On 09.09.2013, at 11:29, Benjamin Herrenschmidt wrote: > On Mon, 2013-09-09 at 08:06 +0200, Alexander Graf wrote: >> I think it's ok to restrict live migration to machines with the same >> tb frequency when kvm is enabled. Whether you implement it through a >> hardcoded 512Mhz or through a timebase value that gets live migrated >> and then compared is up to you - both ways work for me :). > > The latter might be handy if we want to support migration on 970, though > we don't have the TBU40 stuff there so adjusting the TB in the host > kernel would be ... problematic.
Well, we could save/restore TB when we enter/exit the guest, no? But I really only want to have something that doesn't block the door for someone who wants to enable things. Alex
