From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx143.postini.com [74.125.245.143]) by kanga.kvack.org (Postfix) with SMTP id E108C6B006C for ; Tue, 13 Nov 2012 20:22:35 -0500 (EST) Date: Wed, 14 Nov 2012 02:22:34 +0100 From: Marc Duponcheel Subject: Re: [3.6 regression?] THP + migration/compaction livelock (I think) Message-ID: <20121114012234.GB8152@offline.be> Reply-To: Marc Duponcheel References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: David Rientjes Cc: Andy Lutomirski , Mel Gorman , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Marc Duponcheel Hi all, please let me know if there is are patches you want me to try. FWIW time did not stand still and I run 3.6.6 now. On 2012 Nov 13, #David Rientjes wrote: > On Tue, 13 Nov 2012, Andy Lutomirski wrote: > > > >> $ grep -E "compact_|thp_" /proc/vmstat > > >> compact_blocks_moved 8332448774 > > >> compact_pages_moved 21831286 > > >> compact_pagemigrate_failed 211260 > > >> compact_stall 13484 > > >> compact_fail 6717 > > >> compact_success 6755 > > >> thp_fault_alloc 150665 > > >> thp_fault_fallback 4270 > > >> thp_collapse_alloc 19771 > > >> thp_collapse_alloc_failed 2188 > > >> thp_split 19600 > > >> > > > > > > Two of the patches from the list provided at > > > http://marc.info/?l=linux-mm&m=135179005510688 are already in your 3.6.3 > > > kernel: > > > > > > mm: compaction: abort compaction loop if lock is contended or run too long > > > mm: compaction: acquire the zone->lock as late as possible > > > > > > and all have not made it to the 3.6 stable kernel yet, so would it be > > > possible to try with 3.7-rc5 to see if it fixes the issue? If so, it will > > > indicate that the entire series is a candidate to backport to 3.6. > > > > I'll try later on. The last time I tried to boot 3.7 on this box, it > > failed impressively (presumably due to a localmodconfig bug, but I > > haven't tracked it down yet). > > > > I'm also not sure how reliably I can reproduce this. > > > > The challenge goes out to Marc too since he reported this issue on 3.6.2 > but we haven't heard back yet on the success of the backport (although > it's probably easier to try 3.7-rc5 since there are some conflicts to > resolve). -- Marc Duponcheel Velodroomstraat 74 - 2600 Berchem - Belgium +32 (0)478 68.10.91 - marc@offline.be -- 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