From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Alexander Potapenko <glider@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>, Michal Hocko <mhocko@suse.cz>,
Linux Memory Management List <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
riel@redhat.com, David Rientjes <rientjes@google.com>,
mgorman@techsingularity.net
Subject: Re: [mmotm-2016-07-18-16-40] page allocation failure: order:2, mode:0x2000000(GFP_NOWAIT)
Date: Thu, 21 Jul 2016 01:34:27 +0300 [thread overview]
Message-ID: <20160720223427.GA22911@node.shutemov.name> (raw)
In-Reply-To: <CAG_fn=UP0169b+cTxVBhqPUfOurQNxAKne0pYSPy3a1uFvTp-g@mail.gmail.com>
On Wed, Jul 20, 2016 at 08:12:13PM +0200, Alexander Potapenko wrote:
> >>>>> It's easy to reproduce in my setup: virtual machine with some amount of
> >>>>> swap space and try allocate about the size of RAM in userspace (I used
> >>>>> usemem[1] for that).
>
> Am I understanding right that you're seeing allocation failures from
> the stack depot? How often do they happen? Are they reported under
> heavy load, or just when you boot the kernel?
As I described, it happens under memory pressure.
> Allocating with __GFP_NOWARN will help here, but I think we'd better
> figure out what's gone wrong.
> I've sent https://lkml.org/lkml/2016/7/14/566, which should reduce the
> stack depot's memory consumption, for review - can you see if the bug
> is still reproducible with that?
I was not able to trigger the failure with the same test case.
Tested with v2 of the patch.
(Links to http://lkml.kernel.org/ or other archive with message-id in url
is prefered. lkml.org is garbage)
--
Kirill A. Shutemov
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next prev parent reply other threads:[~2016-07-20 22:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-20 11:44 [mmotm-2016-07-18-16-40] page allocation failure: order:2, mode:0x2000000(GFP_NOWAIT) Kirill A. Shutemov
2016-07-20 11:53 ` Michal Hocko
2016-07-20 13:39 ` Vlastimil Babka
2016-07-20 15:19 ` Kirill A. Shutemov
2016-07-20 15:33 ` Vlastimil Babka
2016-07-20 18:12 ` Alexander Potapenko
2016-07-20 22:34 ` Kirill A. Shutemov [this message]
2016-07-21 11:33 ` Alexander Potapenko
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