Re: [PATCH for-3.20-fixes] workqueue: fix hang involving racing cancel[_delayed]_work_sync()'s for PREEMPT_NONE

[Jesper Nilsson]

On Mon, Mar 02, 2015 at 11:21:44AM -0500, Tejun Heo wrote:
> On Mon, Mar 02, 2015 at 01:26:15PM +0100, Jesper Nilsson wrote:
> > On Mon, Feb 09, 2015 at 05:15:27PM +0100, Tejun Heo wrote:
> > > Hello,
> > 
> > Hi!
> > 
> > > This patch removes the possible hang by updating __cancel_work_timer()
> > > to explicitly wait for clearing of CANCELING rather than invoking
> > > flush_work() after try_to_grab_pending() fails with -ENOENT.  The
> > > explicit wait uses the matching bit waitqueue for the CANCELING bit.
> > > 
> > > Link: http://lkml.kernel.org/g/20150206171156.GA8942@xxxxxxxx
> > > 
> > > Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
> > > Reported-by: Rabin Vincent <rabin.vincent@xxxxxxxx>
> > > Cc: stable@xxxxxxxxxxxxxxx
> > 
> > What's the status on this patch, it's not in 4.0-rc1 at least?
> > Is it queued for the 3.18 stable branch?
> 
> Sorry about the delay.  Applied to wq/for-4.0-fixes.  Will push out in
> a week or so.

Thanks, that works great. Just wanted to know. :-)

> Thanks.
> 
> -- 
> tejun

/^JN - Jesper Nilsson
-- 
               Jesper Nilsson -- jesper.nilsson@xxxxxxxx
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