On Wed, Jun 29, 2011 at 07:23:31AM -0500, Anthony Liguori wrote:
Which file system on the host?
Any filesystem. Although extN and btrfs are particularly bad.
At any rate, I'm a big fan of making wce tunable in the guest and then I
think setting wce=1 is quite reasonable to do by default.
Note that this means a manual override during each boot. Windows and
modern Linux just use what's available. Only Solaris with ZFS actually
turns WCE on if it's not set AFAIK. And to me it's a rather questionable
behaviour at least for SCSI disks where the admin might have chosen
those intentionally. (unlike ATA disks SCSI allows to store the setting
permanently)