From: Andrew Morton <akpm@linux-foundation.org>
To: Jiri Slaby <jslaby@suse.cz>
Cc: linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>,
Jiri Slaby <jirislaby@gmail.com>
Subject: Re: kswapd0: wxcessive CPU usage
Date: Thu, 11 Oct 2012 15:14:13 -0700 [thread overview]
Message-ID: <20121011151413.3ab58542.akpm@linux-foundation.org> (raw)
In-Reply-To: <507688CC.9000104@suse.cz>
On Thu, 11 Oct 2012 10:52:28 +0200
Jiri Slaby <jslaby@suse.cz> wrote:
> with 3.6.0-next-20121008, kswapd0 is spinning my CPU at 100% for 1
> minute or so. If I try to suspend to RAM, this trace appears:
> kswapd0 R running task 0 577 2 0x00000000
> 0000000000000000 00000000000000c0 cccccccccccccccd ffff8801c4146800
> ffff8801c4b15c88 ffffffff8116ee05 0000000000003e32 ffff8801c3a79000
> ffff8801c4b15ca8 ffffffff8116fdf8 ffff8801c480f398 ffff8801c3a79000
> Call Trace:
> [<ffffffff8116ee05>] ? put_super+0x25/0x40
> [<ffffffff8116fdd4>] ? grab_super_passive+0x24/0xa0
> [<ffffffff8116ff99>] ? prune_super+0x149/0x1b0
> [<ffffffff81131531>] ? shrink_slab+0xa1/0x2d0
> [<ffffffff8113452d>] ? kswapd+0x66d/0xb60
> [<ffffffff81133ec0>] ? try_to_free_pages+0x180/0x180
> [<ffffffff810a2770>] ? kthread+0xc0/0xd0
> [<ffffffff810a26b0>] ? kthread_create_on_node+0x130/0x130
> [<ffffffff816a6c9c>] ? ret_from_fork+0x7c/0x90
> [<ffffffff810a26b0>] ? kthread_create_on_node+0x130/0x130
Could you please do a sysrq-T a few times while it's spinning, to
confirm that this trace is consistently the culprit?
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WARNING: multiple messages have this Message-ID (diff)
From: Andrew Morton <akpm@linux-foundation.org>
To: Jiri Slaby <jslaby@suse.cz>
Cc: linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>,
Jiri Slaby <jirislaby@gmail.com>
Subject: Re: kswapd0: wxcessive CPU usage
Date: Thu, 11 Oct 2012 15:14:13 -0700 [thread overview]
Message-ID: <20121011151413.3ab58542.akpm@linux-foundation.org> (raw)
In-Reply-To: <507688CC.9000104@suse.cz>
On Thu, 11 Oct 2012 10:52:28 +0200
Jiri Slaby <jslaby@suse.cz> wrote:
> with 3.6.0-next-20121008, kswapd0 is spinning my CPU at 100% for 1
> minute or so. If I try to suspend to RAM, this trace appears:
> kswapd0 R running task 0 577 2 0x00000000
> 0000000000000000 00000000000000c0 cccccccccccccccd ffff8801c4146800
> ffff8801c4b15c88 ffffffff8116ee05 0000000000003e32 ffff8801c3a79000
> ffff8801c4b15ca8 ffffffff8116fdf8 ffff8801c480f398 ffff8801c3a79000
> Call Trace:
> [<ffffffff8116ee05>] ? put_super+0x25/0x40
> [<ffffffff8116fdd4>] ? grab_super_passive+0x24/0xa0
> [<ffffffff8116ff99>] ? prune_super+0x149/0x1b0
> [<ffffffff81131531>] ? shrink_slab+0xa1/0x2d0
> [<ffffffff8113452d>] ? kswapd+0x66d/0xb60
> [<ffffffff81133ec0>] ? try_to_free_pages+0x180/0x180
> [<ffffffff810a2770>] ? kthread+0xc0/0xd0
> [<ffffffff810a26b0>] ? kthread_create_on_node+0x130/0x130
> [<ffffffff816a6c9c>] ? ret_from_fork+0x7c/0x90
> [<ffffffff810a26b0>] ? kthread_create_on_node+0x130/0x130
Could you please do a sysrq-T a few times while it's spinning, to
confirm that this trace is consistently the culprit?
