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.
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. -Andi -- 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/
