CVS commit: src/sys/arch/xen/xen

[Manuel Bouyer <bouyer%netbsd.org@localhost>]

Module Name:    src
Committed By:   bouyer
Date:           Wed Sep 23 17:48:55 UTC 2009

Modified Files:
        src/sys/arch/xen/xen: xbd_xenbus.c xbdback_xenbus.c

Log Message:
xbdback: implement and publish "feature-flush-cache".
xbd: if feature-flush-cache is present, use it for DIOCCACHESYNC.
 If not present, make DIOCCACHESYNC return EOPNOTSUPP and warn on
 first call.
Should improve WAPBL reliability of Xen guests on a NetBSD dom0.
Unfortunably not all linux guests seems to support this feature, and using
feature-write-barrier would require a B_BARRIER flag in the buffer.


To generate a diff of this commit:
cvs rdiff -u -r1.42 -r1.43 src/sys/arch/xen/xen/xbd_xenbus.c
cvs rdiff -u -r1.24 -r1.25 src/sys/arch/xen/xen/xbdback_xenbus.c

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