mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

scsi: aacraid: Set correct Queue Depth for HBA1000 RAW disks 

The default queue depth for non NATIVE RAW disks is calculated from the
number of fibs and number of disks or a max of 256. This causes poor disk
IO performance.

The fix is to set default qd based on the type of disks
(SATA -32 and SAS -64)

Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Reviewed-by: David Carroll <david.carroll@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Raghava Aditya Renukunta 2017-05-10 09:39:38 -07:00 committed by Martin K. Petersen
parent d58129c96b
commit 58eaffe54b
1 changed files with 20 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/scsi/aacraid/linit.c
View File

@ -405,17 +405,23 @@ static int aac_slave_configure(struct scsi_device *sdev)
int chn, tid;
unsigned int depth = 0;
unsigned int set_timeout = 0;
bool set_qd_dev_type = false;
u8 devtype = 0;
chn = aac_logical_to_phys(sdev_channel(sdev));
tid = sdev_id(sdev);
if (chn < AAC_MAX_BUSES && tid < AAC_MAX_TARGETS &&
aac->hba_map[chn][tid].devtype == AAC_DEVTYPE_NATIVE_RAW) {
depth = aac->hba_map[chn][tid].qd_limit;
if (chn < AAC_MAX_BUSES && tid < AAC_MAX_TARGETS && aac->sa_firmware) {
devtype = aac->hba_map[chn][tid].devtype;
if (devtype == AAC_DEVTYPE_NATIVE_RAW)
depth = aac->hba_map[chn][tid].qd_limit;
else if (devtype == AAC_DEVTYPE_ARC_RAW)
set_qd_dev_type = true;
set_timeout = 1;
goto common_config;
}
if (aac->jbod && (sdev->type == TYPE_DISK))
sdev->removable = 1;
@ -470,16 +476,22 @@ static int aac_slave_configure(struct scsi_device *sdev)
if (sdev_channel(sdev) != NATIVE_CHANNEL)
goto common_config;
/*
* Check if SATA drive
*/
set_qd_dev_type = true;
}
common_config:
/*
* Check if SATA drive
*/
if (set_qd_dev_type) {
if (strncmp(sdev->vendor, "ATA", 3) == 0)
depth = 32;
else
depth = 64;
}
common_config:
/*
* Firmware has an individual device recovery time typically
* of 35 seconds, give us a margin.