On Wed, Jun 27, 2018 at 01:00:08PM -0700, Bart Van Assche wrote: > On 06/26/18 17:49, Ming Lei wrote: > > Only the waitqueue's lock is held for blk_mq_dispatch_wake(), but this > > hctx->dispatch_wait can be added to another waitqueue, so it isn't > > enough to just hold waitqueue's lock. > > Hello Ming, > > That makes sense to me. I will post an update that addresses this issue. I have sent a new patch days ago: https://marc.info/?l=linux-block&m=152998658713265&w=2 Thanks, Ming