[BUGFIX][PATCH] fix wrong lru rotate back at lumpty reclaim

KAMEZAWA Hiroyuki
2009-06-09T08:46:29Z

From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>

In lumpty reclaim, "cursor_page" is found just by pfn. Then, we don't know
from which LRU "cursor" page came from. Then, putback it to "src" list is BUG.
Just leave it as it is.
(And I think rotate here is overkilling even if "src" is correct.)

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
---
mm/vmscan.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

Index: mmotm-2.6.30-Jun4/mm/vmscan.c
===================================================================
--- mmotm-2.6.30-Jun4.orig/mm/vmscan.c
+++ mmotm-2.6.30-Jun4/mm/vmscan.c
@@ -940,10 +940,9 @@ static unsigned long isolate_lru_pages(u
nr_taken++;
scan++;
break;
-
case -EBUSY:
- /* else it is being freed elsewhere */
- list_move(&cursor_page->lru, src);
+ /* Do nothing because we don't know where
+ cusrsor_page comes from */
default:
break; /* ! on LRU or wrong list */
}