From: Mel Gorman <mgorman@suse.de>
To: Jan Kara <jack@suse.cz>
Cc: colin.king@canonical.com,
James Bottomley <James.Bottomley@suse.de>,
Chris Mason <chris.mason@oracle.com>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-ext4 <linux-ext4@vger.kernel.org>,
mgorman@novell.com
Subject: Re: [BUG] fatal hang untarring 90GB file, possibly writeback related.
Date: Thu, 28 Apr 2011 15:07:25 +0100 [thread overview]
Message-ID: <20110428140725.GX4658@suse.de> (raw)
In-Reply-To: <20110428135228.GC1696@quack.suse.cz>
On Thu, Apr 28, 2011 at 03:52:28PM +0200, Jan Kara wrote:
> On Thu 28-04-11 12:36:30, Colin Ian King wrote:
> > One more data point to add, I've been looking at an identical issue when
> > copying large amounts of data. I bisected this - and the lockups occur
> > with commit
> > 3e7d344970673c5334cf7b5bb27c8c0942b06126 - before that I don't see the
> > issue. With this commit, my file copy test locks up after ~8-10
> > iterations, before this commit I can copy > 100 times and don't see the
> > lockup.
> Adding Mel to CC, I guess he'll be interested. Mel, it seems this commit
> of yours causes kswapd on non-preempt kernels spin for a *long* time...
>
I'm still thinking about the traces which do not point the finger
directly at compaction per-se but it's possible that the change means
kswapd is not reclaiming like it should be.
To test this theory, does applying
[d527caf2: mm: compaction: prevent kswapd compacting memory to reduce
CPU usage] help?
--
Mel Gorman
SUSE Labs
WARNING: multiple messages have this Message-ID (diff)
From: Mel Gorman <mgorman@suse.de>
To: Jan Kara <jack@suse.cz>
Cc: colin.king@canonical.com,
James Bottomley <James.Bottomley@suse.de>,
Chris Mason <chris.mason@oracle.com>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-ext4 <linux-ext4@vger.kernel.org>,
mgorman@novell.com
Subject: Re: [BUG] fatal hang untarring 90GB file, possibly writeback related.
Date: Thu, 28 Apr 2011 15:07:25 +0100 [thread overview]
Message-ID: <20110428140725.GX4658@suse.de> (raw)
In-Reply-To: <20110428135228.GC1696@quack.suse.cz>
On Thu, Apr 28, 2011 at 03:52:28PM +0200, Jan Kara wrote:
> On Thu 28-04-11 12:36:30, Colin Ian King wrote:
> > One more data point to add, I've been looking at an identical issue when
> > copying large amounts of data. I bisected this - and the lockups occur
> > with commit
> > 3e7d344970673c5334cf7b5bb27c8c0942b06126 - before that I don't see the
> > issue. With this commit, my file copy test locks up after ~8-10
> > iterations, before this commit I can copy > 100 times and don't see the
> > lockup.
> Adding Mel to CC, I guess he'll be interested. Mel, it seems this commit
> of yours causes kswapd on non-preempt kernels spin for a *long* time...
>
I'm still thinking about the traces which do not point the finger
directly at compaction per-se but it's possible that the change means
kswapd is not reclaiming like it should be.
To test this theory, does applying
[d527caf2: mm: compaction: prevent kswapd compacting memory to reduce
CPU usage] help?
--
Mel Gorman
SUSE Labs
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next prev parent reply other threads:[~2011-04-28 14:07 UTC|newest]
Thread overview: 135+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-27 16:09 [BUG] fatal hang untarring 90GB file, possibly writeback related James Bottomley
2011-04-27 16:09 ` James Bottomley
2011-04-27 16:33 ` Chris Mason
2011-04-27 16:33 ` Chris Mason
2011-04-27 16:50 ` James Bottomley
2011-04-27 16:50 ` James Bottomley
2011-04-27 16:54 ` Chris Mason
2011-04-27 16:54 ` Chris Mason
2011-04-27 17:21 ` James Bottomley
2011-04-27 17:21 ` James Bottomley
2011-04-27 17:34 ` Chris Mason
2011-04-27 17:34 ` Chris Mason
2011-04-27 17:50 ` James Bottomley
2011-04-27 17:50 ` James Bottomley
2011-04-27 18:25 ` Colin Ian King
2011-04-27 18:25 ` Colin Ian King
2011-04-28 15:57 ` James Bottomley
2011-04-28 15:57 ` James Bottomley
