Re: [PATCH] mac80211: Fix deadlock in ieee80211_do_stop.

[Ben Greear <greearb@candelatech.com>]

On 11/16/2010 06:19 AM, Tejun Heo wrote:

>> Nov 15 13:12:13 localhost kernel: Showing all locks held in the system:
>> Nov 15 13:12:13 localhost kernel: 3 locks held by kworker/0:1/19:
>> Nov 15 13:12:13 localhost kernel: #0:  (events){+.+.+.}, at: [<78446e6f>] process_one_work+0x13e/0x2bf
>> Nov 15 13:12:13 localhost kernel: #1:  (wireless_nlevent_work){+.+.+.}, at: [<78446e6f>] process_one_work+0x13e/0x2bf
>> Nov 15 13:12:13 localhost kernel: #2:  (rtnl_mutex){+.+.+.}, at: [<786ffe97>] rtnl_lock+0xf/0x11
>> Nov 15 13:12:13 localhost kernel: 3 locks held by kworker/0:2/1054:
>> Nov 15 13:12:13 localhost kernel: #0:  (events){+.+.+.}, at: [<78446e6f>] process_one_work+0x13e/0x2bf
>> Nov 15 13:12:13 localhost kernel: #1:  ((&rdev->conn_work)){+.+.+.}, at: [<78446e6f>] process_one_work+0x13e/0x2bf
>> Nov 15 13:12:13 localhost kernel: #2:  (rtnl_mutex){+.+.+.}, at: [<786ffe97>] rtnl_lock+0xf/0x11
>
> Where are the backtraces for kworker/u:5, 0:1 and 0:2?

They are not in /var/log/messages either, at least not in the sysrq-t dump.
I think at least some of them are in there from the blocked-task printouts.

I've uploaded the /var/log/messages file here, in case you want to look
at it:

http://www.candelatech.com/~greearb/messages.gz

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com