Hello Ming, Can you have a look at the attached patch? That patch uses an srcu read lock for all queue types, whether or not the BLK_MQ_F_BLOCKING flag has been set. Additionally, I have dropped the QUEUE_FLAG_QUIESCING flag. Just like previous versions, this patch has been tested.
Hey Bart, Do we care about the synchronization of queue_rq and/or blk_mq_run_hw_queue of the hctx is not stopped? I'm wandering if we can avoid introducing new barriers in the submission path of its not absolutely needed. -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
