On Tue, Aug 17, 2010 at 09:44:49AM -0500, Anthony Liguori wrote: > I think the real issue is we're mixing host configuration with guest > visible state. The last time I proposed to decouple the two you and Avi were heavily opposed to it.. > With O_SYNC, we're causing cache=writethrough to do writethrough > through two layers of the storage heirarchy. I don't think that's > necessary or desirable though. It's absolutely nessecary if we tell the guest that we do not have a volatile write cache. Which is the only good reason to use data=writethrough anyway - except for dealing with old guests that can't handle volatile writecache it's an absolutely stupid mode of operation. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
