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authorChristoph Lameter <clameter@engr.sgi.com>2006-02-01 03:05:32 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-01 08:53:15 -0800
commitaa3f18b3391ac305baa01faead3fdf9147daf54b (patch)
tree7e5e1f300058279bafdf7b576e072ced3e5f45d3
parent4e6a510a74145585f4111d60d1b5fd450d795dd8 (diff)
[PATCH] zone_reclaim: do not unmap file backed pages
zone_reclaim should leave that to the real swapper. We are only interested in evicting unmapped pages. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--mm/vmscan.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 61ca0097c83..8277f93148b 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -477,6 +477,12 @@ static int shrink_list(struct list_head *page_list, struct scan_control *sc)
* processes. Try to unmap it here.
*/
if (page_mapped(page) && mapping) {
+ /*
+ * No unmapping if we do not swap
+ */
+ if (!sc->may_swap)
+ goto keep_locked;
+
switch (try_to_unmap(page)) {
case SWAP_FAIL:
goto activate_locked;