Messages in this thread | | | Subject | Re: [2.6.33-rc5] Weird deadlock when shutting down | From | Johannes Berg <> | Date | Mon, 22 Feb 2010 10:04:50 +0100 |
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On Mon, 2010-02-22 at 16:34 +0800, Américo Wang wrote: > On Sun, Feb 21, 2010 at 7:22 PM, Johannes Berg > <johannes@sipsolutions.net> wrote: > > On Sun, 2010-02-21 at 12:14 +0100, Johannes Berg wrote: > > > >> printk("got cpu\n"); > >> for_each_online_cpu(i) { > >> sm_work = per_cpu_ptr(stop_machine_work, > i); > >> INIT_WORK(sm_work, stop_cpu); > >> queue_work_on(i, stop_machine_wq, sm_work); > >> } > >> /* This will release the thread on our CPU. */ > >> put_cpu(); > >> printk("put cpu\n"); > > > > As odd as that may be, it hangs in put_cpu() here. > > > > Hmm, does adding synchronize_sched() in _cpu_down() help?
No luck.
johannes
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