linux-kernel - RE: [Linux v4.10.0-rc1] call-traces after suspend-resume (pm? i915? cpu/hotplug?)

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Date:   Wed, 28 Dec 2016 16:28:21 -0800
From:   "Doug Smythies" <dsmythies@...us.net>
To:     "'Rafael J. Wysocki'" <rafael@...nel.org>, <sedat.dilek@...il.com>,
        "'Thomas Gleixner'" <tglx@...utronix.de>
Cc:     "'Jani Nikula'" <jani.nikula@...el.com>,
        "'Pavel Machek'" <pavel@....cz>,
        "'Rafael J. Wysocki'" <rafael.j.wysocki@...el.com>,
        "'Daniel Vetter'" <daniel.vetter@...ll.ch>,
        "'Chris Wilson'" <chris@...is-wilson.co.uk>,
        "'intel-gfx'" <intel-gfx@...ts.freedesktop.org>,
        "'LKML'" <linux-kernel@...r.kernel.org>,
        "'the arch/x86 maintainers'" <x86@...nel.org>,
        "'Mika Kuoppala'" <mika.kuoppala@...ux.intel.com>,
        "'Linux PM'" <linux-pm@...r.kernel.org>
Subject: RE: [Linux v4.10.0-rc1] call-traces after suspend-resume (pm? i915? cpu/hotplug?)

On 2016.12.28 14:33 Rafael J. Wysocki wrote:
> On Wed, Dec 28, 2016 at 11:00 AM, Sedat Dilek <sedat.dilek@...il.com> wrote:
>> On Wed, Dec 28, 2016 at 9:29 AM, Jani Nikula <jani.nikula@...el.com> wrote:
>>> On Wed, 28 Dec 2016, Sedat Dilek <sedat.dilek@...il.com> wrote:
>>>> On Tue, Dec 27, 2016 at 10:13 PM, Pavel Machek <pavel@....cz> wrote:
>>>>
>>>> P.S.: Revert "cpu/hotplug: Prevent overwriting of callbacks"
>>>>
>>>> This reverts commit dc280d93623927570da279e99393879dbbab39e7
>>>> Author: Thomas Gleixner <tglx@...utronix.de>
>>>> Date: Wed Dec 21 20:19:49 2016 +0100
>>>> cpu/hotplug: Prevent overwriting of callbacks

With respect to kernel 4.10-rc1 and the above referenced commit:

On my computer rdmsr was not working, and therefore many tools
that use it (i.e. turbostat) were also broken.

I bisected the kernel down to the same above referenced commit.
After finding some potentially related e-mails, I built a
4.10-rc1+ kernel with these:

0dad3a3 x86/mce/AMD: Make the init code more robust
b9d9d69 smp/hotplug: Undo tglxs brainfart
b4b8664 arm64: don't pull uaccess.h into *.S
7ce7d89 Linux 4.10-rc1

And now rdmsr is working fine, as is trubostat.