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| author | Mike Christie <mchristi@redhat.com> | 2010-08-11 11:06:25 -0500 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2010-09-05 14:57:04 -0300 |
| commit | e3b3e6246726cd05950677ed843010b8e8c5884c (patch) | |
| tree | 587375d4709159d4fe435dabedc6f3fcf0ab71f8 /drivers/scsi | |
| parent | 1c1acab0367d88ad5da2b9db2efdf2699113ec88 (diff) | |
| download | op-kernel-dev-e3b3e6246726cd05950677ed843010b8e8c5884c.zip op-kernel-dev-e3b3e6246726cd05950677ed843010b8e8c5884c.tar.gz | |
[SCSI] scsi/block: increase flush/sync timeout
We have been seeing the flush request timeout with a wide
range of hardware from tgt+iser to FC targets from a major vendor.
After discussions about if the value should be configurable and
what the best value should be, this patch just increases the flush/sync
cache timeout to 1 minute. 2 minutes was determined to be too long, and
making it configurable was troublesome for users.
This patch was made over Linus's tree. It is not made over scsi-misc
or scsi-rc-fixes, because Linus's had block layer changes that my
patch was built over.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Acked-by: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/sd.c | 4 | ||||
| -rw-r--r-- | drivers/scsi/sd.h | 1 |
2 files changed, 3 insertions, 2 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 2714bec..8c9b275 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -477,7 +477,7 @@ static int scsi_setup_discard_cmnd(struct scsi_device *sdp, struct request *rq) static int scsi_setup_flush_cmnd(struct scsi_device *sdp, struct request *rq) { - rq->timeout = SD_TIMEOUT; + rq->timeout = SD_FLUSH_TIMEOUT; rq->retries = SD_MAX_RETRIES; rq->cmd[0] = SYNCHRONIZE_CACHE; rq->cmd_len = 10; @@ -1072,7 +1072,7 @@ static int sd_sync_cache(struct scsi_disk *sdkp) * flush everything. */ res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr, - SD_TIMEOUT, SD_MAX_RETRIES, NULL); + SD_FLUSH_TIMEOUT, SD_MAX_RETRIES, NULL); if (res == 0) break; } diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h index f81a930..315ce9d 100644 --- a/drivers/scsi/sd.h +++ b/drivers/scsi/sd.h @@ -19,6 +19,7 @@ */ #define SD_TIMEOUT (30 * HZ) #define SD_MOD_TIMEOUT (75 * HZ) +#define SD_FLUSH_TIMEOUT (60 * HZ) /* * Number of allowed retries |
