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Date: Thu, 27 Jun 2013 13:41:20 -0700 (PDT)
From: David Rientjes <rientjes@google.com>
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To: Roman Gushchin <klamm@yandex-team.ru>
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Subject: Re: [PATCH] slub: Avoid direct compaction if possible
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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.