From: Tejun Heo <tj@kernel.org>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] workqueue: fix cwq->nr_active underflow
Date: Wed, 25 Aug 2010 16:21:56 +0200 [thread overview]
Message-ID: <4C752704.1030806@kernel.org> (raw)
In-Reply-To: <1282746326.3667.8.camel@jlt3.sipsolutions.net>
On 08/25/2010 04:25 PM, Johannes Berg wrote:
> On Wed, 2010-08-25 at 11:12 +0200, Tejun Heo wrote:
>
>> Yeap, without the fix patch applied, that should confirm that we're
>> seeing the same failure, and with the patch applied, you can add a
>> printk in the else part of !delayed check in cwq_dec_nr_in_flight().
>> If the printk triggers and later rmmod dosen't trigger BUG_ON(), we
>> can be fairly sure the problem is fixed.
>
> Unfortunately, I haven't been able to trigger either code path today.
> I'll happily believe that this was the problem though, and will just let
> you know if I run into it again, I'm keeping the debug patch for now.
> It's certainly a valid fix regardless of whether I can reproduce the
> problem or not.
Thanks. I'll push it to Linus tomorrow.
--
tejun
prev parent reply other threads:[~2010-08-25 14:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-25 8:52 [PATCH] workqueue: fix cwq->nr_active underflow Tejun Heo
2010-08-25 9:11 ` Johannes Berg
2010-08-25 9:12 ` Tejun Heo
2010-08-25 9:20 ` Johannes Berg
2010-08-25 14:25 ` Johannes Berg
2010-08-25 14:21 ` Tejun Heo [this message]
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