- patches.suse/slab-handle-memoryless-nodes-v2a.patch: Refresh.

[linux-flexiantxendom0-3.2.10.git] / include / linux / mm.h

diff --git a/include/linux/mm.h b/include/linux/mm.h
index a4d6e70..5951384 100644 (file)
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -102,12 +102,7 @@ extern unsigned int kobjsize(const void *objp);
 
 #define VM_CAN_NONLINEAR 0x08000000    /* Has ->fault & does nonlinear pages */
 #define VM_MIXEDMAP    0x10000000      /* Can contain "struct page" and pure PFN pages */
-#ifndef CONFIG_XEN
 #define VM_SAO         0x20000000      /* Strong Access Ordering (powerpc) */
-#else
-#define VM_SAO         0
-#define VM_FOREIGN     0x20000000      /* Has pages belonging to another VM */
-#endif
 #define VM_PFN_AT_MMAP 0x40000000      /* PFNMAP vma that is fully mapped at mmap time */
 #define VM_MERGEABLE   0x80000000      /* KSM may merge identical pages */
 
@@ -132,12 +127,6 @@ extern unsigned int kobjsize(const void *objp);
  */
 #define VM_SPECIAL (VM_IO | VM_DONTEXPAND | VM_RESERVED | VM_PFNMAP)
 
-#ifdef CONFIG_XEN
-struct vm_foreign_map {
-       struct page **map;
-};
-#endif
-
 /*
  * mapping from the currently active vm_flags protection bits (the
  * low four bits) to a page protection mask..
@@ -209,17 +198,6 @@ struct vm_operations_struct {
         */
        int (*access)(struct vm_area_struct *vma, unsigned long addr,
                      void *buf, int len, int write);
-
-#ifdef CONFIG_XEN
-       /* Area-specific function for clearing the PTE at @ptep. Returns the
-        * original value of @ptep. */
-       pte_t (*zap_pte)(struct vm_area_struct *vma,
-                        unsigned long addr, pte_t *ptep, int is_fullmm);
-
-       /* called before close() to indicate no more pages should be mapped */
-       void (*unmap)(struct vm_area_struct *area);
-#endif
-
 #ifdef CONFIG_NUMA
        /*
         * set_policy() op must add a reference to any non-NULL @new mempolicy
@@ -645,13 +623,22 @@ void page_address_init(void);
 /*
  * On an anonymous page mapped into a user virtual memory area,
  * page->mapping points to its anon_vma, not to a struct address_space;
- * with the PAGE_MAPPING_ANON bit set to distinguish it.
+ * with the PAGE_MAPPING_ANON bit set to distinguish it.  See rmap.h.
+ *
+ * On an anonymous page in a VM_MERGEABLE area, if CONFIG_KSM is enabled,
+ * the PAGE_MAPPING_KSM bit may be set along with the PAGE_MAPPING_ANON bit;
+ * and then page->mapping points, not to an anon_vma, but to a private
+ * structure which KSM associates with that merged page.  See ksm.h.
+ *
+ * PAGE_MAPPING_KSM without PAGE_MAPPING_ANON is currently never used.
  *
  * Please note that, confusingly, "page_mapping" refers to the inode
  * address_space which maps the page from disk; whereas "page_mapped"
  * refers to user virtual address space into which the page is mapped.
  */
 #define PAGE_MAPPING_ANON      1
+#define PAGE_MAPPING_KSM       2
+#define PAGE_MAPPING_FLAGS     (PAGE_MAPPING_ANON | PAGE_MAPPING_KSM)
 
 extern struct address_space swapper_space;
 static inline struct address_space *page_mapping(struct page *page)
@@ -659,16 +646,19 @@ static inline struct address_space *page_mapping(struct page *page)
        struct address_space *mapping = page->mapping;
 
        VM_BUG_ON(PageSlab(page));
-#ifdef CONFIG_SWAP
        if (unlikely(PageSwapCache(page)))
                mapping = &swapper_space;
-       else
-#endif
-       if (unlikely((unsigned long)mapping & PAGE_MAPPING_ANON))
+       else if (unlikely((unsigned long)mapping & PAGE_MAPPING_ANON))
                mapping = NULL;
        return mapping;
 }
 
+/* Neutral page->mapping pointer to address_space or anon_vma or other */
+static inline void *page_rmapping(struct page *page)
+{
+       return (void *)((unsigned long)page->mapping & ~PAGE_MAPPING_FLAGS);
+}
+
 extern struct address_space *__page_file_mapping(struct page *);
 
 static inline
@@ -808,6 +798,7 @@ unsigned long unmap_vmas(struct mmu_gather **tlb,
  * @pmd_entry: if set, called for each non-empty PMD (3rd-level) entry
  * @pte_entry: if set, called for each non-empty PTE (4th-level) entry
  * @pte_hole: if set, called for each hole at all levels
+ * @hugetlb_entry: if set, called for each hugetlb entry
  *
  * (see walk_page_range for more details)
  */
@@ -817,6 +808,8 @@ struct mm_walk {
        int (*pmd_entry)(pmd_t *, unsigned long, unsigned long, struct mm_walk *);
        int (*pte_entry)(pte_t *, unsigned long, unsigned long, struct mm_walk *);
        int (*pte_hole)(unsigned long, unsigned long, struct mm_walk *);
+       int (*hugetlb_entry)(pte_t *, unsigned long, unsigned long,
+                            struct mm_walk *);
        struct mm_struct *mm;
        void *private;
 };
@@ -1075,6 +1068,9 @@ extern void add_active_range(unsigned int nid, unsigned long start_pfn,
 extern void remove_active_range(unsigned int nid, unsigned long start_pfn,
                                        unsigned long end_pfn);
 extern void remove_all_active_ranges(void);
+void sort_node_map(void);
+unsigned long __absent_pages_in_range(int nid, unsigned long start_pfn,
+                                               unsigned long end_pfn);
 extern unsigned long absent_pages_in_range(unsigned long start_pfn,
                                                unsigned long end_pfn);
 extern void get_pfn_range_for_nid(unsigned int nid,
@@ -1124,6 +1120,7 @@ extern void zone_pcp_update(struct zone *zone);
 
 /* nommu.c */
 extern atomic_long_t mmap_pages_allocated;
+extern int nommu_shrink_inode_mappings(struct inode *, size_t, size_t);
 
 /* prio_tree.c */
 void vma_prio_tree_add(struct vm_area_struct *, struct vm_area_struct *old);
@@ -1379,6 +1376,7 @@ enum mf_flags {
 };
 extern void memory_failure(unsigned long pfn, int trapno);
 extern int __memory_failure(unsigned long pfn, int trapno, int flags);
+extern int unpoison_memory(unsigned long pfn);
 extern int sysctl_memory_failure_early_kill;
 extern int sysctl_memory_failure_recovery;
 extern void shake_page(struct page *p, int access);