Re: [PATCH 1/1] [RFC] workqueue: fix ghost PENDING flag while doing MQ IO

[Tejun Heo]

On Mon, Apr 25, 2016 at 11:48:47AM -0400, Tejun Heo wrote:
> Heh, excellent debugging.  I wonder how old this bug is.  cc'ing David

I just went through the history.  So, we used to have clear_bit()
instead of atomic_long_set() but clear_bit() doesn't imply any barrier
either, so kudos to you.  You just debugged an issue which is most
likely has been there for over a decade! :)

-- 
tejun