From: Joonsoo Kim <js1304@gmail.com>
To: Michal Nazarewicz <mina86@mina86.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Rik van Riel <riel@redhat.com>, Jiang Liu <jiang.liu@huawei.com>,
Mel Gorman <mgorman@suse.de>,
Cody P Schafer <cody@linux.vnet.ibm.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@suse.cz>, Minchan Kim <minchan@kernel.org>,
Andi Kleen <ak@linux.intel.com>,
Wei Yongjun <yongjun_wei@trendmicro.com.cn>,
Tang Chen <tangchen@cn.fujitsu.com>,
Linux Memory Management List <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/7] improve robustness on handling migratetype
Date: Thu, 9 Jan 2014 23:05:04 +0900 [thread overview]
Message-ID: <CAAmzW4PyCp1Hw1ThHGZV5i1wb9494vgpDhZ4h+Gr3Q=pLOojJA@mail.gmail.com> (raw)
In-Reply-To: <xa1tha9dbk2t.fsf@mina86.com>
2014/1/9 Michal Nazarewicz <mina86@mina86.com>:
> On Thu, Jan 09 2014, Joonsoo Kim <iamjoonsoo.kim@lge.com> wrote:
>> Third, there is the problem on buddy allocator. It doesn't consider
>> migratetype when merging buddy, so pages from cma or isolate region can
>> be moved to other migratetype freelist. It makes CMA failed over and over.
>> To prevent it, the buddy allocator should consider migratetype if
>> CMA/ISOLATE is enabled.
>
> There should never be situation where a CMA page shares a pageblock (or
> a max-order page) with a non-CMA page though, so this should never be an
> issue.
Right... It never happens.
When I ported CMA region reservation code to my own code for testing,
I made a mistake. Sorry for noise.
Thanks.
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next prev parent reply other threads:[~2014-01-09 14:05 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-09 7:04 Joonsoo Kim
2014-01-09 7:04 ` [PATCH 1/7] mm/page_alloc: synchronize get/set pageblock Joonsoo Kim
2014-01-09 9:08 ` Michal Nazarewicz
2014-01-09 7:04 ` [PATCH 2/7] mm/cma: fix cma free page accounting Joonsoo Kim
2014-01-09 21:10 ` Laura Abbott
2014-01-10 8:50 ` Joonsoo Kim
2014-01-09 7:04 ` [PATCH 3/7] mm/page_alloc: move set_freepage_migratetype() to better place Joonsoo Kim
2014-01-09 7:04 ` [PATCH 4/7] mm/isolation: remove invalid check condition Joonsoo Kim
2014-01-09 7:04 ` [PATCH 5/7] mm/page_alloc: separate interface to set/get migratetype of freepage Joonsoo Kim
2014-01-09 9:18 ` Michal Nazarewicz
2014-01-09 7:04 ` [PATCH 6/7] mm/page_alloc: store freelist migratetype to the page on buddy properly Joonsoo Kim
2014-01-09 9:19 ` Michal Nazarewicz
2014-01-09 7:04 ` [PATCH 7/7] mm/page_alloc: don't merge MIGRATE_(CMA|ISOLATE) pages on buddy Joonsoo Kim
2014-01-09 9:22 ` Michal Nazarewicz
2014-01-09 9:06 ` [PATCH 0/7] improve robustness on handling migratetype Michal Nazarewicz
2014-01-09 14:05 ` Joonsoo Kim [this message]
2014-01-09 9:27 ` Mel Gorman
2014-01-10 8:48 ` Joonsoo Kim
2014-01-10 9:48 ` Mel Gorman
2014-01-13 1:57 ` Joonsoo Kim
2014-01-29 16:52 ` Vlastimil Babka
2014-01-31 15:39 ` Mel Gorman
2014-02-03 7:45 ` Joonsoo Kim
2014-02-03 9:16 ` Vlastimil Babka
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