Re: [PATCH 2/2] blk-mq: Fix request handover from timeout path to normal execution

From: Bart Van Assche
Date: Mon Apr 02 2018 - 17:08:44 EST


On 04/02/18 12:01, Tejun Heo wrote:
+ * As nothing prevents from completion happening while
+ * ->aborted_gstate is set, this may lead to ignored completions
+ * and further spurious timeouts.
+ */
+ if (rq->rq_flags & RQF_MQ_TIMEOUT_RESET)
+ blk_mq_rq_update_aborted_gstate(rq, 0);

Hello Tejun,

Since this patch fixes one race but introduces another race, is this patch really an improvement?

Thanks,

Bart.