diff options
| author | Don Brace <don.brace@microchip.com> | 2023-10-11 14:00:23 -0500 |
|---|---|---|
| committer | Alejandro Colomar <alx@kernel.org> | 2023-10-15 00:47:51 +0200 |
| commit | 5fdcb5af706691ab62ddef6c08b97eb633c59e15 (patch) | |
| tree | 512e9d62c60618abb0fe00454146fe249d7dab64 /man4 | |
| parent | 75f9012fa188156534492b8b283698bf7c5ecebb (diff) | |
smartpqi.4: Add host attributes
Add in some host level sysfs entries:
enable_stream_detection - Send RAID 5/6 writes down the normal I/O path.
Allow for full-stripe write requests.
ssd_smart_path_enabled - Indicates that our Accelerated I/O (AIO) path
is enabled (AIO).
enable_r5_writes - Allow RAID 5 write operations down the AIO path.
enable_r6_writes - Allow RAID 6 write operations down the AIO path.
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>
Diffstat (limited to 'man4')
| -rw-r--r-- | man4/smartpqi.4 | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/man4/smartpqi.4 b/man4/smartpqi.4 index ea19e46bf..9a6eec1b6 100644 --- a/man4/smartpqi.4 +++ b/man4/smartpqi.4 @@ -255,6 +255,69 @@ $ \c Adaptec .EE .in +.TP +.IR /sys/class/scsi_host/host * /enable_stream_detection +The +.I enable_stream_detection +attribute is read-write. +This attribute enables/disables stream detection in the driver. +Enabling stream detection can improve sequential write performance +for ioaccel-enabled volumes. +See the +.BI ssd_smart_path_enabled +disk attribute section for details on ioaccel-enabled volumes. +The default value is 1 (stream detection enabled). +.IP +Enable example: +.IP +.in +4n +.EX +$ \c +.B echo 1 > /sys/class/scsi_host/host1/enable_stream_detection +.EE +.in +.TP +.IR /sys/class/scsi_host/host * /enable_r5_writes +The +.I enable_r5_writes +attribute is read-write. +This attribute enables/disables RAID 5 write operations +for ioaccel-enabled volumes. +Enabling can improve sequential write performance. +See the +.BI ssd_smart_path_enabled +disk attribute section for details on ioaccel-enabled volumes. +The default value is 1 (RAID 5 writes enabled). +.IP +Enable example: +.IP +.in +4n +.EX +$ \c +.B echo 1 > /sys/class/scsi_host/host1/enable_r5_writes +.EE +.in +.TP +.IR /sys/class/scsi_host/host * /enable_r6_writes +The +.I enable_r6_writes +attribute is read-write. +This attribute enables/disables RAID 6 write operations +for ioaccel-enabled volumes. +Enabling can improve sequential write performance. +See the +.BI ssd_smart_path_enabled +disk attribute section for details on ioaccel-enabled volumes. +The default value is 1 (RAID 6 writes enabled). +.IP +Enable example: +.IP +.in +4n +.EX +$ \c +.B echo 1 > /sys/class/scsi_host/host1/enable_r6_writes +.EE +.in .SS SmartPQI-specific disk attribute files in \f[BI]/sys\fP In the file specifications below, .I c |