Marcelo Tosatti wrote: > Add basic KVM paravirt support. Avoid vm-exits on IO delays. > > Add KVM_GET_PARA_FEATURES ioctl so paravirt features can be reported in a > single bitmask. This allows the host to disable features on runtime if > appropriate, which would require one ioctl per feature otherwise. > > The limit of 32 features can be extended to 64 if needed, beyond that a new > MSR is required. > > v1->v2: > - replace KVM_CAP_CLOCKSOURCE with KVM_CAP_PARA_FEATURES > - cover FEATURE_CLOCKSOURCE > > >
I don't understand the motivation for this. A handful of ioctl()s at init time are hardly time consuming. There is the advantage that paravirt kernel advances are reflected automatically without changes in userspace, but sometimes this is a disadvantage (it means there is no way to disable it, for instance). -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
