From: Joseph Salisbury <joseph.salisbury@canonical.com>
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Thomas Gleixner <tglx@linutronix.de>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>,
Andi Kleen <andi.kleen@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Andy Lutomirski <luto@amacapital.net>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Borislav Petkov <bp@alien8.de>, Brian Gerst <brgerst@gmail.com>,
Denys Vlasenko <dvlasenk@redhat.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Harish Chegondi <harish.chegondi@intel.com>,
Jacob Pan <jacob.jun.pan@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Kan Liang <kan.liang@intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
"Luis R. Rodriguez" <mcgrof@suse.com>,
Stephane Eranian <eranian@google.com>,
Toshi Kani <toshi.kani@hp.com>,
Vince Weaver <vincent.weaver@maine.edu>,
LKML <linux-kernel@vger.kernel.org>,
yingying.zhao@intel.com, "Zhang,
Xiong Y" <xiong.y.zhang@intel.com>,
1573231@bugs.launchpad.net, 1397880@bugs.launchpad.net,
Ingo Molnar <mingo@redhat.com>,
x86@kernel.org,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Chen Yucong <slaoub@gmail.com>,
Laura Abbott <labbott@fedoraproject.org>,
David Vrabel <david.vrabel@citrix.com>
Subject: Re: [v4.6-rc1 Regression] x86/topology: Create logical package id
Date: Fri, 6 May 2016 16:51:06 -0400 [thread overview]
Message-ID: <572D03BA.7020306@canonical.com> (raw)
In-Reply-To: <572D02AA.5050506@oracle.com>
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
next prev parent reply other threads:[~2016-05-06 20:51 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-06 18:15 [v4.6-rc1 Regression] x86/topology: Create logical package id Joseph Salisbury
2016-05-06 18:48 ` Thomas Gleixner
2016-05-06 19:13 ` Boris Ostrovsky
2016-05-06 19:38 ` Joseph Salisbury
2016-05-06 20:46 ` Boris Ostrovsky
2016-05-06 20:51 ` Joseph Salisbury [this message]
2016-05-06 21:24 ` Boris Ostrovsky
2016-05-06 19:38 ` Joseph Salisbury
2016-05-06 20:50 ` Joseph Salisbury
2016-05-07 5:16 ` Ingo Molnar
2016-05-07 8:12 ` [tip:x86/urgent] x86/topology: Handle CPUID bogosity gracefully tip-bot for Thomas Gleixner
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