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Subject: Re: OOM killer changes
References: <d8116023-dcd4-8763-af77-f2889f84cdb6@Quantum.com>
 <20160801200926.GF31957@dhcp22.suse.cz>
 <3c022d92-9c96-9022-8496-aa8738fb7358@quantum.com>
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 <27bd5116-f489-252c-f257-97be00786629@Quantum.com>
 <20160802071010.GB12403@dhcp22.suse.cz>
 <ccad54a2-be1e-44cf-b9c8-d6b34af4901d@quantum.com>
 <6cb37d4a-d2dd-6c2f-a65d-51474103bf86@Quantum.com>
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 <CAAmzW4M0gmhn1Nub=kB-4gfxviCunmWYEMhj-uVfX+k5pVtmeA@mail.gmail.com>
From: Ralf-Peter Rohbeck <Ralf-Peter.Rohbeck@quantum.com>
Message-ID: <d26d6f3a-e6be-4bf2-151f-f585aa5fdfb7@Quantum.com>
Date: Wed, 17 Aug 2016 02:21:30 -0700
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To: Joonsoo Kim <js1304@gmail.com>, Vlastimil Babka <vbabka@suse.cz>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>, Michal Hocko <mhocko@suse.cz>, "linux-mm@kvack.org" <linux-mm@kvack.org>

On 17.08.2016 01:16, Joonsoo Kim wrote:
>
> Free scanner start at 0x27fe00 but actual scan happens at 0x186a00.
> And, although log is snipped, compaction fails because it doesn't find
> any freepage.
>
> It skips half of pageblocks in that zone. It would be due to
> migratetype or skipbit.
> Both Vlastimil's recent patches and my work-around should be applied to solve
> this problem.
>
> Other part of trace looks like that my work-around isn't applied.
> Could you confirm
> that?
>
> Thanks.
Your patch was in my last 4.7 run with the output in 
OOM_4.7.0_p3.tar.bz2 but not in _p2.

Ralf-Peter

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