Hello, On Tue, Mar 07, 2017 at 12:14:20PM +0100, Jan Kara wrote: > > Given that this isn't a super hot path, I think it'd be far better to > > stick to a simpler synchronization mechanism. > > I'd be happy to do so however struct gendisk does not have any lock in it > and introducing a special lock just for that seems awkward. I think even a awkward shared lock is better than memory barriers. Barriers are the trickiest locking construct to get right and we really shouldn't using that unless absolutely necessary. Thanks. -- tejun
