diff options
| author | Chaitra P B <chaitra.basappa@broadcom.com> | 2016-05-06 14:29:30 +0530 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-05-11 16:13:38 -0400 |
| commit | 6c197093847e8cdec844df39a373bfe1f9a1ac8a (patch) | |
| tree | 9e93320a82aa2d42d938d47eb27090f0a91b073c /drivers | |
| parent | b2500d76a0dbaa8993cd6b43941d23d31a312831 (diff) | |
| download | linux-6c197093847e8cdec844df39a373bfe1f9a1ac8a.tar.bz2 | |
mpt3sas: Set maximum transfer length per IO to 4MB for VDs
Set maximum transfer length per IO on RAID volumes to 4MB by setting
VD's queue's max_sector to 8192.
Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/mpt3sas/mpt3sas_base.h | 2 | ||||
| -rw-r--r-- | drivers/scsi/mpt3sas/mpt3sas_scsih.c | 8 |
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.h b/drivers/scsi/mpt3sas/mpt3sas_base.h index af2099a5d3f7..71b1c58fec3b 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.h +++ b/drivers/scsi/mpt3sas/mpt3sas_base.h @@ -112,6 +112,8 @@ #define MPT3SAS_SAS_QUEUE_DEPTH 254 #define MPT3SAS_RAID_QUEUE_DEPTH 128 +#define MPT3SAS_RAID_MAX_SECTORS 8192 + #define MPT_NAME_LENGTH 32 /* generic length of strings */ #define MPT_STRING_LENGTH 64 diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c index d256fc0fcc98..7217218edbac 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c @@ -1909,6 +1909,14 @@ scsih_slave_configure(struct scsi_device *sdev) (unsigned long long)raid_device->wwid, raid_device->num_pds, ds); + if (shost->max_sectors > MPT3SAS_RAID_MAX_SECTORS) { + blk_queue_max_hw_sectors(sdev->request_queue, + MPT3SAS_RAID_MAX_SECTORS); + sdev_printk(KERN_INFO, sdev, + "Set queue's max_sector to: %u\n", + MPT3SAS_RAID_MAX_SECTORS); + } + scsih_change_queue_depth(sdev, qdepth); /* raid transport support */ |