Re: [workqueue] WARNING: CPU: 0 PID: 76 at drivers/block/floppy.c:968 schedule_bh()

[Jiri Kosina]

On Tue, 8 Jul 2014, Tejun Heo wrote:

> > Hmmm... this is schedule_bh() in floppy.c complaining that the work
> > item is already pending.  The cond_resched() addition by b22ce2785d97
> > doesn't change the semantics around work item execution although it
> > could have exposed an existing problem in the floppy driver.  I'll
> > look into how this could happen.
> 
> It doesn't reproduce here and nothing really stands out to me.  It
> probably involves floppy_work requeueing itself and something else
> getting executed inbetween which wouldn't have happend before, but I
> can't figure out what that could be and either can I follow the
> control flow the driver. :)
>
> 
> Jiri, any ideas?

I will take a look. Could this be a bad bisect though due to this actually 
being a race condition perhaps?

-- 
Jiri Kosina
SUSE Labs
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