lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] Allow migration of mlocked pages

Browse Source 
Hugh clarified the role of VM_LOCKED.  So we can now implement page
migration for mlocked pages.

Allow the migration of mlocked pages.  This means that try_to_unmap must
unmap mlocked pages in the migration case.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christoph Lameter
2006-06-25 05:46:49 -07:00
committed by Linus Torvalds
parent 7b2259b3e5
commit e6a1530d69
2 changed files with 8 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
mm/migrate.c
View File

@@ -616,15 +616,13 @@ static int unmap_and_move(new_page_t get_new_page, unsigned long private,
/*
* Establish migration ptes or remove ptes
*/
if (try_to_unmap(page, 1) != SWAP_FAIL) {
if (!page_mapped(page))
rc = move_to_new_page(newpage, page);
} else
/* A vma has VM_LOCKED set -> permanent failure */
rc = -EPERM;
try_to_unmap(page, 1);
if (!page_mapped(page))
rc = move_to_new_page(newpage, page);
if (rc)
remove_migration_ptes(page, page);
unlock:
unlock_page(page);