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| author | Marcin Tomczak <marcin.tomczak@intel.com> | 2012-01-04 01:32:54 -0800 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-01-16 11:43:39 +0400 |
| commit | 6024d38b86ecc7943e398ef01b0dc2765870d444 (patch) | |
| tree | 438704c82c54d11b790e68ad2415bad7f700d2a2 | |
| parent | 9fee607f0b29adabd72265a847b8e421dff10d66 (diff) | |
| download | linux-3.10-6024d38b86ecc7943e398ef01b0dc2765870d444.tar.gz linux-3.10-6024d38b86ecc7943e398ef01b0dc2765870d444.tar.bz2 linux-3.10-6024d38b86ecc7943e398ef01b0dc2765870d444.zip | |
[SCSI] isci: performance-fix, shorten default "no outbound task" timeout
"No task timeout timer reduced from 20 to 2 This timer controls how
long the SCU hardware will hold open the TX side of the connection
before sending a DONE. The timer allows the hardware to attempt to
optimize the DONE/CLOSE behavior to allow for new COMMAND IU to be
posted. In practice closing the connection quicker is better."
Signed-off-by: Marcin Tomczak <marcin.tomczak@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
| -rw-r--r-- | drivers/scsi/isci/host.c | 2 | ||||
| -rw-r--r-- | drivers/scsi/isci/init.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c index 9a52b984620..670ecb456d4 100644 --- a/drivers/scsi/isci/host.c +++ b/drivers/scsi/isci/host.c @@ -1697,7 +1697,7 @@ static void sci_controller_set_default_config_parameters(struct isci_host *ihost ihost->user_parameters.ssp_inactivity_timeout = 5; ihost->user_parameters.stp_max_occupancy_timeout = 5; ihost->user_parameters.ssp_max_occupancy_timeout = 20; - ihost->user_parameters.no_outbound_task_timeout = 20; + ihost->user_parameters.no_outbound_task_timeout = 2; } static void controller_timeout(unsigned long data) diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c index 1047108ba4d..3c4ddad9705 100644 --- a/drivers/scsi/isci/init.c +++ b/drivers/scsi/isci/init.c @@ -94,7 +94,7 @@ MODULE_DEVICE_TABLE(pci, isci_id_table); /* linux isci specific settings */ -unsigned char no_outbound_task_to = 20; +unsigned char no_outbound_task_to = 2; module_param(no_outbound_task_to, byte, 0); MODULE_PARM_DESC(no_outbound_task_to, "No Outbound Task Timeout (1us incr)"); |