On Mon, Dec 14, 2009 at 04:01:33PM +0100, Gerd Hoffmann wrote: > On 12/14/09 14:59, Michael S. Tsirkin wrote: >> It's not an easy quesiton. >> If we do it as disable bits, then we get incompatible >> machines when running on different hosts. > > In case that one host supports feature which the other doesn't and the > feature isn't masked out? Well, management failure I'd say. The whole > point of the compat machine types (and properties used there) is to make > sure the vm's are compatible even in case the hosts run different > software versions. > > cheers, > Gerd
So how do you do this? Assume we have -disable_hw_csum. We want new machine type to have it off, right? But now you run qemu on host which does not support hw_csum. With your suggestion it will not enable hw csum? -- MST
