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blk-mq: Allow requests to never expire

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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 <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch
2015-01-07 18:55:46 -07:00
committed by Jens Axboe
parent 1885b24d23
commit 5b3f25fc34
3 changed files with 8 additions and 1 deletions
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block/blk-mq.c
+3 -1
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@@ -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))