[Bug 276476] Re: INFO: task blocked for more than 120 seconds causes system freeze

[Jean-Peer Lorenz]

Is definitely not fixed in Lucid 10.04. I'm facing this since upgrading
to Lucid.

Excerpt from the syslog:
--------------------------
May 18 11:43:05 damballah kernel: [ 2245.176082] usb 4-1: reset full speed USB device using ohci_hcd and address 2
May 18 11:43:40 damballah kernel: [ 2280.216126] INFO: task nautilus:2076 blocked for more than 120 seconds.
May 18 11:43:40 damballah kernel: [ 2280.216136] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 18 11:43:40 damballah kernel: [ 2280.216141] nautilus      D 000076ec     0  2076   1143 0x00000000
May 18 11:43:40 damballah kernel: [ 2280.216149]  d9f15e08 00200086 f1da0000 000076ec 00000000 c0846740 f3e5291c c0846740
May 18 11:43:40 damballah kernel: [ 2280.216159]  5bdf771b 000001f1 c0846740 c0846740 f3e5291c c0846740 c0846740 f0452000
May 18 11:43:40 damballah kernel: [ 2280.216167]  00000000 000001f1 f3e52670 c7a9a028 c7a9a02c ffffffff d9f15e34 c058a556
May 18 11:43:40 damballah kernel: [ 2280.216176] Call Trace:
May 18 11:43:40 damballah kernel: [ 2280.216194]  [<c058a556>] __mutex_lock_slowpath+0xc6/0x130
May 18 11:43:40 damballah kernel: [ 2280.216200]  [<c058a475>] mutex_lock+0x25/0x40
May 18 11:43:40 damballah kernel: [ 2280.216214]  [<f83ca3e9>] fat_count_free_clusters+0x29/0x260 [fat]
May 18 11:43:40 damballah kernel: [ 2280.216225]  [<c016ae38>] ? lock_hrtimer_base+0x28/0x50
May 18 11:43:40 damballah kernel: [ 2280.216232]  [<c022002f>] ? mntput_no_expire+0x1f/0xe0
May 18 11:43:40 damballah kernel: [ 2280.216237]  [<c022002f>] ? mntput_no_expire+0x1f/0xe0
May 18 11:43:40 damballah kernel: [ 2280.216245]  [<f83cc368>] fat_statfs+0xc8/0xe0 [fat]
May 18 11:43:40 damballah kernel: [ 2280.216256]  [<c02070bd>] vfs_statfs+0x6d/0x80
May 18 11:43:40 damballah kernel: [ 2280.216261]  [<c02070ed>] vfs_statfs64+0x1d/0x40
May 18 11:43:40 damballah kernel: [ 2280.216267]  [<c02071eb>] sys_statfs64+0x5b/0x90
May 18 11:43:40 damballah kernel: [ 2280.216273]  [<c017ab53>] ? do_futex+0xc3/0x1f0
May 18 11:43:40 damballah kernel: [ 2280.216278]  [<c017acf2>] ? sys_futex+0x72/0x120
May 18 11:43:40 damballah kernel: [ 2280.216285]  [<c01033ec>] syscall_call+0x7/0xb
May 18 11:43:42 damballah kernel: [ 2282.176066] usb 4-1: reset full speed USB device using ohci_hcd and address 2
May 18 11:44:10 damballah kernel: Kernel logging (proc) stopped.
-------------------

After login a backup cronjob was started (nice = 19!) and the system got
nearly unusable.

Should anyone modifiy the bug status to pull some attraction on this
issue again?

-- 
INFO: task blocked for more than 120 seconds causes system freeze
https://bugs.launchpad.net/bugs/276476
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