linux-kernel - Re: [PATCH 4.9 033/120] perf/x86/intel/uncore: Fix hardcoded socket 0 assumption in the Haswell init code

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Message-ID: <5880AB99.4060900@redhat.com>
Date:   Thu, 19 Jan 2017 07:05:45 -0500
From:   Prarit Bhargava <prarit@...hat.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Borislav Petkov <bp@...e.de>, "H. Peter Anvin" <hpa@...or.com>,
        Harish Chegondi <harish.chegondi@...el.com>,
        Jiri Olsa <jolsa@...hat.com>, Kan Liang <kan.liang@...el.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Stephane Eranian <eranian@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vince Weaver <vincent.weaver@...ne.edu>
Subject: Re: [PATCH 4.9 033/120] perf/x86/intel/uncore: Fix hardcoded socket
 0 assumption in the Haswell init code



On 01/19/2017 06:49 AM, Greg Kroah-Hartman wrote:
> On Thu, Jan 19, 2017 at 05:32:46AM -0500, Prarit Bhargava wrote:
>>
>>
>> On 01/18/2017 05:25 PM, Ingo Molnar wrote:
>>>
>>> * Prarit Bhargava <prarit@...hat.com> wrote:
>>>
>>>> 4.9 is broken and requires additional patches beyond this patch.  Applying this 
>>>> patch to 4.9 stable without those additional fixes will result in kernel panics 
>>>> on some Haswell systems that boot on random cores.
>>>
>>> Could you list the patches that are required? It would be nice to backport all 
>>> required fixes to v4.9.
>>>
>>
>> Yeah, I'm going to do that once I get the system back.  I have a feeling that
>> just the two additional patches are required but I want to make sure before I
>> post anything.
> 
> So what do I do here?  Drop this single patch?  Add others now?  Ignore
> it and leave it as-is?

Drop this patch.

P.

> 
> still confused,
> 
> greg k-h
>