CVS commit: [netbsd-6] src/sys/dev/raidframe

["Jeff Rizzo" <riz%netbsd.org@localhost>]

Module Name:    src
Committed By:   riz
Date:           Mon Aug 13 19:41:30 UTC 2012

Modified Files:
        src/sys/dev/raidframe [netbsd-6]: rf_netbsdkintf.c

Log Message:
Pull up following revision(s) (requested by buhrow in ticket #488):
        sys/dev/raidframe/rf_netbsdkintf.c: revision 1.298
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 -r1.295.6.1 -r1.295.6.2 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.