Messages in this thread | | | Date | Thu, 5 Mar 2015 04:36:38 -0500 | From | Tejun Heo <> | Subject | Re: [PATCH wq/for-4.0-fixes v2] workqueue: fix hang involving racing cancel[_delayed]_work_sync()'s for PREEMPT_NONE |
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On Thu, Mar 05, 2015 at 10:24:50AM +0100, Tomeu Vizoso wrote: ... > [ 317.251001] PC is at bit_waitqueue+0x38/0x6c ... > [ 317.420658] [<c028fe18>] (bit_waitqueue) from [<c0270d34>] > (__cancel_work_timer+0x28/0x1b0) > [ 317.430598] [<c0270d34>] (__cancel_work_timer) from [<c0270ed8>] > (cancel_work_sync+0x1c/0x20) > [ 317.440672] [<c0270ed8>] (cancel_work_sync) from [<bf0ed138>] > (regulatory_exit+0x24/0x17c [cfg80211]) > [ 317.451396] [<bf0ed138>] (regulatory_exit [cfg80211]) from > [<bf125184>] (cfg80211_exit+0x38/0x4c [cfg80211]) > [ 317.462726] [<bf125184>] (cfg80211_exit [cfg80211]) from > [<c02c8b4c>] (SyS_delete_module+0x1b4/0x1f8) > [ 317.473411] [<c02c8b4c>] (SyS_delete_module) from [<c0210a00>] > (ret_fast_syscall+0x0/0x34)
Ah, I think that's from feeding static address to virt_to_page. :( Reverted the patch from the branch. Will think more about what to do.
Thanks.
-- tejun
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