next prev parent reply other threads:[~2012-10-11 22:14 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-11 8:52 kswapd0: wxcessive CPU usage Jiri Slaby
2012-10-11 8:52 ` Jiri Slaby
2012-10-11 13:44 ` Valdis.Kletnieks
2012-10-11 15:34 ` Jiri Slaby
2012-10-11 15:34 ` Jiri Slaby
2012-10-11 17:56 ` Valdis.Kletnieks
2012-10-11 17:59 ` Jiri Slaby
2012-10-11 17:59 ` Jiri Slaby
2012-10-11 18:19 ` Valdis.Kletnieks
2012-10-11 22:08 ` kswapd0: excessive " Jiri Slaby
2012-10-11 22:08 ` Jiri Slaby
2012-10-12 12:37 ` Jiri Slaby
2012-10-12 12:37 ` Jiri Slaby
2012-10-12 13:57 ` Mel Gorman
2012-10-12 13:57 ` Mel Gorman
2012-10-15 9:54 ` Jiri Slaby
2012-10-15 9:54 ` Jiri Slaby
2012-10-15 11:09 ` Mel Gorman
2012-10-15 11:09 ` Mel Gorman
2012-10-29 10:52 ` Thorsten Leemhuis
2012-10-29 10:52 ` Thorsten Leemhuis
2012-10-30 19:18 ` Mel Gorman
2012-10-30 19:18 ` Mel Gorman
2012-10-31 11:25 ` Thorsten Leemhuis
2012-10-31 11:25 ` Thorsten Leemhuis
2012-10-31 15:04 ` Mel Gorman
2012-10-31 15:04 ` Mel Gorman
2012-11-04 16:36 ` Rik van Riel
2012-11-04 16:36 ` Rik van Riel
2012-11-02 10:44 ` Zdenek Kabelac
2012-11-02 10:44 ` Zdenek Kabelac
2012-11-02 10:53 ` Jiri Slaby
2012-11-02 10:53 ` Jiri Slaby
2012-11-02 19:45 ` Jiri Slaby
2012-11-02 19:45 ` Jiri Slaby
2012-11-04 11:26 ` Zdenek Kabelac
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
2012-11-05 14:24 ` Mel Gorman
2012-11-06 10:15 ` Johannes Hirte
2012-11-06 10:15 ` Johannes Hirte
2012-11-09 8:36 ` Mel Gorman
2012-11-09 8:36 ` Mel Gorman
2012-11-14 21:43 ` Johannes Hirte
2012-11-14 21:43 ` Johannes Hirte
2012-11-09 9:12 ` Mel Gorman
2012-11-09 9:12 ` Mel Gorman
2012-11-09 4:22 ` kswapd0: excessive CPU usage Seth Jennings
2012-11-09 4:22 ` Seth Jennings
2012-11-09 8:07 ` Zdenek Kabelac
2012-11-09 8:07 ` Zdenek Kabelac
2012-11-09 9:06 ` Mel Gorman
2012-11-09 9:06 ` Mel Gorman
2012-11-11 9:13 ` Zdenek Kabelac
2012-11-11 9:13 ` Zdenek Kabelac
2012-11-12 11:37 ` [PATCH] Revert "mm: remove __GFP_NO_KSWAPD" Mel Gorman
2012-11-12 11:37 ` Mel Gorman
2012-11-16 19:14 ` Josh Boyer
2012-11-16 19:14 ` Josh Boyer
2012-11-16 19:51 ` Andrew Morton
2012-11-16 19:51 ` Andrew Morton
2012-11-20 1:43 ` Valdis.Kletnieks
2012-11-16 20:06 ` Mel Gorman
2012-11-16 20:06 ` Mel Gorman
2012-11-20 15:38 ` Josh Boyer
2012-11-20 15:38 ` Josh Boyer
2012-11-20 16:13 ` Bruno Wolff III
2012-11-20 16:13 ` Bruno Wolff III
2012-11-20 17:43 ` Thorsten Leemhuis
2012-11-20 17:43 ` Thorsten Leemhuis
2012-11-23 15:20 ` Thorsten Leemhuis
2012-11-23 15:20 ` Thorsten Leemhuis
2012-11-27 11:12 ` Mel Gorman
2012-11-27 11:12 ` Mel Gorman
2012-11-21 15:08 ` Mel Gorman
2012-11-21 15:08 ` Mel Gorman
2012-11-20 9:18 ` Glauber Costa
2012-11-20 9:18 ` Glauber Costa
2012-11-20 20:18 ` Andrew Morton
2012-11-20 20:18 ` Andrew Morton
2012-11-21 8:30 ` Glauber Costa
2012-11-21 8:30 ` Glauber Costa
2012-11-12 12:19 ` kswapd0: excessive CPU usage Mel Gorman
2012-11-12 12:19 ` Mel Gorman
2012-11-12 13:13 ` Zdenek Kabelac
2012-11-12 13:13 ` Zdenek Kabelac
2012-11-12 13:31 ` Mel Gorman
2012-11-12 13:31 ` Mel Gorman
2012-11-12 14:50 ` Zdenek Kabelac
2012-11-12 14:50 ` Zdenek Kabelac
2012-11-18 19:00 ` Zdenek Kabelac
2012-11-18 19:00 ` Zdenek Kabelac
2012-11-18 19:07 ` Jiri Slaby
2012-11-18 19:07 ` Jiri Slaby
2012-11-09 8:40 ` Mel Gorman
2012-11-09 8:40 ` Mel Gorman
2012-10-11 22:14 ` Andrew Morton [this message]
2012-10-11 22:14 ` kswapd0: wxcessive " Andrew Morton
2012-10-11 22:26 ` Jiri Slaby
2012-10-11 22:26 ` Jiri Slaby
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