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Date: Fri, 10 Feb 2012 20:36:42 +0800
Message-ID: <CAJd=RBBqGpgn=9R5-T0YOOzsQcS1L7V=T2v8upTHp8ARczZJGQ@mail.gmail.com>
Subject: Re: swap storm since kernel 3.2.x
From: Hillf Danton <dhillf@gmail.com>
To: Rik van Riel <riel@redhat.com>
Cc: Johannes Stezenbach <js@sig21.net>,
        =?UTF-8?Q?Toralf_F=C3=B6rster?= <toralf.foerster@gmx.de>,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org
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On Thu, Feb 9, 2012 at 10:06 PM, Rik van Riel <riel@redhat.com> wrote:
> On 02/09/2012 08:54 AM, Johannes Stezenbach wrote:
>>
>> On Thu, Feb 09, 2012 at 02:21:55PM +0100, Johannes Stezenbach wrote:
>>>
>>> it looks good.  Neither do I get the huge debug_objects_cache
>>> nor does it swap, after running a crosstool-ng toolchain build.
>>> Well, last time I also had one kvm -m 1G instance running.  I'll
>>> try if that triggers the issue.  So far:
>>
>>
>> The kvm produced a bunch of page allocation failures
>> on the host:
>
>
>> (repeats a few times)
>>
>> I guess that is expected with your patch?
>
>
> That is indeed why my patch series was significantly larger
> than Hillf's little test patch :)
>

Yes, Johannes did show that kswapd running purely in single
mode, without helps from compaction or lumpy, could not
meet all requests in VM core.

Thank you all
Hillf
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