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Re: [PATCH 6/6] workqueue: reimplement WQ_HIGHPRI using a separate worke

from [Tejun Heo] [Permanent Link][Original]
To: Tony Luck <tony.luck@xxxxxxxxx>
Subject: Re: [PATCH 6/6] workqueue: reimplement WQ_HIGHPRI using a separate worker_pool
From: Tejun Heo <tj@xxxxxxxxxx>
Date: Thu, 12 Jul 2012 16:36:45 -0700
Cc: Fengguang Wu <fengguang.wu@xxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, torvalds@xxxxxxxxxxxxxxxxxxxx, joshhunt00@xxxxxxxxx, axboe@xxxxxxxxx, rni@xxxxxxxxxx, vgoyal@xxxxxxxxxx, vwadekar@xxxxxxxxxx, herbert@xxxxxxxxxxxxxxxxxxxx, davem@xxxxxxxxxxxxx, linux-crypto@xxxxxxxxxxxxxxx, swhiteho@xxxxxxxxxx, bpm@xxxxxxx, elder@xxxxxxxxxx, xfs@xxxxxxxxxxx, marcel@xxxxxxxxxxxx, gustavo@xxxxxxxxxxx, johan.hedberg@xxxxxxxxx, linux-bluetooth@xxxxxxxxxxxxxxx, martin.petersen@xxxxxxxxxx
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Sender: Tejun Heo <htejun@xxxxxxxxx>
User-agent: Mutt/1.5.20 (2009-06-14) 
Hello, Tony.

On Thu, Jul 12, 2012 at 04:24:47PM -0700, Tony Luck wrote:
> On Thu, Jul 12, 2012 at 3:32 PM, Tejun Heo <tj@xxxxxxxxxx> wrote:
> > Can you please try the following debug patch instead?  Yours is
> > different from Fengguang's.
> 
> New dmesg from mext-20120712 + this new patch (instead of previous one)
> 
> [Note - I see some XXX traces, but no WARN_ON stack dump this time]

The debug patch didn't do anything for the bug itself.  I suppose it's
timing dependent and doesn't always happen (it never reproduces here
for some reason).  Can you please repeat several times and see whether
the warning can be triggered?

Thank you very much!

-- 
tejun
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