From: "Doug Smythies" <dsmythies@telus.net>
To: "'Rafael J. Wysocki'" <rafael@kernel.org>, <sedat.dilek@gmail.com>,
        "'Thomas Gleixner'" <tglx@linutronix.de>
Cc: "'Jani Nikula'" <jani.nikula@intel.com>,
        "'Pavel Machek'" <pavel@ucw.cz>,
        "'Rafael J. Wysocki'" <rafael.j.wysocki@intel.com>,
        "'Daniel Vetter'" <daniel.vetter@ffwll.ch>,
        "'Chris Wilson'" <chris@chris-wilson.co.uk>,
        "'intel-gfx'" <intel-gfx@lists.freedesktop.org>,
        "'LKML'" <linux-kernel@vger.kernel.org>,
        "'the arch/x86 maintainers'" <x86@kernel.org>,
        "'Mika Kuoppala'" <mika.kuoppala@linux.intel.com>,
        "'Linux PM'" <linux-pm@vger.kernel.org>
References: <CA+icZUVdjS8Wjjw5WxLZmv6JHV3ybFGnG8fi6TuafXDgGSV4SQ@mail.gmail.com> <20161227211329.GA8195@amd> <CA+icZUVb+zDRWV8SNVWx-U6w+i794OQ=ua4a+fTL2y5KihFAGA@mail.gmail.com> <87r34sjw29.fsf@intel.com> <CA+icZUWtOMcr0cE_S8Zbqsce1ETX2i_3hboj+suVoZSgXprZTA@mail.gmail.com> MMlxcy4WIL5mtMMlycGjUh
In-Reply-To: MMlxcy4WIL5mtMMlycGjUh
Subject: RE: [Linux v4.10.0-rc1] call-traces after suspend-resume (pm? i915? cpu/hotplug?)
Date: Wed, 28 Dec 2016 16:28:21 -0800
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On 2016.12.28 14:33 Rafael J. Wysocki wrote:
> On Wed, Dec 28, 2016 at 11:00 AM, Sedat Dilek <sedat.dilek@gmail.com> wrote:
>> On Wed, Dec 28, 2016 at 9:29 AM, Jani Nikula <jani.nikula@intel.com> wrote:
>>> On Wed, 28 Dec 2016, Sedat Dilek <sedat.dilek@gmail.com> wrote:
>>>> On Tue, Dec 27, 2016 at 10:13 PM, Pavel Machek <pavel@ucw.cz> wrote:
>>>>
>>>> P.S.: Revert "cpu/hotplug: Prevent overwriting of callbacks"
>>>>
>>>> This reverts commit dc280d93623927570da279e99393879dbbab39e7
>>>> Author: Thomas Gleixner <tglx@linutronix.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.