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authorChristoph Lameter <clameter@sgi.com>2006-02-01 03:05:39 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-01 08:53:16 -0800
commita3351e525e4768c29aa5d22ef59b5b38e0361e53 (patch)
tree457ab54f402b471c5158e8b361d059e88ab8cd62 /include
parenta48d07afdf18212de22b959715b16793c5a6e57a (diff)
[PATCH] Direct Migration V9: remove_from_swap() to remove swap ptes
Add remove_from_swap remove_from_swap() allows the restoration of the pte entries that existed before page migration occurred for anonymous pages by walking the reverse maps. This reduces swap use and establishes regular pte's without the need for page faults. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/rmap.h1
-rw-r--r--include/linux/swap.h1
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index 0f1ea2d6ed8..d6b9bcd1384 100644
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -92,6 +92,7 @@ static inline void page_dup_rmap(struct page *page)
*/
int page_referenced(struct page *, int is_locked);
int try_to_unmap(struct page *, int ignore_refs);
+void remove_from_swap(struct page *page);
/*
* Called from mm/filemap_xip.c to unmap empty zero page
diff --git a/include/linux/swap.h b/include/linux/swap.h
index d359fc02243..229b6d04b4b 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -248,6 +248,7 @@ extern int remove_exclusive_swap_page(struct page *);
struct backing_dev_info;
extern spinlock_t swap_lock;
+extern int remove_vma_swap(struct vm_area_struct *vma, struct page *page);
/* linux/mm/thrash.c */
extern struct mm_struct * swap_token_mm;