From: Tejun Heo <tj@kernel.org>
To: Tomeu Vizoso <tomeu.vizoso@gmail.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>,
Rabin Vincent <rabinv@axis.com>,
Jesper Nilsson <jespern@axis.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH wq/for-4.0-fixes v2] workqueue: fix hang involving racing cancel[_delayed]_work_sync()'s for PREEMPT_NONE
Date: Thu, 5 Mar 2015 04:36:38 -0500 [thread overview]
Message-ID: <20150305093638.GA23912@htj.duckdns.org> (raw)
In-Reply-To: <CAAObsKBX+h8PNB-81-pjnvoSDA1sgOyckT57inMi_FPX+k=azQ@mail.gmail.com>
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
next prev parent reply other threads:[~2015-03-05 9:36 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-06 17:11 Soft lockups in __cancel_work_timer() Rabin Vincent
2015-02-06 18:01 ` Tejun Heo
2015-02-09 16:15 ` [PATCH for-3.20-fixes] workqueue: fix hang involving racing cancel[_delayed]_work_sync()'s for PREEMPT_NONE Tejun Heo
2015-02-09 16:29 ` Jesper Nilsson
2015-02-10 8:35 ` Jesper Nilsson
2015-02-10 9:33 ` Rabin Vincent
2015-03-02 12:26 ` Jesper Nilsson
2015-03-02 16:21 ` Tejun Heo
2015-03-03 7:52 ` Jesper Nilsson
2015-03-03 10:00 ` Tomeu Vizoso
2015-03-03 13:21 ` Tejun Heo
2015-03-03 13:45 ` [PATCH wq/for-4.0-fixes v2] " Tejun Heo
2015-03-03 13:57 ` Tomeu Vizoso
2015-03-05 9:24 ` Tomeu Vizoso
2015-03-05 9:36 ` Tejun Heo [this message]
2015-03-05 11:46 ` Tejun Heo
2015-03-05 13:03 ` [PATCH v3 wq/for-4.0-fixes] " Tejun Heo
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