From: Michal Hocko <mhocko@suse.cz>
To: Mel Gorman <mgorman@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Minchan Kim <minchan.kim@gmail.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Thomas Sattler <tsattler@gmx.de>,
Ury Stankevich <urykhy@gmail.com>,
Andi Kleen <andi@firstfloor.org>, linux-mm <linux-mm@kvack.org>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 4/4] mm: compaction: Abort compaction if too many pages are isolated and caller is asynchronous V2
Date: Wed, 8 Jun 2011 11:55:28 +0200 [thread overview]
Message-ID: <20110608095528.GE6742@tiehlicka.suse.cz> (raw)
In-Reply-To: <20110607162711.GO5247@suse.de>
On Tue 07-06-11 17:27:11, Mel Gorman wrote:
> Changelog since V1
> o Return COMPACT_PARTIAL when aborting due to too many isolated
> pages. As pointed out by Minchan, this is better for consistency
>
> Asynchronous compaction is used when promoting to huge pages. This is
> all very nice but if there are a number of processes in compacting
> memory, a large number of pages can be isolated. An "asynchronous"
> process can stall for long periods of time as a result with a user
> reporting that firefox can stall for 10s of seconds. This patch aborts
> asynchronous compaction if too many pages are isolated as it's better to
> fail a hugepage promotion than stall a process.
>
> [minchan.kim@gmail.com: Return COMPACT_PARTIAL for abort]
> Reported-and-tested-by: Ury Stankevich <urykhy@gmail.com>
> Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
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Michal Hocko
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Lihovarska 1060/12
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Czech Republic
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next prev parent reply other threads:[~2011-06-08 9:55 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-07 15:07 [PATCH 0/4] Fix compaction stalls due to accounting errors in isolated page accounting Mel Gorman
2011-06-07 15:07 ` [PATCH 1/4] mm: compaction: Ensure that the compaction free scanner does not move to the next zone Mel Gorman
2011-06-08 9:33 ` Michal Hocko
2011-06-07 15:07 ` [PATCH 2/4] mm: vmscan: Do not use page_count without a page pin Mel Gorman
2011-06-07 15:12 ` Minchan Kim
2011-06-08 9:38 ` Michal Hocko
2011-06-07 15:07 ` [PATCH 3/4] mm: memory-failure: Fix isolated page count during memory failure Mel Gorman
2011-06-07 15:14 ` Minchan Kim
2011-06-08 10:07 ` Michal Hocko
2011-06-08 10:11 ` Michal Hocko
2011-06-07 15:07 ` [PATCH 4/4] mm: compaction: Abort compaction if too many pages are isolated and caller is asynchronous Mel Gorman
2011-06-07 15:50 ` Minchan Kim
2011-06-07 16:26 ` Mel Gorman
2011-06-07 16:27 ` [PATCH 4/4] mm: compaction: Abort compaction if too many pages are isolated and caller is asynchronous V2 Mel Gorman
2011-06-07 16:36 ` Minchan Kim
2011-06-08 9:55 ` Michal Hocko [this message]
2011-07-17 8:52 ` [PATCH 0/4] Fix compaction stalls due to accounting errors in isolated page accounting Thomas Sattler
2011-07-19 9:16 ` Mel Gorman
2011-07-19 11:24 ` Thomas Sattler
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