Re: [libvirt] [PATCH 5/6] Taint domains configured with cpu mode=host-passthrough

On 01/06/2012 08:04 AM, Jiri Denemark wrote: Aargh - 'git grep taint docs/*.in' turned up nothing, so we don't have any documentation of tainting. That would be a nice thing to add before this patch, along with mentioning each category of taint (including this new category). But I agree that using host-passthrough is a reason for taint - if current qemu does not fully model the host, then upgrading to a newer version of qemu that adds new modeling features will pass through new capabilities to the guest, and that is a guest-visible ABI change (in particular, it might cause a Windows reactivation). Since we try to promise stability, but the passthrough puts us at the mercy of what qemu upgrades implement, declaring taint seems like an appropriate reaction to warn the user of the potential for problems. Maybe you should include something like the above paragraph as justification in your commit message. Your code additions look sane, but I'd feel more comfortable with docs as well. -- Eric Blake eblake(a)redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org