CVS commit: src/sys/dev/raidframe

["Brian Buhrow" <buhrow%netbsd.org@localhost>]

Module Name:    src
Committed By:   buhrow
Date:           Thu Aug  9 23:53:25 UTC 2012

Modified Files:
        src/sys/dev/raidframe: rf_netbsdkintf.c

Log Message:
Implement DIOCGSTRATEGY and DIOCSSTRATEGY to allow raidframe to use
different buffer queue strategies.
Initialize raid sets to use the default buffer queue strategy for the given
architecture, rather than forcing raidframe to use  fcfs in all cases.
This should cause raidframe to use the same buffer queue strategy as the
underlying disks.
On I386, I see performance enhancements of between 14 and 16% with raid5
sets with no other change.
See http://mail-index.NetBSD.org/tech-kern/2012/08/08/msg013758.html
for a discussion of this issue.


To generate a diff of this commit:
cvs rdiff -u -r1.297 -r1.298 src/sys/dev/raidframe/rf_netbsdkintf.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.