On Tue, Aug 21, 2012 at 12:08 PM, Yan, Zheng <[email protected]> wrote: >> From: "Yan, Zheng" <[email protected]> >> >> 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. >> >> Signed-off-by: Yan, Zheng <[email protected]> >> --- >> arch/x86/kernel/cpu/perf_event_intel_uncore.c | 3 +++ >> 1 file changed, 3 insertions(+) >> >> diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c >> b/arch/x86/kernel/cpu/perf_event_intel_uncore.c >> index 0a55710..2f005ba 100644 >> --- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c >> +++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c >> @@ -2898,6 +2898,9 @@ static int __init intel_uncore_init(void) >> if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL) >> return -ENODEV; >> >> + if (cpu_has_hypervisor) >> + return -ENODEV; >> + >> ret = uncore_pci_init(); >> if (ret) >> goto fail;
On Tue, Aug 21, 2012 at 3:55 PM, Pekka Enberg <[email protected]> wrote: > Tested-by: Pekka Enberg <[email protected]> Ping? I have not seen a tip bot email for this. Is the patch queued? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
