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| author | James Bottomley <jbottomley@parallels.com> | 2013-10-04 21:42:24 +0000 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2013-10-25 09:58:16 +0100 |
| commit | 7e660100d85af860e7ad763202fff717adcdaacd (patch) | |
| tree | 851008ff72523b38313ddc4609001904e7d400d9 /drivers/scsi/sd.h | |
| parent | d078b5117f18dce57b895df640d9bf2614864829 (diff) | |
| download | linux-7e660100d85af860e7ad763202fff717adcdaacd.tar.gz linux-7e660100d85af860e7ad763202fff717adcdaacd.tar.bz2 linux-7e660100d85af860e7ad763202fff717adcdaacd.zip | |
[SCSI] Derive the FLUSH_TIMEOUT from the basic I/O timeout
Rather than having a separate constant for specifying the timeout on FLUSH
operations, use the basic I/O timeout value that is already configurable
on a per target basis to derive the FLUSH timeout. Looking at the current
definitions of these timeout values, the FLUSH operation is supposed to have
a value that is twice the normal timeout value. This patch preserves this
relationship while leveraging the flexibility of specifying the I/O timeout.
Based on a prior patch by KY Srinivasan <kys@microsoft.com>
Reviewed-by: KY Srinivasan <kys@microsoft.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/sd.h')
| -rw-r--r-- | drivers/scsi/sd.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h index 7a049de22051..26895ff247c5 100644 --- a/drivers/scsi/sd.h +++ b/drivers/scsi/sd.h @@ -13,7 +13,11 @@ */ #define SD_TIMEOUT (30 * HZ) #define SD_MOD_TIMEOUT (75 * HZ) -#define SD_FLUSH_TIMEOUT (60 * HZ) +/* + * Flush timeout is a multiplier over the standard device timeout which is + * user modifiable via sysfs but initially set to SD_TIMEOUT + */ +#define SD_FLUSH_TIMEOUT_MULTIPLIER 2 #define SD_WRITE_SAME_TIMEOUT (120 * HZ) /* |