From 5b3f25fc343690cafd3e27431a69a7bdaf9df001 Mon Sep 17 00:00:00 2001 From: Keith Busch Date: Wed, 7 Jan 2015 18:55:46 -0700 Subject: blk-mq: Allow requests to never expire Some types of requests may be started that are not gauranteed to ever complete. This adds a request flag that a driver can use so mark the request as such. Signed-off-by: Keith Busch Signed-off-by: Jens Axboe --- block/blk-mq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'block/blk-mq.c') diff --git a/block/blk-mq.c b/block/blk-mq.c index 261ccd89e15d..78324a2f0e10 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -619,7 +619,7 @@ void blk_mq_rq_timed_out(struct request *req, bool reserved) break; } } - + static void blk_mq_check_expired(struct blk_mq_hw_ctx *hctx, struct request *rq, void *priv, bool reserved) { @@ -627,6 +627,8 @@ static void blk_mq_check_expired(struct blk_mq_hw_ctx *hctx, if (!test_bit(REQ_ATOM_STARTED, &rq->atomic_flags)) return; + if (rq->cmd_flags & REQ_NO_TIMEOUT) + return; if (time_after_eq(jiffies, rq->deadline)) { if (!blk_mark_rq_complete(rq)) -- cgit v1.2.1