diff options
Diffstat (limited to 'include/linux/uksm.h')
| -rw-r--r-- | include/linux/uksm.h | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/include/linux/uksm.h b/include/linux/uksm.h deleted file mode 100644 index 206f10958..000000000 --- a/include/linux/uksm.h +++ /dev/null @@ -1,146 +0,0 @@ -#ifndef __LINUX_UKSM_H -#define __LINUX_UKSM_H -/* - * Memory merging support. - * - * This code enables dynamic sharing of identical pages found in different - * memory areas, even if they are not shared by fork(). - */ - -/* if !CONFIG_UKSM this file should not be compiled at all. */ -#ifdef CONFIG_UKSM - -#include <linux/bitops.h> -#include <linux/mm.h> -#include <linux/pagemap.h> -#include <linux/rmap.h> -#include <linux/sched.h> - -extern unsigned long zero_pfn __read_mostly; -extern unsigned long uksm_zero_pfn __read_mostly; -extern struct page *empty_uksm_zero_page; - -/* must be done before linked to mm */ -extern void uksm_vma_add_new(struct vm_area_struct *vma); -extern void uksm_remove_vma(struct vm_area_struct *vma); - -#define UKSM_SLOT_NEED_SORT (1 << 0) -#define UKSM_SLOT_NEED_RERAND (1 << 1) -#define UKSM_SLOT_SCANNED (1 << 2) /* It's scanned in this round */ -#define UKSM_SLOT_FUL_SCANNED (1 << 3) -#define UKSM_SLOT_IN_UKSM (1 << 4) - -struct vma_slot { - struct sradix_tree_node *snode; - unsigned long sindex; - - struct list_head slot_list; - unsigned long fully_scanned_round; - unsigned long dedup_num; - unsigned long pages_scanned; - unsigned long last_scanned; - unsigned long pages_to_scan; - struct scan_rung *rung; - struct page **rmap_list_pool; - unsigned int *pool_counts; - unsigned long pool_size; - struct vm_area_struct *vma; - struct mm_struct *mm; - unsigned long ctime_j; - unsigned long pages; - unsigned long flags; - unsigned long pages_cowed; /* pages cowed this round */ - unsigned long pages_merged; /* pages merged this round */ - unsigned long pages_bemerged; - - /* when it has page merged in this eval round */ - struct list_head dedup_list; -}; - -static inline void uksm_unmap_zero_page(pte_t pte) -{ - if (pte_pfn(pte) == uksm_zero_pfn) - __dec_zone_page_state(empty_uksm_zero_page, NR_UKSM_ZERO_PAGES); -} - -static inline void uksm_map_zero_page(pte_t pte) -{ - if (pte_pfn(pte) == uksm_zero_pfn) - __inc_zone_page_state(empty_uksm_zero_page, NR_UKSM_ZERO_PAGES); -} - -static inline void uksm_cow_page(struct vm_area_struct *vma, struct page *page) -{ - if (vma->uksm_vma_slot && PageKsm(page)) - vma->uksm_vma_slot->pages_cowed++; -} - -static inline void uksm_cow_pte(struct vm_area_struct *vma, pte_t pte) -{ - if (vma->uksm_vma_slot && pte_pfn(pte) == uksm_zero_pfn) - vma->uksm_vma_slot->pages_cowed++; -} - -static inline int uksm_flags_can_scan(unsigned long vm_flags) -{ -#ifndef VM_SAO -#define VM_SAO 0 -#endif - return !(vm_flags & (VM_PFNMAP | VM_IO | VM_DONTEXPAND | - VM_HUGETLB | VM_MIXEDMAP | VM_SHARED - | VM_MAYSHARE | VM_GROWSUP | VM_GROWSDOWN | VM_SAO)); -} - -static inline void uksm_vm_flags_mod(unsigned long *vm_flags_p) -{ - if (uksm_flags_can_scan(*vm_flags_p)) - *vm_flags_p |= VM_MERGEABLE; -} - -/* - * Just a wrapper for BUG_ON for where ksm_zeropage must not be. TODO: it will - * be removed when uksm zero page patch is stable enough. - */ -static inline void uksm_bugon_zeropage(pte_t pte) -{ - BUG_ON(pte_pfn(pte) == uksm_zero_pfn); -} -#else -static inline void uksm_vma_add_new(struct vm_area_struct *vma) -{ -} - -static inline void uksm_remove_vma(struct vm_area_struct *vma) -{ -} - -static inline void uksm_unmap_zero_page(pte_t pte) -{ -} - -static inline void uksm_map_zero_page(pte_t pte) -{ -} - -static inline void uksm_cow_page(struct vm_area_struct *vma, struct page *page) -{ -} - -static inline void uksm_cow_pte(struct vm_area_struct *vma, pte_t pte) -{ -} - -static inline int uksm_flags_can_scan(unsigned long vm_flags) -{ - return 0; -} - -static inline void uksm_vm_flags_mod(unsigned long *vm_flags_p) -{ -} - -static inline void uksm_bugon_zeropage(pte_t pte) -{ -} -#endif /* !CONFIG_UKSM */ -#endif /* __LINUX_UKSM_H */ |