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-rw-r--r--include/linux/rmap.h36
1 files changed, 20 insertions, 16 deletions
diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index 3fce545df39..bfe1f478064 100644
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -37,14 +37,14 @@ struct anon_vma {
atomic_t refcount;
/*
- * NOTE: the LSB of the head.next is set by
+ * NOTE: the LSB of the rb_root.rb_node is set by
* mm_take_all_locks() _after_ taking the above lock. So the
- * head must only be read/written after taking the above lock
+ * rb_root must only be read/written after taking the above lock
* to be sure to see a valid next pointer. The LSB bit itself
* is serialized by a system wide lock only visible to
* mm_take_all_locks() (mm_all_locks_mutex).
*/
- struct list_head head; /* Chain of private "related" vmas */
+ struct rb_root rb_root; /* Interval tree of private "related" vmas */
};
/*
@@ -57,14 +57,29 @@ struct anon_vma {
* with a VMA, or the VMAs associated with an anon_vma.
* The "same_vma" list contains the anon_vma_chains linking
* all the anon_vmas associated with this VMA.
- * The "same_anon_vma" list contains the anon_vma_chains
+ * The "rb" field indexes on an interval tree the anon_vma_chains
* which link all the VMAs associated with this anon_vma.
*/
struct anon_vma_chain {
struct vm_area_struct *vma;
struct anon_vma *anon_vma;
struct list_head same_vma; /* locked by mmap_sem & page_table_lock */
- struct list_head same_anon_vma; /* locked by anon_vma->mutex */
+ struct rb_node rb; /* locked by anon_vma->mutex */
+ unsigned long rb_subtree_last;
+#ifdef CONFIG_DEBUG_VM_RB
+ unsigned long cached_vma_start, cached_vma_last;
+#endif
+};
+
+enum ttu_flags {
+ TTU_UNMAP = 0, /* unmap mode */
+ TTU_MIGRATION = 1, /* migration mode */
+ TTU_MUNLOCK = 2, /* munlock mode */
+ TTU_ACTION_MASK = 0xff,
+
+ TTU_IGNORE_MLOCK = (1 << 8), /* ignore mlock */
+ TTU_IGNORE_ACCESS = (1 << 9), /* don't age */
+ TTU_IGNORE_HWPOISON = (1 << 10),/* corrupted page is recoverable */
};
#ifdef CONFIG_MMU
@@ -120,7 +135,6 @@ void anon_vma_init(void); /* create anon_vma_cachep */
int anon_vma_prepare(struct vm_area_struct *);
void unlink_anon_vmas(struct vm_area_struct *);
int anon_vma_clone(struct vm_area_struct *, struct vm_area_struct *);
-void anon_vma_moveto_tail(struct vm_area_struct *);
int anon_vma_fork(struct vm_area_struct *, struct vm_area_struct *);
static inline void anon_vma_merge(struct vm_area_struct *vma,
@@ -161,16 +175,6 @@ int page_referenced(struct page *, int is_locked,
int page_referenced_one(struct page *, struct vm_area_struct *,
unsigned long address, unsigned int *mapcount, unsigned long *vm_flags);
-enum ttu_flags {
- TTU_UNMAP = 0, /* unmap mode */
- TTU_MIGRATION = 1, /* migration mode */
- TTU_MUNLOCK = 2, /* munlock mode */
- TTU_ACTION_MASK = 0xff,
-
- TTU_IGNORE_MLOCK = (1 << 8), /* ignore mlock */
- TTU_IGNORE_ACCESS = (1 << 9), /* don't age */
- TTU_IGNORE_HWPOISON = (1 << 10),/* corrupted page is recoverable */
-};
#define TTU_ACTION(x) ((x) & TTU_ACTION_MASK)
int try_to_unmap(struct page *, enum ttu_flags flags);