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 09:07:13 +0100
From:   Sedat Dilek <sedat.dilek@...il.com>
To:     Pavel Machek <pavel@....cz>
Cc:     "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Chris Wilson <chris@...is-wilson.co.uk>,
        Thomas Gleixner <tglx@...utronix.de>,
        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>,
        Jani Nikula <jani.nikula@...el.com>, linux-pm@...r.kernel.org
Subject: Re: [Linux v4.10.0-rc1] call-traces after suspend-resume (pm? i915? cpu/hotplug?)

On Tue, Dec 27, 2016 at 10:13 PM, Pavel Machek <pavel@....cz> wrote:
> Hi!
>
>> [ Add some pm | i915 | x86 folks ]
>>
>> Hi,
>>
>> I have built Linux v4.10-rc1 today on my Ubuntu/precise AMD64 system
>> and I see some call-traces.
>> It is reproducible on suspend and resume.
>>
>> I cannot say which area touches the problem or if these are several
>> independent problems.
>>
>> For a full dmesg-log see attachments (my linux-config is attached, too).
>>
>> Here some hunks...
>>
>> [   29.003601] BUG: sleeping function called from invalid context at
>> drivers/base/power/runtime.c:1032
>> [   29.003608] in_atomic(): 1, irqs_disabled(): 0, pid: 1469, name: Xorg
>> [   29.003610] 1 lock held by Xorg/1469:
>> [   29.003611]  #0:  (&dev->struct_mutex){+.+.+.}, at:
>> [<ffffffffa0623c13>] i915_mutex_lock_interruptible+0x43/0x140 [i915]
>> [   29.003653] CPU: 0 PID: 1469 Comm: Xorg Not tainted
>> 4.10.0-rc1-1-iniza-small #1
>> [   29.003655] Hardware name: SAMSUNG ELECTRONICS CO., LTD.
>> 530U3BI/530U4BI/530U4BH/530U3BI/530U4BI/530U4BH, BIOS 13XK 03/28/2013
>> [   29.003656] Call Trace:
>
> Just a note, at least 2 machines here refuse to resume with
> v4.10-rc1. One has intel graphics, one has AMD. It may or may not have
> common cause...
>

[ Correct linux-pm ML and add Mika & Jani ]

Thanks for the feedback.

There are some cpu/hotplug fixes post-v4.10-rc1.
Give that a try.

Yesterday, after answers from drm-intel folks I have seen that a
cpu/hotplug commit [1] was reverted in
drm-intel.git#drm-intel-nightly.
I haven't tried that.

It's good when Thomas knows of this and gets in contact with drm-intel folks.

Regards,
- Sedat -

[1] https://cgit.freedesktop.org/drm-intel/commit/?h=drm-intel-nightly&id=e558f178f5390185b7324ff4b816b52c6ae3a928
[2] https://cgit.freedesktop.org/drm-intel/log/?h=drm-intel-nightly

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

It started hanging all machines in CI s3 test:
https://intel-gfx-ci.01.org/CI/igt@gem_exec_suspend@basic-s3.html

Bisected-by: Mika Kuoppala <mika.kuoppala@...ux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@...el.com>

- EOT -