p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

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>
This commit is contained in:
Chaitra P B 2016-05-06 14:29:30 +05:30 committed by Martin K. Petersen
parent b2500d76a0
commit 6c19709384
2 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/scsi/mpt3sas/mpt3sas_base.h
View File

@ -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

8
drivers/scsi/mpt3sas/mpt3sas_scsih.c
View File

@ -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 */