On Tue, Sep 26, 2023 at 02:12:03PM -0500, Don Brace wrote: > 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 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@xxxxxxxxxxxxx> > Reviewed-by: Scott Teel <scott.teel@xxxxxxxxxxxxx> > Reviewed-by: Mike McGowen <mike.mcgowen@xxxxxxxxxxxxx> > Reviewed-by: Kevin Barnett <kevin.barnett@xxxxxxxxxxxxx> > Signed-off-by: Don Brace <don.brace@xxxxxxxxxxxxx> > --- > man4/smartpqi.4 | 57 +++++++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 57 insertions(+) > > diff --git a/man4/smartpqi.4 b/man4/smartpqi.4 > index 635b3fa185ab..19708a01f531 100644 > --- a/man4/smartpqi.4 > +++ b/man4/smartpqi.4 > @@ -235,6 +235,63 @@ $ \c > Adaptec > .EE > .in > +.TP > +.IR /sys/class/scsi_host/host*/enable_stream_detection This should be .I, not .IR. > +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 Please don't go past the 80-col right margin. Thanks, Alex > +.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 > -- > 2.42.0.158.g94e83dcf5b >
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