s   MRatio:%6s%%\n", b1, b2, b3);
+
+	store_size(b1, total_objects);store_size(b2, total_partobj);
+	store_size(b3, total_partobj * 100 / total_objects);
+	printf("# Objects  : %6s   # PartObj: %6s   ORatio:%6s%%\n", b1, b2, b3);
+
+	printf("\n");
+	printf("Per Cache    Average         Min         Max       Total\n");
+	printf("---------------------------------------------------------\n");
+
+	store_size(b1, avg_objects);store_size(b2, min_objects);
+	store_size(b3, max_objects);store_size(b4, total_objects);
+	printf("#Objects  %10s  %10s  %10s  %10s\n",
+			b1,	b2,	b3,	b4);
+
+	store_size(b1, avg_slabs);store_size(b2, min_slabs);
+	store_size(b3, max_slabs);store_size(b4, total_slabs);
+	printf("#Slabs    %10s  %10s  %10s  %10s\n",
+			b1,	b2,	b3,	b4);
+
+	store_size(b1, avg_partial);store_size(b2, min_partial);
+	store_size(b3, max_partial);store_size(b4, total_partial);
+	printf("#PartSlab %10s  %10s  %10s  %10s\n",
+			b1,	b2,	b3,	b4);
+	store_size(b1, avg_ppart);store_size(b2, min_ppart);
+	store_size(b3, max_ppart);
+	store_size(b4, total_partial * 100  / total_slabs);
+	printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
+			b1,	b2,	b3,	b4);
+
+	store_size(b1, avg_partobj);store_size(b2, min_partobj);
+	store_size(b3, max_partobj);
+	store_size(b4, total_partobj);
+	printf("PartObjs  %10s  %10s  %10s  %10s\n",
+			b1,	b2,	b3,	b4);
+
+	store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
+	store_size(b3, max_ppartobj);
+	store_size(b4, total_partobj * 100 / total_objects);
+	printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
+			b1,	b2,	b3,	b4);
+
+	store_size(b1, avg_size);store_size(b2, min_size);
+	store_size(b3, max_size);store_size(b4, total_size);
+	printf("Memory    %10s  %10s  %10s  %10s\n",
+			b1,	b2,	b3,	b4);
+
+	store_size(b1, avg_used);store_size(b2, min_used);
+	store_size(b3, max_used);store_size(b4, total_used);
+	printf("Used      %10s  %10s  %10s  %10s\n",
+			b1,	b2,	b3,	b4);
+
+	store_size(b1, avg_waste);store_size(b2, min_waste);
+	store_size(b3, max_waste);store_size(b4, total_waste);
+	printf("Loss      %10s  %10s  %10s  %10s\n",
+			b1,	b2,	b3,	b4);
+
+	printf("\n");
+	printf("Per Object   Average         Min         Max\n");
+	printf("---------------------------------------------\n");
+
+	store_size(b1, avg_memobj);store_size(b2, min_memobj);
+	store_size(b3, max_memobj);
+	printf("Memory    %10s  %10s  %10s\n",
+			b1,	b2,	b3);
+	store_size(b1, avg_objsize);store_size(b2, min_objsize);
+	store_size(b3, max_objsize);
+	printf("User      %10s  %10s  %10s\n",
+			b1,	b2,	b3);
+
+	store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
+	store_size(b3, max_objwaste);
+	printf("Loss      %10s  %10s  %10s\n",
+			b1,	b2,	b3);
+}
+
+static void sort_slabs(void)
+{
+	struct slabinfo *s1,*s2;
+
+	for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
+		for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
+			int result;
+
+			if (sort_size)
+				result = slab_size(s1) < slab_size(s2);
+			else if (sort_active)
+				result = slab_activity(s1) < slab_activity(s2);
+			else
+				result = strcasecmp(s1->name, s2->name);
+
+			if (show_inverted)
+				result = -result;
+
+			if (result > 0) {
+				struct slabinfo t;
+
+				memcpy(&t, s1, sizeof(struct slabinfo));
+				memcpy(s1, s2, sizeof(struct slabinfo));
+				memcpy(s2, &t, sizeof(struct slabinfo));
+			}
+		}
+	}
+}
+
+static void sort_aliases(void)
+{
+	struct aliasinfo *a1,*a2;
+
+	for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
+		for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
+			char *n1, *n2;
+
+			n1 = a1->name;
+			n2 = a2->name;
+			if (show_alias && !show_inverted) {
+				n1 = a1->ref;
+				n2 = a2->ref;
+			}
+			if (strcasecmp(n1, n2) > 0) {
+				struct aliasinfo t;
+
+				memcpy(&t, a1, sizeof(struct aliasinfo));
+				memcpy(a1, a2, sizeof(struct aliasinfo));
+				memcpy(a2, &t, sizeof(struct aliasinfo));
+			}
+		}
+	}
+}
+
+static void link_slabs(void)
+{
+	struct aliasinfo *a;
+	struct slabinfo *s;
