From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754771Ab2K2PU4 (ORCPT ); Thu, 29 Nov 2012 10:20:56 -0500 Received: from cantor2.suse.de ([195.135.220.15]:51435 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754614Ab2K2PUz (ORCPT ); Thu, 29 Nov 2012 10:20:55 -0500 Date: Thu, 29 Nov 2012 15:20:51 +0000 From: Mel Gorman To: George Spelvin Cc: dave@linux.vnet.ibm.com, hannes@cmpxchg.org, jack@suse.cz, linux-kernel@vger.kernel.org, linux-mm@kvack.org, riel@redhat.com Subject: Re: 3.7-rc6 soft lockup in kswapd0 Message-ID: <20121129152051.GZ8218@suse.de> References: <20121128113920.GU8218@suse.de> <20121129145414.9415.qmail@science.horizon.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <20121129145414.9415.qmail@science.horizon.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Nov 29, 2012 at 09:54:14AM -0500, George Spelvin wrote: > Mel Gorman wrote: > > On Tue, Nov 27, 2012 at 04:25:14PM -0500, George Spelvin wrote: > >> Well, it just made it to 24 hours, > >> it did before. I'm going to wait a couple more days before declaring > >> victory, but it looks good so far. > >> > >> 19:19:10 up 1 day, 0 min, 2 users, load average: 0.15, 0.20, 0.22 > >> 21:24:05 up 1 day, 2:05, 2 users, load average: 0.25, 0.19, 0.18 > > > > Superb. The relevant patches *should* be in flight for 3.7 assuming they > > make it through the confusion of last-minute fixes. > > 14:53:54 up 2 days, 19:35, 2 users, load average: 0.20, 0.24, 0.23 > > Almost three days, when it wouldn't live overnight before. > As promised, I'm declaring victory. > > The patch that worked (on top of -rc7) was Johannes Weiner's > "mm: vmscan: fix endless loop in kswapd balancing" > that added the zone_balanced() function to mm/vmscan.c:2400. > > Thank you all very much! Excellent, thanks for getting back quickly. The necessary patches in question are sortof-in-flight but I expect they'll make it in for 3.7. If that happens, it would be very nice if you could test with 3.7 to confirm and if all goes according to plan, I'll do a backport for 3.6-stable and hopefully squash most of the THP-causes-all-and-sundry-to-go-nuts bugs. -- Mel Gorman SUSE Labs