| Message ID | 20170622095845.4235-2-ydfan@suse.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
diff --git a/drivers/scsi/smartpqi/smartpqi.h b/drivers/scsi/smartpqi/smartpqi.h index b673825f46b5..9513357bd472 100644 --- a/drivers/scsi/smartpqi/smartpqi.h +++ b/drivers/scsi/smartpqi/smartpqi.h @@ -630,7 +630,7 @@ struct pqi_encryption_info { }; #define PQI_MAX_OUTSTANDING_REQUESTS ((u32)~0) -#define PQI_MAX_TRANSFER_SIZE (4 * 1024U * 1024U) +#define PQI_MAX_TRANSFER_SIZE (1024U * 1024U) #define RAID_MAP_MAX_ENTRIES 1024
The smartpqi firmware will bypass the cache for any request larger than 1MB, so we should cap the request size to avoid any performance degradation on SLE12-SP2 This degradation is caused from d2be537c3ba3568acd79cd178327b842e60d035e, which changed max_sectors_kb to 1280k, but the hardware is able to work fine with it, so the true fix should be from smartpqi driver. Reference: bsc#1025461 Signed-off-by: Yadan Fan <ydfan@suse.com> --- drivers/scsi/smartpqi/smartpqi.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)