+
+	for (a = aliasinfo; a < aliasinfo + aliases; a++) {
+
+		for (s = slabinfo; s < slabinfo + slabs; s++)
+			if (strcmp(a->ref, s->name) == 0) {
+				a->slab = s;
+				s->refs++;
+				break;
+			}
+		if (s == slabinfo + slabs)
+			fatal("Unresolved alias %s\n", a->ref);
+	}
+}
+
+static void alias(void)
+{
+	struct aliasinfo *a;
+	char *active = NULL;
+
+	sort_aliases();
+	link_slabs();
+
+	for(a = aliasinfo; a < aliasinfo + aliases; a++) {
+
+		if (!show_single_ref && a->slab->refs == 1)
+			continue;
+
+		if (!show_inverted) {
+			if (active) {
+				if (strcmp(a->slab->name, active) == 0) {
+					printf(" %s", a->name);
+					continue;
+				}
+			}
+			printf("\n%-12s <- %s", a->slab->name, a->name);
+			active = a->slab->name;
+		}
+		else
+			printf("%-20s -> %s\n", a->name, a->slab->name);
+	}
+	if (active)
+		printf("\n");
+}
+
+
+static void rename_slabs(void)
+{
+	struct slabinfo *s;
+	struct aliasinfo *a;
+
+	for (s = slabinfo; s < slabinfo + slabs; s++) {
+		if (*s->name != ':')
+			continue;
+
+		if (s->refs > 1 && !show_first_alias)
+			continue;
+
+		a = find_one_alias(s);
+
+		if (a)
+			s->name = a->name;
+		else {
+			s->name = "*";
+			actual_slabs--;
+		}
+	}
+}
+
+static int slab_mismatch(char *slab)
+{
+	return regexec(&pattern, slab, 0, NULL, 0);
+}
+
+static void read_slab_dir(void)
+{
+	DIR *dir;
+	struct dirent *de;
+	struct slabinfo *slab = slabinfo;
+	struct aliasinfo *alias = aliasinfo;
+	char *p;
+	char *t;
+	int count;
+
+	if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
+		fatal("SYSFS support for SLUB not active\n");
+
+	dir = opendir(".");
+	while ((de = readdir(dir))) {
+		if (de->d_name[0] == '.' ||
+			(de->d_name[0] != ':' && slab_mismatch(de->d_name)))
+				continue;
+		switch (de->d_type) {
+		   case DT_LNK:
+			alias->name = strdup(de->d_name);
+			count = readlink(de->d_name, buffer, sizeof(buffer)-1);
+
+			if (count < 0)
+				fatal("Cannot read symlink %s\n", de->d_name);
+
+			buffer[count] = 0;
+			p = buffer + count;
+			while (p > buffer && p[-1] != '/')
+				p--;
+			alias->ref = strdup(p);
+			alias++;
+			break;
+		   case DT_DIR:
+			if (chdir(de->d_name))
+				fatal("Unable to access slab %s\n", slab->name);
+			slab->name = strdup(de->d_name);
+			slab->alias = 0;
+			slab->refs = 0;
+			slab->aliases = get_obj("aliases");
+			slab->align = get_obj("align");
+			slab->cache_dma = get_obj("cache_dma");
+			slab->cpu_slabs = get_obj("cpu_slabs");
+			slab->destroy_by_rcu = get_obj("destroy_by_rcu");
+			slab->hwcache_align = get_obj("hwcache_align");
+			slab->object_size = get_obj("object_size");
+			slab->objects = get_obj("objects");
+			slab->objects_partial = get_obj("objects_partial");
+			slab->objects_total = get_obj("objects_total");
+			slab->objs_per_slab = get_obj("objs_per_slab");
+			slab->order = get_obj("order");
+			slab->partial = get_obj("partial");
+			slab->partial = get_obj_and_str("partial", &t);
+			decode_numa_list(slab->numa_partial, t);
+			free(t);
+			slab->poison = get_obj("poison");
+			slab->reclaim_account = get_obj("reclaim_account");
+			slab->red_zone = get_obj("red_zone");
+			slab->sanity_checks = get_obj("sanity_checks");
+			slab->slab_size = get_obj("slab_size");
+			slab->slabs = get_obj_and_str("slabs", &t);
+			decode_numa_list(slab->numa, t);
+			free(t);
+			slab->store_user = get_obj("store_user");
+			slab->trace = get_obj("trace");
+			slab->alloc_fastpath = get_obj("alloc_fastpath");
+			slab->alloc_slowpath = get_obj("alloc_slowpath");
+			slab->free_fastpath = get_obj("free_fastpath");
+			slab->free_slowpath = get_obj("free_slowpath");
+			slab->free_frozen= get_obj("free_frozen");
+			slab->free_add_partial = get_obj("free_add_partial");
+			slab->free_remove_partial = get_obj("free_remove_partial");
+			slab->alloc_from_partial = get_obj("alloc_from_partial");
+			slab->alloc_slab = get_obj("alloc_slab");
+			slab->alloc_refill = get_obj("alloc_refill");
+			slab->free_slab = get_obj("free_slab");
