diff options
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/array.c | 10 | ||||
| -rw-r--r-- | fs/proc/base.c | 11 | ||||
| -rw-r--r-- | fs/proc/fd.c | 14 | ||||
| -rw-r--r-- | fs/proc/meminfo.c | 7 | ||||
| -rw-r--r-- | fs/proc/proc_sysctl.c | 2 | ||||
| -rw-r--r-- | fs/proc/task_mmu.c | 64 |
6 files changed, 82 insertions, 26 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c index eed2050db..d73291f5f 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -91,18 +91,18 @@ static inline void task_name(struct seq_file *m, struct task_struct *p) { char *buf; + size_t size; char tcomm[sizeof(p->comm)]; + int ret; get_task_comm(tcomm, p); seq_puts(m, "Name:\t"); - buf = m->buf + m->count; - /* Ignore error for now */ - buf += string_escape_str(tcomm, buf, m->size - m->count, - ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\"); + size = seq_get_buf(m, &buf); + ret = string_escape_str(tcomm, buf, size, ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\"); + seq_commit(m, ret < size ? ret : -1); - m->count = buf - m->buf; seq_putc(m, '\n'); } diff --git a/fs/proc/base.c b/fs/proc/base.c index ac5498d9b..db91213bb 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -1032,6 +1032,16 @@ static ssize_t oom_adj_read(struct file *file, char __user *buf, size_t count, return simple_read_from_buffer(buf, count, ppos, buffer, len); } +/* + * /proc/pid/oom_adj exists solely for backwards compatibility with previous + * kernels. The effective policy is defined by oom_score_adj, which has a + * different scale: oom_adj grew exponentially and oom_score_adj grows linearly. + * Values written to oom_adj are simply mapped linearly to oom_score_adj. + * Processes that become oom disabled via oom_adj will still be oom disabled + * with this implementation. + * + * oom_adj cannot be removed since existing userspace binaries use it. + */ static ssize_t oom_adj_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { @@ -2484,6 +2494,7 @@ static ssize_t proc_coredump_filter_write(struct file *file, mm = get_task_mm(task); if (!mm) goto out_no_mm; + ret = 0; for (i = 0, mask = 1; i < MMF_DUMP_FILTER_BITS; i++, mask <<= 1) { if (val & mask) diff --git a/fs/proc/fd.c b/fs/proc/fd.c index 6e5fcd007..3c2a915c6 100644 --- a/fs/proc/fd.c +++ b/fs/proc/fd.c @@ -291,11 +291,19 @@ static struct dentry *proc_lookupfd(struct inode *dir, struct dentry *dentry, */ int proc_fd_permission(struct inode *inode, int mask) { - int rv = generic_permission(inode, mask); + struct task_struct *p; + int rv; + + rv = generic_permission(inode, mask); if (rv == 0) - return 0; - if (task_tgid(current) == proc_pid(inode)) + return rv; + + rcu_read_lock(); + p = pid_task(proc_pid(inode), PIDTYPE_PID); + if (p && same_thread_group(p, current)) rv = 0; + rcu_read_unlock(); + return rv; } diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c index f151d216c..ae836fbb0 100644 --- a/fs/proc/meminfo.c +++ b/fs/proc/meminfo.c @@ -27,7 +27,6 @@ static int meminfo_proc_show(struct seq_file *m, void *v) { struct sysinfo i; unsigned long committed; - struct vmalloc_info vmi; long cached; long available; unsigned long pagecache; @@ -49,8 +48,6 @@ static int meminfo_proc_show(struct seq_file *m, void *v) if (cached < 0) cached = 0; - get_vmalloc_info(&vmi); - for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++) pages[lru] = global_page_state(NR_LRU_BASE + lru); @@ -197,8 +194,8 @@ static int meminfo_proc_show(struct seq_file *m, void *v) K(vm_commit_limit()), K(committed), (unsigned long)VMALLOC_TOTAL >> 10, - vmi.used >> 10, - vmi.largest_chunk >> 10 + 0ul, // used to be vmalloc 'used' + 0ul // used to be vmalloc 'largest_chunk' #ifdef CONFIG_MEMORY_FAILURE , atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10) #endif diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c index fdda62e61..fe5b6e6c4 100644 --- a/fs/proc/proc_sysctl.c +++ b/fs/proc/proc_sysctl.c @@ -948,7 +948,7 @@ static struct ctl_dir *get_subdir(struct ctl_dir *dir, found: subdir->header.nreg++; failed: - if (unlikely(IS_ERR(subdir))) { + if (IS_ERR(subdir)) { pr_err("sysctl could not get directory: "); sysctl_print_dir(dir); pr_cont("/%*.