Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752967Ab1CELpE (ORCPT ); Sat, 5 Mar 2011 06:45:04 -0500 Received: from mailhub.sw.ru ([195.214.232.25]:2287 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752524Ab1CELpB (ORCPT ); Sat, 5 Mar 2011 06:45:01 -0500 From: Andrey Vagin To: Andrew Morton Cc: Mel Gorman , KOSAKI Motohiro , avagin@openvz.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH] mm: check zone->all_unreclaimable in all_unreclaimable() Date: Sat, 5 Mar 2011 14:44:16 +0300 Message-Id: <1299325456-2687-1-git-send-email-avagin@openvz.org> X-Mailer: git-send-email 1.5.5.6 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1285 Lines: 45 Check zone->all_unreclaimable in all_unreclaimable(), otherwise the kernel may hang up, because shrink_zones() will do nothing, but all_unreclaimable() will say, that zone has reclaimable pages. do_try_to_free_pages() shrink_zones() for_each_zone if (zone->all_unreclaimable) continue if !all_unreclaimable(zonelist, sc) return 1 __alloc_pages_slowpath() retry: did_some_progress = do_try_to_free_pages(page) ... if (!page && did_some_progress) retry; Signed-off-by: Andrey Vagin --- mm/vmscan.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 6771ea7..1c056f7 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2002,6 +2002,8 @@ static bool all_unreclaimable(struct zonelist *zonelist, for_each_zone_zonelist_nodemask(zone, z, zonelist, gfp_zone(sc->gfp_mask), sc->nodemask) { + if (zone->all_unreclaimable) + continue; if (!populated_zone(zone)) continue; if (!cpuset_zone_allowed_hardwall(zone, GFP_KERNEL)) -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/