Reduce the requeue delay in dm_requeue_original_request() from 5s to 0.5s to avoid that this delay slows down failover or failback. Increase the requeue delay in dm_mq_queue_rq() from 0.1s to 0.5s to reduce the system load if immediate requeuing has been requested by the dm driver. Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx> Reviewed-by: Hannes Reinecke <hare@xxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxx> --- drivers/md/dm-rq.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c index 0b081d170087..c53debdcd7dc 100644 --- a/drivers/md/dm-rq.c +++ b/drivers/md/dm-rq.c @@ -280,7 +280,7 @@ static void dm_requeue_original_request(struct dm_rq_target_io *tio, bool delay_ if (!rq->q->mq_ops) dm_old_requeue_request(rq); else - dm_mq_delay_requeue_request(rq, delay_requeue ? 5000 : 0); + dm_mq_delay_requeue_request(rq, delay_requeue ? 500/*ms*/ : 0); rq_completed(md, rw, false); } @@ -755,7 +755,7 @@ static int dm_mq_queue_rq(struct blk_mq_hw_ctx *hctx, /* Undo dm_start_request() before requeuing */ rq_end_stats(md, rq); rq_completed(md, rq_data_dir(rq), false); - blk_mq_delay_run_hw_queue(hctx, 100/*ms*/); + blk_mq_delay_run_hw_queue(hctx, 500/*ms*/); return BLK_MQ_RQ_QUEUE_BUSY; } -- 2.12.2 -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
