On Tue, Aug 21, 2012 at 05:08:37PM +0800, Yan, Zheng wrote: >> From: "Yan, Zheng" <zheng.z....@intel.com> >> >> Initializing uncore PMU on virtualized CPU may hang the kernel. >> This is because kvm does not emulate the entire hardware. Thers >> are lots of uncore related MSRs, making kvm enumerate them all >> is a non-trival task. So just disable uncore on virtualized CPU.
On Tue, Aug 21, 2012 at 5:31 PM, Andi Kleen <a...@firstfloor.org> wrote: > I'm not sure cpu_has_hypervisor is reliable enough for this. > Better find out why it hangs and fix that. > > Early rdmsrls should be rdmsrl_safe() > Early writes in the driver should check if anything was written, > and if not then disable itself. It's unfortunate that the changelog does not include any reference to the actual thread this was discussed in: http://www.mail-archive.com/kvm@vger.kernel.org/msg77524.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
