From: Andrew Morton <akpm@linux-foundation.org>
To: Minchan Kim <minchan@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Vlastimil Babka <vbabka@suse.cz>,
dri-devel@lists.freedesktop.org, Hugh Dickins <hughd@google.com>,
John Einar Reitan <john.reitan@foss.arm.com>,
Jonathan Corbet <corbet@lwn.net>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Konstantin Khlebnikov <koct9i@gmail.com>,
Mel Gorman <mgorman@suse.de>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
Rafael Aquini <aquini@redhat.com>, Rik van Riel <riel@redhat.com>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
virtualization@lists.linux-foundation.org,
Gioh Kim <gi-oh.kim@profitbricks.com>,
Chan Gyun Jeong <chan.jeong@lge.com>,
Sangseok Lee <sangseok.lee@lge.com>,
Kyeongdon Kim <kyeongdon.kim@lge.com>,
Chulmin Kim <cmlaika.kim@samsung.com>
Subject: Re: [PATCH v4 00/13] Support non-lru page migration
Date: Wed, 27 Apr 2016 13:20:35 -0700 [thread overview]
Message-ID: <20160427132035.e96f99f3420c8fb0020b0fc4@linux-foundation.org> (raw)
In-Reply-To: <1461743305-19970-1-git-send-email-minchan@kernel.org>
On Wed, 27 Apr 2016 16:48:13 +0900 Minchan Kim <minchan@kernel.org> wrote:
> Recently, I got many reports about perfermance degradation in embedded
> system(Android mobile phone, webOS TV and so on) and easy fork fail.
>
> The problem was fragmentation caused by zram and GPU driver mainly.
> With memory pressure, their pages were spread out all of pageblock and
> it cannot be migrated with current compaction algorithm which supports
> only LRU pages. In the end, compaction cannot work well so reclaimer
> shrinks all of working set pages. It made system very slow and even to
> fail to fork easily which requires order-[2 or 3] allocations.
>
> Other pain point is that they cannot use CMA memory space so when OOM
> kill happens, I can see many free pages in CMA area, which is not
> memory efficient. In our product which has big CMA memory, it reclaims
> zones too exccessively to allocate GPU and zram page although there are
> lots of free space in CMA so system becomes very slow easily.
>
> To solve these problem, this patch tries to add facility to migrate
> non-lru pages via introducing new functions and page flags to help
> migration.
I'm seeing some rejects here against Mel's changes and our patch
bandwidth is getting waaay way ahead of our review bandwidth. So I
think I'll loadshed this patchset at this time, sorry.
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next prev parent reply other threads:[~2016-04-27 20:20 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-27 7:48 Minchan Kim
2016-04-27 7:48 ` [PATCH v4 01/12] mm: use put_page to free page instead of putback_lru_page Minchan Kim
2016-04-27 7:48 ` [PATCH v4 02/12] mm: migrate: support non-lru movable page migration Minchan Kim
2016-04-27 7:48 ` [PATCH v4 03/12] mm: balloon: use general non-lru movable page feature Minchan Kim
2016-04-27 7:48 ` [PATCH v4 04/12] zsmalloc: keep max_object in size_class Minchan Kim
2016-04-27 7:48 ` [PATCH v4 05/12] zsmalloc: use bit_spin_lock Minchan Kim
2016-04-27 7:48 ` [PATCH v4 06/12] zsmalloc: use accessor Minchan Kim
2016-04-27 7:48 ` [PATCH v4 07/12] zsmalloc: factor page chain functionality out Minchan Kim
2016-04-27 7:48 ` [PATCH v4 08/12] zsmalloc: introduce zspage structure Minchan Kim
2016-04-27 7:48 ` [PATCH v4 09/12] zsmalloc: separate free_zspage from putback_zspage Minchan Kim
2016-04-27 7:48 ` [PATCH v4 10/12] zsmalloc: use freeobj for index Minchan Kim
2016-04-27 7:48 ` [PATCH v4 11/12] zsmalloc: page migration support Minchan Kim
2016-05-02 23:33 ` Chulmin Kim
2016-05-03 0:43 ` Minchan Kim
2016-05-03 1:42 ` Chulmin Kim
2016-05-03 1:58 ` Minchan Kim
2016-05-03 1:43 ` Minchan Kim
2016-04-27 7:48 ` [PATCH v4 12/12] zram: use __GFP_MOVABLE for memory allocation Minchan Kim
2016-04-27 20:20 ` Andrew Morton [this message]
2016-04-27 23:54 ` [PATCH v4 00/13] Support non-lru page migration Minchan Kim
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