linux-kernel - Re: [workqueue] BUG: unable to handle kernel paging request at ffff880000798f60

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Message-ID: <20140219124614.GM15586@twins.programming.kicks-ass.net>
Date:	Wed, 19 Feb 2014 13:46:14 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Fengguang Wu <fengguang.wu@...el.com>
Cc:	Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [workqueue] BUG: unable to handle kernel paging request at
 ffff880000798f60

On Wed, Feb 19, 2014 at 08:41:22PM +0800, Fengguang Wu wrote:
> Greetings,
> 
> I got the below dmesg and the first bad commit is
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git
> 
> commit 84604340d034a074036e86e85c4055a1c7ea5529
> Author:     Peter Zijlstra <peterz@...radead.org>
> AuthorDate: Tue Feb 11 12:00:36 2014 +0100
> Commit:     Tejun Heo <tj@...nel.org>
> CommitDate: Tue Feb 11 10:25:17 2014 -0500
> 
>     workqueue: Fix workqueue lockdep name
>     
>     Tommi noticed a 'funny' lock class name: "%s#5" from a lock acquired
>     in process_one_work(). It turns out that commit b196be89cdc14 forgot
>     to change the lockdep_init_map() when it changed the @lock_name
>     argument from a string to a format.
>     
>     Fixes: b196be89cdc14 ("workqueue: make alloc_workqueue() take printf
>     fmt and args for name")
>     
>     Reported-by: Tommi Rantala <tt.rantala@...il.com>
>     Signed-off-by: Peter Zijlstra <peterz@...radead.org>
>     Signed-off-by: Tejun Heo <tj@...nel.org>
>     Cc: stable@...r.kernel.org

I seem to remember tj already having reverted this patch.
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