2011-04-27 20:05 ` James Bottomley
2011-04-27 20:05 ` James Bottomley
2011-04-28 11:36 ` Colin Ian King
2011-04-28 11:36 ` Colin Ian King
2011-04-28 12:29 ` Chris Mason
2011-04-28 12:29 ` Chris Mason
2011-04-28 13:42 ` Colin Ian King
2011-04-28 13:42 ` Colin Ian King
2011-04-28 13:45 ` Chris Mason
2011-04-28 13:45 ` Chris Mason
2011-04-28 14:01 ` Colin Ian King
2011-04-28 14:04 ` Chris Mason
2011-04-28 14:04 ` Chris Mason
2011-04-28 15:23 ` Colin Ian King
2011-04-28 14:25 ` Jan Kara
2011-04-28 14:25 ` Jan Kara
2011-04-28 14:33 ` Jan Kara
2011-04-28 14:33 ` Jan Kara
2011-04-28 14:58 ` Colin Ian King
2011-04-28 22:40 ` Jan Kara
2011-04-28 22:40 ` Jan Kara
2011-04-28 22:44 ` James Bottomley
2011-04-28 22:44 ` James Bottomley
2011-05-03 18:55 ` Colin Ian King
2011-05-03 18:55 ` Colin Ian King
2011-04-28 16:11 ` James Bottomley
2011-04-28 16:11 ` James Bottomley
2011-04-28 14:49 ` James Bottomley
2011-04-28 14:49 ` James Bottomley
2011-04-28 13:52 ` Jan Kara
2011-04-28 13:52 ` Jan Kara
2011-04-28 14:07 ` Mel Gorman [this message]
2011-04-28 14:07 ` Mel Gorman
2011-04-28 14:25 ` James Bottomley
2011-04-28 14:25 ` James Bottomley
2011-04-28 15:08 ` Mel Gorman
2011-04-28 15:08 ` Mel Gorman
2011-04-28 16:01 ` James Bottomley
2011-04-28 16:01 ` James Bottomley
2011-04-28 16:50 ` James Bottomley
2011-04-28 16:50 ` James Bottomley
2011-04-28 16:56 ` James Bottomley
2011-04-28 16:56 ` James Bottomley
2011-04-28 17:18 ` Mel Gorman
2011-04-28 17:18 ` Mel Gorman
2011-04-28 18:30 ` James Bottomley
2011-04-28 18:30 ` James Bottomley
2011-04-28 19:21 ` Mel Gorman
2011-04-28 19:21 ` Mel Gorman
2011-04-28 19:59 ` James Bottomley
2011-04-28 19:59 ` James Bottomley
2011-04-28 20:27 ` Mel Gorman
2011-04-28 20:27 ` Mel Gorman
2011-04-29 15:02 ` James Bottomley
2011-04-29 15:02 ` James Bottomley
2011-04-28 21:12 ` James Bottomley
2011-04-28 21:12 ` James Bottomley
2011-04-28 22:43 ` James Bottomley
2011-04-28 22:43 ` James Bottomley
2011-05-03 9:13 ` Mel Gorman
2011-05-03 9:13 ` Mel Gorman
2011-05-03 14:13 ` James Bottomley
2011-05-03 14:13 ` James Bottomley
2011-05-03 14:22 ` James Bottomley
2011-05-06 7:42 ` Mel Gorman
2011-05-06 7:42 ` Mel Gorman
2011-05-06 8:07 ` Mel Gorman
2011-05-09 18:16 ` James Bottomley
2011-05-09 18:16 ` James Bottomley
2011-05-10 10:21 ` Mel Gorman
2011-05-10 10:21 ` Mel Gorman
2011-05-10 10:33 ` Pekka Enberg
2011-05-10 10:33 ` Pekka Enberg
2011-05-10 14:01 ` James Bottomley
2011-05-10 14:01 ` James Bottomley
2011-05-10 14:35 ` Mel Gorman
2011-05-10 14:35 ` Mel Gorman
2011-05-10 15:29 ` James Bottomley
2011-05-10 15:29 ` James Bottomley
2011-05-10 15:57 ` James Bottomley
2011-05-10 15:57 ` James Bottomley
2011-05-10 17:05 ` James Bottomley
2011-05-10 17:05 ` James Bottomley
2011-05-10 17:17 ` Mel Gorman
2011-05-10 17:17 ` Mel Gorman
2011-05-10 17:29 ` James Bottomley
2011-05-10 17:29 ` James Bottomley
2011-05-10 21:08 ` Raghavendra D Prabhu
2011-05-11 9:16 ` Mel Gorman
2011-05-11 9:16 ` Mel Gorman
2011-05-06 11:42 ` Mel Gorman
2011-05-06 11:42 ` Mel Gorman
2011-05-06 15:44 ` Mel Gorman
2011-05-06 15:44 ` Mel Gorman
2011-05-06 19:14 ` James Bottomley
2011-05-06 19:14 ` James Bottomley
2011-05-06 19:37 ` Mel Gorman
2011-05-06 19:37 ` Mel Gorman
2011-05-10 5:37 ` Colin Ian King
2011-05-10 5:37 ` Colin Ian King
2011-05-06 15:58 ` James Bottomley
2011-05-03 9:54 ` Colin Ian King
2011-05-03 9:54 ` Colin Ian King
2011-04-28 17:10 ` Colin Ian King
2011-04-28 17:10 ` Colin Ian King
2011-04-28 0:37 ` Dave Chinner
2011-04-28 0:37 ` Dave Chinner
2011-04-29 10:23 ` Sedat Dilek
2011-04-29 10:23 ` Sedat Dilek
2011-04-29 15:37 ` James Bottomley
2011-04-29 15:37 ` James Bottomley
2011-04-29 16:31 ` James Bottomley
2011-04-29 16:31 ` James Bottomley
2011-04-29 18:02 ` James Bottomley
2011-04-29 18:02 ` James Bottomley
2011-05-02 20:04 ` James Bottomley
2011-05-02 20:04 ` James Bottomley
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