Re: [v4.6-rc1 Regression] x86/topology: Create logical package id

From	Joseph Salisbury <joseph.salisbury@canonical.com>
Newsgroups	linux.kernel
Subject	Re: [v4.6-rc1 Regression] x86/topology: Create logical package id
Date	2016-05-06 23:00 +0200
Message-ID	<rvV0S-3D7-1@gated-at.bofh.it> (permalink)
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On 05/06/2016 04:46 PM, Boris Ostrovsky wrote:
> On 05/06/2016 03:38 PM, Joseph Salisbury wrote:
>> On 05/06/2016 03:13 PM, Boris Ostrovsky wrote:
>>> On 05/06/2016 02:48 PM, Thomas Gleixner wrote:
>>>> Yuck. That dies with a divide error. And that looks like XEN is supplying crap
>>>> data in the CPUID.
>>> Joe, do you have
>>>
>>> ed6069b xen/apic: Provide Xen-specific version of cpu_present_to_apicid
>>> APIC op
>>>
>>> -boris
>> Yes the commit is in the 4.4 based Ubuntu kernel.  This bug also happens
>> with the vanilla 4.6-rc5 kernel, which also has that commit.
>
> Can you post guest's cpuid -1 -r ? (I guess after you verify Thomas' patch)
>
> Thanks.
> -boris
>
>
>
Thomas' patch does resolve the bug.  The cpuid info can be seen here:
https://launchpadlibrarian.net/258234267/cpuid_full.txt

Thanks,

Joe

Thread

[v4.6-rc1 Regression] x86/topology: Create logical package id Joseph Salisbury <joseph.salisbury@canonical.com> - 2016-05-06 20:20 +0200
  Re: [v4.6-rc1 Regression] x86/topology: Create logical package id Thomas Gleixner <tglx@linutronix.de> - 2016-05-06 21:00 +0200
    Re: [v4.6-rc1 Regression] x86/topology: Create logical package id Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-05-06 21:20 +0200
      Re: [v4.6-rc1 Regression] x86/topology: Create logical package id Joseph Salisbury <joseph.salisbury@canonical.com> - 2016-05-06 21:40 +0200
        Re: [v4.6-rc1 Regression] x86/topology: Create logical package id Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-05-06 22:50 +0200
          Re: [v4.6-rc1 Regression] x86/topology: Create logical package id Joseph Salisbury <joseph.salisbury@canonical.com> - 2016-05-06 23:00 +0200
            Re: [v4.6-rc1 Regression] x86/topology: Create logical package id Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-05-06 23:30 +0200
    Re: [v4.6-rc1 Regression] x86/topology: Create logical package id Joseph Salisbury <joseph.salisbury@canonical.com> - 2016-05-06 21:40 +0200
      Re: [v4.6-rc1 Regression] x86/topology: Create logical package id Joseph Salisbury <joseph.salisbury@canonical.com> - 2016-05-06 23:00 +0200
    Re: [v4.6-rc1 Regression] x86/topology: Create logical package id Ingo Molnar <mingo@kernel.org> - 2016-05-07 07:20 +0200
    [tip:x86/urgent] x86/topology: Handle CPUID bogosity gracefully tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2016-05-07 10:20 +0200

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