On Fri, Sep 07, 2012 at 04:09:50PM +0930, Rusty Russell wrote: > > So it looks like a bug: we should teach driver to tell host first on leak? > > Yan, Vadim, can you comment please? > > > > Also if true, looks like this bit will be useful to detect a fixed driver on > > the hypervisor side - to avoid unmapping such pages? Rusty what do you > > think? > > So, feature is unimplemented in qemu, and broken in drivers. I starting > to share Paolo's dislike of it. What is broken in drivers? To me it looks like it works exactly as advertized: linux and bsd ack TELL_HOST and tells host first. windows does not do either. Do windows drivers currently are not broken: they just do not support the feature. The claim that drivers and hyprevisors do not support it is false: qemu does not support it but drivers do and in non trivial way. > Don't understand why we'd care about fixed drivers though, if we remove > the feature bit.... > > Cheers, > Rusty. Do we really know there are no hypervisors implementing it? As I said above drivers do have support. -- MST -- 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
