Messages in this thread | | | Subject | Re: [2.6.33-rc5] Weird deadlock when shutting down | From | Johannes Berg <> | Date | Thu, 18 Feb 2010 10:36:15 +0100 |
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On Fri, 2010-01-29 at 15:41 +1100, Benjamin Herrenschmidt wrote: > Hi Ingo ! > > Johannes and I see this on our quad G5s... it -could- be similar to > one reported a short while ago by Xiaotian Feng <xtfeng@gmail.com> > under the subject [2.6.33-rc4] sysfs lockdep warnings on cpu hotplug. > > Basically, the machine deadlocks right after printing the following > when doing a shutdown: > > halt/4071 is trying to acquire lock: > (s_active){++++.+}, at: [<c0000000001ef868>] > .sysfs_addrm_finish+0x58/0xc0 > > but task is already holding lock: > (&per_cpu(cpu_policy_rwsem, cpu)){+.+.+.}, at: [<c0000000004cd6ac>] > .lock_policy_rwsem_write+0x84/0xf4 > > which lock already depends on the new lock. > > the existing dependency chain (in reverse order) is:
This is still happening with -rc8. Any news?
johannes
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