linux-kernel - Re: [PATCH] mm/page_alloc: prevent merging between isolated and other pageblocks

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Message-ID: <56F28E35.1080107@suse.cz>
Date:	Wed, 23 Mar 2016 13:38:13 +0100
From:	Vlastimil Babka <vbabka@...e.cz>
To:	Hanjun Guo <guohanjun@...wei.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Leizhen <thunder.leizhen@...wei.com>,
	Sasha Levin <sasha.levin@...cle.com>,
	qiuxishi <qiuxishi@...wei.com>,
	Catalin Marinas <Catalin.Marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Arnd Bergmann <arnd@...db.de>,
	dingtinahong <dingtianhong@...wei.com>, chenjie6@...wei.com,
	Lucas Stach <l.stach@...gutronix.de>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	Laura Abbott <labbott@...hat.com>,
	Mel Gorman <mgorman@...hsingularity.net>,
	Michal Nazarewicz <mina86@...a86.com>,
	Minchan Kim <minchan@...nel.org>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	stable@...r.kernel.org,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	Zhang Yanfei <zhangyanfei@...fujitsu.com>
Subject: Re: [PATCH] mm/page_alloc: prevent merging between isolated and other
 pageblocks

On 03/23/2016 12:38 PM, Hanjun Guo wrote:
> On 2016/3/23 17:40, Vlastimil Babka wrote:
>> Fixes: 3c605096d315 ("mm/page_alloc: restrict max order of merging on isolated pageblock")
>> Link: https://lkml.org/lkml/2016/3/2/280
>> Reported-by: Hanjun Guo <guohanjun@...wei.com>
>
> With the same stress test case (alloc/free cma) running for more than
> one hour, the bug I reported is gone.
>
> Tested-by: Hanjun Guo <guohanjun@...wei.com>

I wanted to add that, but forgot. Thanks!
I also forgot to transfer:

Acked-by: Joonsoo Kim <iamjoonsoo.kim@....com>

> Thanks for debugging!
> Hanjun
>