*s %ld\n", diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 5e7e631af..e03793e75 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -70,6 +70,7 @@ void task_mem(struct seq_file *m, struct mm_struct *mm) ptes >> 10, pmds >> 10, swap << (PAGE_SHIFT-10)); + hugetlb_report_usage(m, mm); } unsigned long task_vsize(struct mm_struct *mm) @@ -449,6 +450,8 @@ struct mem_size_stats { unsigned long anonymous; unsigned long anonymous_thp; unsigned long swap; + unsigned long shared_hugetlb; + unsigned long private_hugetlb; u64 pss; u64 swap_pss; }; @@ -628,12 +631,44 @@ static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma) seq_putc(m, '\n'); } +#ifdef CONFIG_HUGETLB_PAGE +static int smaps_hugetlb_range(pte_t *pte, unsigned long hmask, + unsigned long addr, unsigned long end, + struct mm_walk *walk) +{ + struct mem_size_stats *mss = walk->private; + struct vm_area_struct *vma = walk->vma; + struct page *page = NULL; + + if (pte_present(*pte)) { + page = vm_normal_page(vma, addr, *pte); + } else if (is_swap_pte(*pte)) { + swp_entry_t swpent = pte_to_swp_entry(*pte); + + if (is_migration_entry(swpent)) + page = migration_entry_to_page(swpent); + } + if (page) { + int mapcount = page_mapcount(page); + + if (mapcount >= 2) + mss->shared_hugetlb += huge_page_size(hstate_vma(vma)); + else + mss->private_hugetlb += huge_page_size(hstate_vma(vma)); + } + return 0; +} +#endif /* HUGETLB_PAGE */ + static int show_smap(struct seq_file *m, void *v, int is_pid) { struct vm_area_struct *vma = v; struct mem_size_stats mss; struct mm_walk smaps_walk = { .pmd_entry = smaps_pte_range, +#ifdef CONFIG_HUGETLB_PAGE + .hugetlb_entry = smaps_hugetlb_range, +#endif .mm = vma->vm_mm, .private = &mss, }; @@ -655,6 +690,8 @@ static int show_smap(struct seq_file *m, void *v, int is_pid) "Referenced: %8lu kB\n" "Anonymous: %8lu kB\n" "AnonHugePages: %8lu kB\n" + "Shared_Hugetlb: %8lu kB\n" + "Private_Hugetlb: %7lu kB\n" "Swap: %8lu kB\n" "SwapPss: %8lu kB\n" "KernelPageSize: %8lu kB\n" @@ -670,6 +707,8 @@ static int show_smap(struct seq_file *m, void *v, int is_pid) mss.referenced >> 10, mss.anonymous >> 10, mss.anonymous_thp >> 10, + mss.shared_hugetlb >> 10, + mss.private_hugetlb >> 10, mss.swap >> 10, (unsigned long)(mss.swap_pss >> (10 + PSS_SHIFT)), vma_kernel_pagesize(vma) >> 10, @@ -756,36 +795,37 @@ static inline void clear_soft_dirty(struct vm_area_struct *vma, pte_t ptent = *pte; if (pte_present(ptent)) { + ptent = ptep_modify_prot_start(vma->vm_mm, addr, pte); ptent = pte_wrprotect(ptent); - ptent = pte_clear_flags(ptent, _PAGE_SOFT_DIRTY); + ptent = pte_clear_soft_dirty(ptent); + ptep_modify_prot_commit(vma->vm_mm, addr, pte, ptent); } else if (is_swap_pte(ptent)) { ptent = pte_swp_clear_soft_dirty(ptent); + set_pte_at(vma->vm_mm, addr, pte, ptent); } - - set_pte_at(vma->vm_mm, addr, pte, ptent); } +#else +static inline void clear_soft_dirty(struct vm_area_struct *vma, + unsigned long addr, pte_t *pte) +{ +} +#endif +#if defined(CONFIG_MEM_SOFT_DIRTY) && defined(CONFIG_TRANSPARENT_HUGEPAGE) static inline void clear_soft_dirty_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmdp) { - pmd_t pmd = *pmdp; + pmd_t pmd = pmdp_huge_get_and_clear(vma->vm_mm, addr, pmdp); pmd = pmd_wrprotect(pmd); - pmd = pmd_clear_flags(pmd, _PAGE_SOFT_DIRTY); + pmd = pmd_clear_soft_dirty(pmd); if (vma->vm_flags & VM_SOFTDIRTY) vma->vm_flags &= ~VM_SOFTDIRTY; set_pmd_at(vma->vm_mm, addr, pmdp, pmd); } - #else - -static inline void clear_soft_dirty(struct vm_area_struct *vma, - unsigned long addr, pte_t *pte) -{ -} - static inline void clear_soft_dirty_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmdp) { |