On 7/23/19 9:48 PM, Ming Lei wrote: > Hi, > > blk-mq may schedule to call queue's complete function on remote CPU via > IPI, but never provide any way to synchronize the request's complete > fn. > > In some driver's EH(such as NVMe), hardware queue's resource may be freed & > re-allocated. If the completed request's complete fn is run finally after the > hardware queue's resource is released, kernel crash will be triggered. > > Fixes this issue by waitting until completed req's complete fn is run. Queued up for 5.4, thanks Ming. -- Jens Axboe
