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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-12-05 14:49:18 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-12-05 14:49:18 -0800 |
| commit | f2f1fa78a155524b849edf359e42a3001ea652c0 (patch) | |
| tree | 8d38fc76e48fc219e393ee57ee5f76843b735258 /block | |
| parent | 24920a79a27dd28e67088bbfcf36746d15587f4d (diff) | |
| download | linux-3.10-f2f1fa78a155524b849edf359e42a3001ea652c0.tar.gz linux-3.10-f2f1fa78a155524b849edf359e42a3001ea652c0.tar.bz2 linux-3.10-f2f1fa78a155524b849edf359e42a3001ea652c0.zip | |
Enforce a minimum SG_IO timeout
There's no point in having too short SG_IO timeouts, since if the
command does end up timing out, we'll end up through the reset sequence
that is several seconds long in order to abort the command that timed
out.
As a result, shorter timeouts than a few seconds simply do not make
sense, as the recovery would be longer than the timeout itself.
Add a BLK_MIN_SG_TIMEOUT to match the existign BLK_DEFAULT_SG_TIMEOUT.
Suggested-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'block')
| -rw-r--r-- | block/bsg.c | 2 | ||||
| -rw-r--r-- | block/scsi_ioctl.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/block/bsg.c b/block/bsg.c index e8bd2475682..e73e50daf3d 100644 --- a/block/bsg.c +++ b/block/bsg.c @@ -202,6 +202,8 @@ static int blk_fill_sgv4_hdr_rq(struct request_queue *q, struct request *rq, rq->timeout = q->sg_timeout; if (!rq->timeout) rq->timeout = BLK_DEFAULT_SG_TIMEOUT; + if (rq->timeout < BLK_MIN_SG_TIMEOUT) + rq->timeout = BLK_MIN_SG_TIMEOUT; return 0; } diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c index 5963cf91a3a..d0bb92cbefb 100644 --- a/block/scsi_ioctl.c +++ b/block/scsi_ioctl.c @@ -208,6 +208,8 @@ static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq, rq->timeout = q->sg_timeout; if (!rq->timeout) rq->timeout = BLK_DEFAULT_SG_TIMEOUT; + if (rq->timeout < BLK_MIN_SG_TIMEOUT) + rq->timeout = BLK_MIN_SG_TIMEOUT; return 0; } |