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[PATCH] Direct Migration V9: remove_from_swap() to remove swap ptes

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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>
This commit is contained in:
Christoph Lameter 2006-02-01 03:05:39 -08:00 • committed by Linus Torvalds
commit a3351e525e
5 changed files with 49 additions and 0 deletions
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include/linux/swap.h
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@ -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;