From: Jeremy Sanders <jeremy@jeremysanders.net>
To: linux-raid@vger.kernel.org
Subject: stuck tasks
Date: Mon, 12 Apr 2010 11:40:59 +0100 [thread overview]
Message-ID: <hputbs$qq2$1@dough.gmane.org> (raw)
Hi - I'm not getting any joy with Fedora's bugzilla. Has anyone seen
problems like this with Fedora 12? Our systems have recently been getting
stuck while rsyncing data onto an MD device:
https://bugzilla.redhat.com/show_bug.cgi?id=578549
INFO: task kthreadd:2 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kthreadd D 0000000000000002 0 2 0 0x00000000
ffff88007dbfd4c0 0000000000000046 0000000000000000 0000000a00000000
ffff880000000001 ffff880079f9b800 ffff88007dbfdfd8 ffff88007dbfdfd8
ffff88007dbf1b38 000000000000f980 0000000000015740 ffff88007dbf1b38
Call Trace:
[<ffffffff8107c30d>] ? ktime_get_ts+0x85/0x8e
[<ffffffff810d604d>] ? sync_page+0x0/0x4a
[<ffffffff810d604d>] ? sync_page+0x0/0x4a
[<ffffffff814546f5>] io_schedule+0x43/0x5d
[<ffffffff810d6093>] sync_page+0x46/0x4a
[<ffffffff81454c48>] __wait_on_bit+0x48/0x7b
...
Several processes end up stuck in a D state:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 2 0.0 0.0 0 0 ? D Mar31 0:07 [kthreadd]
root 14 0.0 0.0 0 0 ? D Mar31 9:38 [async/mgr]
root 17 0.0 0.0 0 0 ? D Mar31 0:00 [bdi-
default]
root 34 0.0 0.0 0 0 ? D Mar31 10:06 [kswapd0]
root 5509 0.0 0.3 50732 7900 ? D Apr09 0:03 rsync -
raHSx --stats --whole-file --numeric-ids --link-
dest=/xback2_back1/YY/20100407-000501 --exclude=/lost+found --
exclude=.mozilla/*/*/Cache/* XX:/XX_data1/data/YY/
/xback2_back1/YY/20100409-000502/
root 17457 0.0 0.2 61920 5756 ? D Apr11 0:00 python
/data/soft3/backup/diskbackup/diskbackup.py
/data/soft3/backup/diskbackup/main.cfg
root 18402 0.0 0.0 0 0 ? D Apr09 0:11 [flush-9:0]
root 20259 0.0 0.1 4284 3424 ? DN Apr11 0:00
/usr/sbin/prelink -av -mR -q
It only seems to affect our MD systems. The kernel is
2.6.32.10-90.fc12.x86_64. The systems have 3ware 96xx controllers. This
kernel does have the issue when there are lots of aio processes.
The two affected systems have different file systems: xfs and ext3.
Jeremy
next reply other threads:[~2010-04-12 10:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-12 10:40 Jeremy Sanders [this message]
2010-04-12 11:06 ` stuck tasks MRK
2010-04-12 11:14 ` Jeremy Sanders
2010-04-12 12:49 ` MRK
2010-04-12 13:02 ` Jeremy Sanders
2010-04-12 13:38 ` MRK
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