diff options
| author | Christoph Lameter <clameter@sgi.com> | 2006-01-08 01:00:54 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-08 20:12:42 -0800 |
| commit | ee27497df36823f2793212cad0997c044eb0e1eb (patch) | |
| tree | 854dded3b0277b0962b3c9a39c9cdb446654154b /mm/vmscan.c | |
| parent | 1480a540c98525640174a7eadd712378fcd6fd63 (diff) | |
| download | lwn-ee27497df36823f2793212cad0997c044eb0e1eb.tar.gz lwn-ee27497df36823f2793212cad0997c044eb0e1eb.zip | |
[PATCH] SwapMig: Drop unused pages immediately
Drop unused pages immediately
If a page is encountered that is only referenced by the migration code then
there is no reason to swap or migrate the page. Release the page by calling
move_to_lru().
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 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 5393b093a87b..73ba4046ed27 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -689,6 +689,11 @@ redo: list_for_each_entry_safe(page, page2, l, lru) { cond_resched(); + if (page_count(page) == 1) { + /* page was freed from under us. So we are done. */ + move_to_lru(page); + continue; + } /* * Skip locked pages during the first two passes to give the * functions holding the lock time to release the page. Later we |