From: Minchan Kim <minchan.kim@gmail.com>
To: "Arve Hjønnevåg" <arve@android.com>
Cc: Mel Gorman <mel@csn.ul.ie>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
TAO HU <tghk48@motorola.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
"Ye Yuan.Bo-A22116" <yuan-bo.ye@motorola.com>,
Chang Qing-A21550 <Qing.Chang@motorola.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] mm: Check if any page in a pageblock is reserved before marking it MIGRATE_RESERVE
Date: Tue, 6 Apr 2010 13:15:12 +0900 [thread overview]
Message-ID: <k2g28c262361004052115ie21bd036hcbdbdb7750f2942b@mail.gmail.com> (raw)
In-Reply-To: <1270523356-1728-1-git-send-email-arve@android.com>
On Tue, Apr 6, 2010 at 12:09 PM, Arve Hjønnevåg <arve@android.com> wrote:
> This fixes a problem where the first pageblock got marked MIGRATE_RESERVE even
> though it only had a few free pages. This in turn caused no contiguous memory
> to be reserved and frequent kswapd wakeups that emptied the caches to get more
> contiguous memory.
It would be better to add following your description of previous mail thread.
It can help others understand it in future.
On Fri, Apr 02, 2010 at 05:59:00PM -0700, Arve Hj?nnev?g wrote:
...
"I think this happens by default on arm. The kernel starts at offset
0x8000 to leave room for boot parameters, and in recent kernel
versions (>~2.6.26-29) this memory is freed."
--
Kind regards,
Minchan Kim
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next prev parent reply other threads:[~2010-04-06 4:15 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-01 4:05 [Question] race condition in mm/page_alloc.c regarding page->lru? TAO HU
2010-04-02 3:51 ` TAO HU
2010-04-02 5:03 ` KOSAKI Motohiro
2010-04-02 5:19 ` TAO HU
2010-04-02 9:48 ` Mel Gorman
2010-04-03 0:59 ` Arve Hjønnevåg
2010-04-04 22:45 ` KOSAKI Motohiro
2010-04-05 10:14 ` Mel Gorman
2010-04-05 10:49 ` Minchan Kim
2010-04-06 3:09 ` [PATCH] mm: Check if any page in a pageblock is reserved before marking it MIGRATE_RESERVE Arve Hjønnevåg
2010-04-06 4:15 ` Minchan Kim [this message]
2010-04-06 15:11 ` Mel Gorman
2010-04-02 5:04 ` [Question] race condition in mm/page_alloc.c regarding page->lru? KAMEZAWA Hiroyuki
2010-04-02 5:15 ` Minchan Kim
2010-04-02 7:00 ` TAO HU
2010-04-02 7:22 ` Minchan Kim
2010-04-02 5:13 ` Minchan Kim
2010-04-02 6:48 ` TAO HU
2010-04-02 7:06 ` Daniel Mack
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