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Subject: Re: Suspicious error for CMA stress test
References: <56D6F008.1050600@huawei.com> <56D79284.3030009@redhat.com>
From: Hanjun Guo <guohanjun@huawei.com>
Message-ID: <56D7D48C.6010505@huawei.com>
Date: Thu, 3 Mar 2016 14:07:08 +0800
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To: Laura Abbott <labbott@redhat.com>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@linux-foundation.org>, Sasha Levin <sasha.levin@oracle.com>, Laura Abbott <lauraa@codeaurora.org>, qiuxishi <qiuxishi@huawei.com>, Catalin Marinas <Catalin.Marinas@arm.com>, Will Deacon <will.deacon@arm.com>, Arnd Bergmann <arnd@arndb.de>, Joonsoo Kim <js1304@gmail.com>
Cc: "thunder.leizhen@huawei.com" <thunder.leizhen@huawei.com>, dingtinahong <dingtianhong@huawei.com>, chenjie6@huawei.com, "linux-mm@kvack.org" <linux-mm@kvack.org>

Hi Laura,

Thanks a lot for taking a look!

On 2016/3/3 9:25, Laura Abbott wrote:
> (cc -mm and Joonsoo Kim)
>
>
[...]
>
> I played with this a bit and can see the same problem. The sanity
> check of CmaFree < CmaTotal generally triggers in
> __move_zone_freepage_state in unset_migratetype_isolate.
> This also seems to be present as far back as v4.0 which was the
> first version to have the updated accounting from Joonsoo.

Would you mind point out the specific commit ID?

Thanks
Hanjun

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