From: Mel Gorman <mgorman@suse.de>
To: Zdenek Kabelac <zkabelac@redhat.com>
Cc: Seth Jennings <sjenning@linux.vnet.ibm.com>,
Jiri Slaby <jslaby@suse.cz>,
Valdis.Kletnieks@vt.edu, Jiri Slaby <jirislaby@gmail.com>,
linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Rik van Riel <riel@redhat.com>,
Robert Jennings <rcj@linux.vnet.ibm.com>
Subject: Re: kswapd0: excessive CPU usage
Date: Fri, 9 Nov 2012 09:06:35 +0000 [thread overview]
Message-ID: <20121109090635.GG8218@suse.de> (raw)
In-Reply-To: <509CB9D1.6060704@redhat.com>
On Fri, Nov 09, 2012 at 09:07:45AM +0100, Zdenek Kabelac wrote:
> >fe2c2a106663130a5ab45cb0e3414b52df2fff0c is the first bad commit
> >commit fe2c2a106663130a5ab45cb0e3414b52df2fff0c
> >Author: Rik van Riel <riel@redhat.com>
> >Date: Wed Mar 21 16:33:51 2012 -0700
> >
> > vmscan: reclaim at order 0 when compaction is enabled
> >...
> >
> >This is plausible since the issue seems to be in the kswapd + compaction
> >realm. I've yet to figure out exactly what about this commit results in
> >kswapd spinning.
> >
> >I would be interested if someone can confirm this finding.
> >
> >--
> >Seth
> >
>
>
> On my system 3.7-rc4 the problem seems to be effectively solved by
> revert patch: https://lkml.org/lkml/2012/11/5/308
>
Ok, while there is still a question on whether it's enough I think it's
sensible to at least start with the obvious one.
Thanks very much.
--
Mel Gorman
SUSE Labs
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next prev parent reply other threads:[~2012-11-09 9:06 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-11 8:52 kswapd0: wxcessive CPU usage Jiri Slaby
2012-10-11 13:44 ` Valdis.Kletnieks
2012-10-11 15:34 ` Jiri Slaby
2012-10-11 17:56 ` Valdis.Kletnieks
2012-10-11 17:59 ` Jiri Slaby
2012-10-11 18:19 ` Valdis.Kletnieks
2012-10-11 22:08 ` kswapd0: excessive " Jiri Slaby
2012-10-12 12:37 ` Jiri Slaby
2012-10-12 13:57 ` Mel Gorman
2012-10-15 9:54 ` Jiri Slaby
2012-10-15 11:09 ` Mel Gorman
2012-10-29 10:52 ` Thorsten Leemhuis
2012-10-30 19:18 ` Mel Gorman
2012-10-31 11:25 ` Thorsten Leemhuis
2012-10-31 15:04 ` Mel Gorman
2012-11-04 16:36 ` Rik van Riel
2012-11-02 10:44 ` Zdenek Kabelac
2012-11-02 10:53 ` Jiri Slaby
2012-11-02 19:45 ` Jiri Slaby
2012-11-04 11:26 ` Zdenek Kabelac
2012-11-05 14:24 ` [PATCH] Revert "mm: vmscan: scale number of pages reclaimed by reclaim/compaction based on failures" Mel Gorman
2012-11-06 10:15 ` Johannes Hirte
2012-11-09 8:36 ` Mel Gorman
2012-11-14 21:43 ` Johannes Hirte
2012-11-09 9:12 ` Mel Gorman
2012-11-09 4:22 ` kswapd0: excessive CPU usage Seth Jennings
2012-11-09 8:07 ` Zdenek Kabelac
2012-11-09 9:06 ` Mel Gorman [this message]
2012-11-11 9:13 ` Zdenek Kabelac
2012-11-12 11:37 ` [PATCH] Revert "mm: remove __GFP_NO_KSWAPD" Mel Gorman
2012-11-16 19:14 ` Josh Boyer
2012-11-16 19:51 ` Andrew Morton
2012-11-20 1:43 ` Valdis.Kletnieks
2012-11-16 20:06 ` Mel Gorman
2012-11-20 15:38 ` Josh Boyer
2012-11-20 16:13 ` Bruno Wolff III
2012-11-20 17:43 ` Thorsten Leemhuis
2012-11-23 15:20 ` Thorsten Leemhuis
2012-11-27 11:12 ` Mel Gorman
2012-11-21 15:08 ` Mel Gorman
2012-11-20 9:18 ` Glauber Costa
2012-11-20 20:18 ` Andrew Morton
2012-11-21 8:30 ` Glauber Costa
2012-11-12 12:19 ` kswapd0: excessive CPU usage Mel Gorman
2012-11-12 13:13 ` Zdenek Kabelac
2012-11-12 13:31 ` Mel Gorman
2012-11-12 14:50 ` Zdenek Kabelac
2012-11-18 19:00 ` Zdenek Kabelac
2012-11-18 19:07 ` Jiri Slaby
2012-11-09 8:40 ` Mel Gorman
2012-10-11 22:14 ` kswapd0: wxcessive " Andrew Morton
2012-10-11 22:26 ` Jiri Slaby
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