diff options
| author | Keith Busch <keith.busch@intel.com> | 2015-01-07 18:55:46 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-01-08 08:59:01 -0700 |
| commit | 5b3f25fc343690cafd3e27431a69a7bdaf9df001 (patch) | |
| tree | 8892062d8290c520faf5daf355bcc303501919d5 /block | |
| parent | 1885b24d23716e09b9c952822b05fd7f68099cdb (diff) | |
| download | lwn-5b3f25fc343690cafd3e27431a69a7bdaf9df001.tar.gz lwn-5b3f25fc343690cafd3e27431a69a7bdaf9df001.zip | |
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 <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-mq.c | 4 | ||||
| -rw-r--r-- | block/blk-timeout.c | 3 |
2 files changed, 6 insertions, 1 deletions
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)) diff --git a/block/blk-timeout.c b/block/blk-timeout.c index 56c025894cdf..246dfb16c3d9 100644 --- a/block/blk-timeout.c +++ b/block/blk-timeout.c @@ -190,6 +190,9 @@ void blk_add_timer(struct request *req) struct request_queue *q = req->q; unsigned long expiry; + if (req->cmd_flags & REQ_NO_TIMEOUT) + return; + /* blk-mq has its own handler, so we don't need ->rq_timed_out_fn */ if (!q->mq_ops && !q->rq_timed_out_fn) return; |