Il 30/07/2012 06:43, Asias He ha scritto: >> > > Yes. Something like this: > > qemu -drive file=foo.img,cache=writeback/unsafe > > is not safe against power losses also? cache=writeback and cache=none are safe, cache=unsafe isn't. > I think we can add REQ_FLUSH & REQ_FUA support to bio path and that > deserves another patch. You only need to add REQ_FLUSH support. The virtio-blk protocol does not support REQ_FUA, because there's no easy way to do it in userspace. Paolo -- 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
