From: Minchan Kim <minchan@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Mel Gorman <mgorman@suse.de>,
Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>,
Xishi Qiu <qiuxishi@huawei.com>,
Wen Congyang <wency@cn.fujitsu.com>,
Minchan Kim <minchan@kernel.org>
Subject: [PATCH v3 0/4] memory-hotplug: handle page race between allocation and isolation
Date: Fri, 7 Sep 2012 09:39:28 +0900 [thread overview]
Message-ID: <1346978372-17903-1-git-send-email-minchan@kernel.org> (raw)
Memory hotplug has a subtle race problem so this patchset fixes the problem
(Look at [3/3] for detail and please confirm the problem before review
other patches in this series.)
[1/4] is just clean up and help for [2/4].
[2/4] keeps the migratetype information to freed page's index field
and [3/4] uses the information.
[3/4] fixes the race problem with [2/4]'s information.
[4/4] enhance memory-hotremove operation success ratio
After applying [2/4], migratetype argument in __free_one_page
and free_one_page is redundant so we can remove it but I decide
to not touch them because it increases code size about 50 byte.
This patchset is based on mmotm-2012-09-06-16-46
Minchan Kim (4):
use get_page_migratetype instead of page_private
mm: remain migratetype in freed page
memory-hotplug: bug fix race between isolation and allocation
memory-hotplug: fix pages missed by race rather than failing
include/linux/mm.h | 12 ++++++++++++
include/linux/page-isolation.h | 4 ++++
mm/page_alloc.c | 19 ++++++++++++-------
mm/page_isolation.c | 18 ++++++++++++++++--
4 files changed, 44 insertions(+), 9 deletions(-)
--
1.7.9.5
next reply other threads:[~2012-09-07 0:38 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-07 0:39 Minchan Kim [this message]
2012-09-07 0:39 ` [PATCH v3 1/4] use get_freepage_migratetype instead of page_private Minchan Kim
2012-09-07 3:50 ` Yasuaki Ishimatsu
2012-09-07 0:39 ` [PATCH v3 2/4] mm: remain migratetype in freed page Minchan Kim
2012-09-07 3:51 ` Yasuaki Ishimatsu
2012-09-07 0:39 ` [PATCH v3 3/4] memory-hotplug: bug fix race between isolation and allocation Minchan Kim
2012-09-07 3:52 ` Yasuaki Ishimatsu
2012-09-07 0:39 ` [PATCH v3 4/4] memory-hotplug: fix pages missed by race rather than failng Minchan Kim
2012-09-07 0:48 ` Kamezawa Hiroyuki
2012-09-07 9:17 ` [PATCH v3 0/4] memory-hotplug: handle page race between allocation and isolation Mel Gorman
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