From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx117.postini.com [74.125.245.117]) by kanga.kvack.org (Postfix) with SMTP id 5D1DC6B0032 for ; Thu, 27 Jun 2013 16:41:23 -0400 (EDT) Received: by mail-pa0-f49.google.com with SMTP id ld11so1535911pab.22 for ; Thu, 27 Jun 2013 13:41:22 -0700 (PDT) Date: Thu, 27 Jun 2013 13:41:20 -0700 (PDT) From: David Rientjes Subject: Re: [PATCH] slub: Avoid direct compaction if possible In-Reply-To: <51CBFC95.9070002@yandex-team.ru> Message-ID: References: <51BB1802.8050108@yandex-team.ru> <0000013f4319cb46-a5a3de58-1207-4037-ae39-574b58135ea2-000000@email.amazonses.com> <51BF024F.2080609@yandex-team.ru> <20130617142715.GB8853@dhcp22.suse.cz> <51BF230E.8050904@yandex-team.ru> <51CBFC95.9070002@yandex-team.ru> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Roman Gushchin Cc: Michal Hocko , Christoph Lameter , penberg@kernel.org, mpm@selenic.com, akpm@linux-foundation.org, mgorman@suse.de, glommer@parallels.com, hannes@cmpxchg.org, minchan@kernel.org, jiang.liu@huawei.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org On Thu, 27 Jun 2013, Roman Gushchin wrote: > > They certainly aren't enough, the kernel you're running suffers from a > > couple different memory compaction issues that were fixed in 3.7. I > > couldn't sympathize with your situation more, I faced the same issue > > because of thp and not slub (we use slab). > > > > > I'll try to reproduce the issue on raw 3.9. > > > > > I can't reproduce the issue on 3.9. > It seems that compaction fixes in 3.7 solve the problem. > Yeah, we had significant problems with memory compaction in 3.3 and 3.4 kernels, so if you need to run with such a kernel you'll want to backport the listed commits. I'm not sure we could get such invasive changes into a stable release, unfortunately. -- 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