[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>
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