+			slab->cpuslab_flush = get_obj("cpuslab_flush");
+			slab->deactivate_full = get_obj("deactivate_full");
+			slab->deactivate_empty = get_obj("deactivate_empty");
+			slab->deactivate_to_head = get_obj("deactivate_to_head");
+			slab->deactivate_to_tail = get_obj("deactivate_to_tail");
+			slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
+			slab->order_fallback = get_obj("order_fallback");
+			slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
+			slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
+			slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
+			slab->cpu_partial_free = get_obj("cpu_partial_free");
+			slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
+			slab->deactivate_bypass = get_obj("deactivate_bypass");
+			chdir("..");
+			if (slab->name[0] == ':')
+				alias_targets++;
+			slab++;
+			break;
+		   default :
+			fatal("Unknown file type %lx\n", de->d_type);
+		}
+	}
+	closedir(dir);
+	slabs = slab - slabinfo;
+	actual_slabs = slabs;
+	aliases = alias - aliasinfo;
+	if (slabs > MAX_SLABS)
+		fatal("Too many slabs\n");
+	if (aliases > MAX_ALIASES)
+		fatal("Too many aliases\n");
+}
+
+static void output_slabs(void)
+{
+	struct slabinfo *slab;
+
+	for (slab = slabinfo; slab < slabinfo + slabs; slab++) {
+
+		if (slab->alias)
+			continue;
+
+
+		if (show_numa)
+			slab_numa(slab, 0);
+		else if (show_track)
+			show_tracking(slab);
+		else if (validate)
+			slab_validate(slab);
+		else if (shrink)
+			slab_shrink(slab);
+		else if (set_debug)
+			slab_debug(slab);
+		else if (show_ops)
+			ops(slab);
+		else if (show_slab)
+			slabcache(slab);
+		else if (show_report)
+			report(slab);
+	}
+}
+
+struct option opts[] = {
+	{ "aliases", 0, NULL, 'a' },
+	{ "activity", 0, NULL, 'A' },
+	{ "debug", 2, NULL, 'd' },
+	{ "display-activity", 0, NULL, 'D' },
+	{ "empty", 0, NULL, 'e' },
+	{ "first-alias", 0, NULL, 'f' },
+	{ "help", 0, NULL, 'h' },
+	{ "inverted", 0, NULL, 'i'},
+	{ "numa", 0, NULL, 'n' },
+	{ "ops", 0, NULL, 'o' },
+	{ "report", 0, NULL, 'r' },
+	{ "shrink", 0, NULL, 's' },
+	{ "slabs", 0, NULL, 'l' },
+	{ "track", 0, NULL, 't'},
+	{ "validate", 0, NULL, 'v' },
+	{ "zero", 0, NULL, 'z' },
+	{ "1ref", 0, NULL, '1'},
+	{ NULL, 0, NULL, 0 }
+};
+
+int main(int argc, char *argv[])
+{
+	int c;
+	int err;
+	char *pattern_source;
+
+	page_size = getpagesize();
+
+	while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTS",
+						opts, NULL)) != -1)
+		switch (c) {
+		case '1':
+			show_single_ref = 1;
+			break;
+		case 'a':
+			show_alias = 1;
+			break;
+		case 'A':
+			sort_active = 1;
+			break;
+		case 'd':
+			set_debug = 1;
+			if (!debug_opt_scan(optarg))
+				fatal("Invalid debug option '%s'\n", optarg);
+			break;
+		case 'D':
+			show_activity = 1;
+			break;
+		case 'e':
+			show_empty = 1;
+			break;
+		case 'f':
+			show_first_alias = 1;
+			break;
+		case 'h':
+			usage();
+			return 0;
+		case 'i':
+			show_inverted = 1;
+			break;
+		case 'n':
+			show_numa = 1;
+			break;
+		case 'o':
+			show_ops = 1;
+			break;
+		case 'r':
+			show_report = 1;
+			break;
+		case 's':
+			shrink = 1;
+			break;
+		case 'l':
+			show_slab = 1;
+			break;
+		case 't':
+			show_track = 1;
+			break;
+		case 'v':
+			validate = 1;
+			break;
+		case 'z':
+			skip_zero = 0;
+			break;
+		case 'T':
+			show_totals = 1;
+			break;
+		case 'S':
+			sort_size = 1;
+			break;
+
+		default:
+			fatal("%s: Invalid option '%c'\n", argv[0], optopt);
+
+	}
+
+	if (!show_slab && !show_alias && !show_track && !show_report
+		&& !validate && !shrink && !set_debug && !show_ops)
+			show_slab = 1;
+
+	if (argc > optind)
+		pattern_source = argv[optind];
+	else
+		pattern_source = ".*";
+
+	err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
+	if (err)
+		fatal("%s: Invalid pattern '%s' code %d\n",
+			argv[0], pattern_source, err);
+	read_slab_dir();
+	if (show_alias)
+		alias();
+	else
+	if (show_totals)
+		totals();
+	else {
+		link_slabs();
+		rename_slabs();
+		sort_slabs();
+		output_slabs();
+	}
+	return 0;
+}