From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 4 Jul 2008 18:02:26 +0900 From: KAMEZAWA Hiroyuki Subject: memcg: lru scan fix (Was: 2.6.26-rc8-mm1 Message-Id: <20080704180226.46436432.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20080703020236.adaa51fa.akpm@linux-foundation.org> References: <20080703020236.adaa51fa.akpm@linux-foundation.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, "kosaki.motohiro@jp.fujitsu.com" , "riel@redhat.com" List-ID: Since rc5-mm3, memcg easily goes into OOM when limit was low. This is a fix to split-lru to fix OOM. == Under memcg, active anon tend not to go to inactive anon. This will cause OOM in memcg easily when tons of anon was used at once. This check was lacked in split-lru. Signed-off-by:KAMEZAWA Hiroyuki Index: test-2.6.26-rc8-mm1/mm/vmscan.c =================================================================== --- test-2.6.26-rc8-mm1.orig/mm/vmscan.c +++ test-2.6.26-rc8-mm1/mm/vmscan.c @@ -1501,6 +1501,8 @@ static unsigned long shrink_zone(int pri */ if (scan_global_lru(sc) && inactive_anon_is_low(zone)) shrink_active_list(SWAP_CLUSTER_MAX, zone, sc, priority, 0); + else if (!scan_global_lru(sc)) + shrink_active_list(SWAP_CLUSTER_MAX, zone, sc, priority, 0); throttle_vm_writeout(sc->gfp_mask); return nr_reclaimed; -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org