On 20.03.15 10:39, Paul Mackerras wrote: > From: Bharata B Rao <bharata@xxxxxxxxxxxxxxxxxx> > > Since KVM isn't equipped to handle closure of vcpu fd from userspace(QEMU) > correctly, certain work arounds have to be employed to allow reuse of > vcpu array slot in KVM during cpu hot plug/unplug from guest. One such > proposed workaround is to park the vcpu fd in userspace during cpu unplug > and reuse it later during next hotplug. > > More details can be found here: > KVM: https://www.mail-archive.com/kvm@xxxxxxxxxxxxxxx/msg102839.html > QEMU: http://lists.gnu.org/archive/html/qemu-devel/2014-12/msg00859.html > > In order to support this workaround with PowerPC KVM, don't create or > initialize ICP if the vCPU is found to be already associated with an ICP. > > Signed-off-by: Bharata B Rao <bharata@xxxxxxxxxxxxxxxxxx> > Signed-off-by: Paul Mackerras <paulus@xxxxxxxxx> This probably makes some sense, but please make sure that user space has some way to figure out whether hotplug works at all. Also Paul, for patches that you pick up from others, I'd prefer if they send the patches to the ML themselves first and you pick them up from there then. That way we give everyone the same treatment. Alex -- 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
