Messages in this thread | | | Date | Fri, 31 Aug 2012 10:12:24 +0300 | Subject | Re: [PATCH] perf/x86: Disable uncore on virtualized CPU. | From | Pekka Enberg <> |
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On Tue, Aug 21, 2012 at 12:08 PM, Yan, Zheng <zheng.z.yan@intel.com> wrote: >> From: "Yan, Zheng" <zheng.z.yan@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. >> >> Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> >> --- >> 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 <penberg@kernel.org> wrote: > Tested-by: Pekka Enberg <penberg@kernel.org>
Ping? I have not seen a tip bot email for this. Is the patch queued?
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