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| author | Jens Axboe <jens.axboe@oracle.com> | 2008-09-14 05:55:09 -0700 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-10-09 08:56:13 +0200 |
| commit | 242f9dcb8ba6f68fcd217a119a7648a4f69290e9 (patch) | |
| tree | 1bfe245ffbc50d204d76665cd8f90d85100f86a1 /block/elevator.c | |
| parent | 608aeef17a91747d6303de4df5e2c2e6899a95e8 (diff) | |
| download | lwn-242f9dcb8ba6f68fcd217a119a7648a4f69290e9.tar.gz lwn-242f9dcb8ba6f68fcd217a119a7648a4f69290e9.zip | |
block: unify request timeout handling
Right now SCSI and others do their own command timeout handling.
Move those bits to the block layer.
Instead of having a timer per command, we try to be a bit more clever
and simply have one per-queue. This avoids the overhead of having to
tear down and setup a timer for each command, so it will result in a lot
less timer fiddling.
Signed-off-by: Mike Anderson <andmike@linux.vnet.ibm.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/elevator.c')
| -rw-r--r-- | block/elevator.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/block/elevator.c b/block/elevator.c index 8e3fc3afc77b..a91fc59edd01 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -36,6 +36,8 @@ #include <linux/hash.h> #include <linux/uaccess.h> +#include "blk.h" + static DEFINE_SPINLOCK(elv_list_lock); static LIST_HEAD(elv_list); @@ -771,6 +773,12 @@ struct request *elv_next_request(struct request_queue *q) */ rq->cmd_flags |= REQ_STARTED; blk_add_trace_rq(q, rq, BLK_TA_ISSUE); + + /* + * We are now handing the request to the hardware, + * add the timeout handler + */ + blk_add_timer(rq); } if (!q->boundary_rq || q->boundary_rq == rq) { |