From: Andrea Arcangeli <aarcange@redhat.com>
To: Michal Hocko <mhocko@suse.cz>
Cc: Greg Thelen <gthelen@google.com>, linux-mm@kvack.org
Subject: Re: [LSF/MM TOPIC ATTEND]
Date: Wed, 14 Jan 2015 22:27:45 +0100 [thread overview]
Message-ID: <20150114212745.GQ6103@redhat.com> (raw)
In-Reply-To: <20150107142804.GD16553@dhcp22.suse.cz>
Hello everyone,
On Wed, Jan 07, 2015 at 03:28:04PM +0100, Michal Hocko wrote:
> Instead we shouldn't pretend that GFP_KERNEL is basically GFP_NOFAIL.
> The question is how to get there without too many regressions IMHO.
> Or maybe we should simply bite a bullet and don't be cowards and simply
> deal with bugs as they come. If something really cannot deal with the
> failure it should tell that by a proper flag.
Not related to memcg but related to GFP_NOFAIL behavior, a couple of
months ago while stress testing some code I've been working on, I run
into several OOM livelocks which may be the same you're reporting here
and I reliably fixed those (at least for my load) so I could keep
going with my work. I didn't try to submit these changes yet, but this
discussion rings a bell... so I'm sharing my changes below in this
thread in case it may help:
http://git.kernel.org/cgit/linux/kernel/git/andrea/aa.git/commit/?id=00e91f97df9861454f7e0701944d7de2c382ffb9
http://git.kernel.org/cgit/linux/kernel/git/andrea/aa.git/commit/?id=a0fcf2323b2e4cffd750c1abc1d2c138acdefcc8
http://git.kernel.org/cgit/linux/kernel/git/andrea/aa.git/commit/?id=798b7f9d549664f8c0007c6416a2568eedd75d6a
Thanks,
Andrea
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next prev parent reply other threads:[~2015-01-14 21:27 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-06 16:14 [LSF/MM TOPIC ATTEND] Michal Hocko
2015-01-06 23:27 ` Greg Thelen
2015-01-07 14:28 ` Michal Hocko
2015-01-07 18:54 ` Greg Thelen
2015-01-07 19:00 ` Greg Thelen
2015-01-14 21:27 ` Andrea Arcangeli [this message]
2015-01-15 14:06 ` Michal Hocko
2015-01-15 20:58 ` Andrea Arcangeli
2015-01-07 8:58 ` Vladimir Davydov
2015-01-07 14:38 ` Michal Hocko
2015-01-08 8:33 ` Vladimir Davydov
2015-01-08 9:09 ` Michal Hocko
2015-02-02 8:37 ` [LSF/MM TOPIC ATTEND] - THP benefits Vlastimil Babka
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