[Bug 101184] New: [bisected] Panic on boot with GK106

[Bug 101184] New: [bisected] Panic on boot with GK106

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https://bugs.freedesktop.org/show_bug.cgi?id=101184

            Bug ID: 101184
           Summary: [bisected] Panic on boot with GK106
           Product: xorg
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: sgilles-8yXg+M/94Z32fBVCVOL8/A@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

Created attachment 131503
  --> https://bugs.freedesktop.org/attachment.cgi?id=131503&action=edit
Transcription of kernel panic

Since e4311ee51d1e2676001b2d8fcefd92bdd79aad85 "drm/nouveau/therm: remove
ineffective workarounds for alarm bugs", my machine with a GTX 650 panics on
boot. I will attach lspci output and a transcription of the panic, and I can
provide more information or test patches as needed.

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[Bug 101184] [bisected] Panic on boot with GK106

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=101184

--- Comment #1 from S. Gilles <sgilles-8yXg+M/94Z32fBVCVOL8/A@public.gmane.org> ---
Created attachment 131504
  --> https://bugs.freedesktop.org/attachment.cgi?id=131504&action=edit
output of `lspci -nnnnnnn -vvvvvvvvv'

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[Bug 101184] [NVE6] [bisected] Panic on boot with GK106

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=101184

S. Gilles <sgilles-8yXg+M/94Z32fBVCVOL8/A@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[bisected] Panic on boot    |[NVE6] [bisected] Panic on
                   |with GK106                  |boot with GK106

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[Bug 101184] [NVE6] [bisected] Panic on boot with GK106

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=101184

--- Comment #2 from Ben Skeggs <skeggsb-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
That's, uh, rather strange.  Is this fully reproducible?

Could I also see a kernel log with "nouveau.debug=debug" from a working kernel?

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[Bug 101184] [NVE6] [bisected] Panic on boot with GK106

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=101184

--- Comment #3 from S. Gilles <sgilles-8yXg+M/94Z32fBVCVOL8/A@public.gmane.org> ---
It certainly feels reproducible.  I've tested ~20 boots past the listed commit,
and ~10 from very close to before it, and if that commit isn't the dividing
line, it's doing a very good job of pretending to be. (I agree with you that it
looks pretty harmless, though.)

I'm about to attach a dmesg from a working kernel (4.11.0-rc4) with
"nouveau.modeset=1 nouveau.config=NvGrUseFW=1 nouveau.debug=debug" (my standard
command line has "nouveau.modeset=1 nouveau.config=NvGrUseFW=1" if it matters).

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[Bug 101184] [NVE6] [bisected] Panic on boot with GK106

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=101184

--- Comment #4 from S. Gilles <sgilles-8yXg+M/94Z32fBVCVOL8/A@public.gmane.org> ---
Created attachment 131565
  --> https://bugs.freedesktop.org/attachment.cgi?id=131565&action=edit
output of dmesg on (working) 4.11.0-rc4 with nouveau.debug=debug

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[Bug 101184] [NVE6] [bisected] Panic on boot with GK106

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https://bugs.freedesktop.org/show_bug.cgi?id=101184

--- Comment #5 from S. Gilles <sgilles-8yXg+M/94Z32fBVCVOL8/A@public.gmane.org> ---
I just reverted e4311ee51d1e2676001b2d8fcefd92bdd79aad85 on -mainline, and the
resulting kernel doesn't panic.  It doesn't receive input from any USB devices,
but I think that's probably unrelated. :)

Following that, I reset to -mainline, then went through the four changes of the
commit and tried reverting them individually.  Reverting three of them does
nothing, but reverting the change to
drivers/gpu/drm/nouveau/nvkm/subdev/therm/fan.c does prevent the panic.

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[Bug 101184] [NVE6] [bisected] Panic on boot with GK106

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=101184

--- Comment #6 from Ben Skeggs <skeggsb-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 131704
  --> https://bugs.freedesktop.org/attachment.cgi?id=131704&action=edit
test fix

Can you give this patch a try please?

I'm not 100% convinced this is the issue here, but I'd like to rule it in/out. 
I have identical hardware to a couple of the other reporters of this issue, but
have been completely unable to reproduce for unknown reasons.

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[Bug 101184] [NVE6] [bisected] Panic on boot with GK106

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https://bugs.freedesktop.org/show_bug.cgi?id=101184

--- Comment #7 from Karol Herbst <karolherbst-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
(In reply to Ben Skeggs from comment #6)
> Created attachment 131704 [details] [review]
> test fix
> 
> Can you give this patch a try please?
> 
> I'm not 100% convinced this is the issue here, but I'd like to rule it
> in/out.  I have identical hardware to a couple of the other reporters of
> this issue, but have been completely unable to reproduce for unknown reasons.

I can reproduce the issue and I never got the crash with this patch, but I also
only tried a few times. Maybe if you ask others with that issue to try it out
you get enough confirmations?

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[Bug 101184] [NVE6] [bisected] Panic on boot with GK106

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=101184

Karol Herbst <karolherbst-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mrblooter-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org

--- Comment #8 from Karol Herbst <karolherbst-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
*** Bug 101273 has been marked as a duplicate of this bug. ***

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[Bug 101184] [NVE6] [bisected] Panic on boot with GK106

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https://bugs.freedesktop.org/show_bug.cgi?id=101184

--- Comment #9 from S. Gilles <sgilles-8yXg+M/94Z32fBVCVOL8/A@public.gmane.org> ---
(In reply to Ben Skeggs from comment #6)
> Created attachment 131704 [details] [review]
> test fix
> 
> Can you give this patch a try please?

I built against -mainline just now. Without the patch, I get the panic, and
with the patch, I get no panic.  I'll call that successful.

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[Bug 101184] [NVE6] [bisected] Panic on boot with GK106

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https://bugs.freedesktop.org/show_bug.cgi?id=101184

--- Comment #10 from ingo66 <ingo.rybaczyk-zqRNUXuvxA0b1SvskN2V4Q@public.gmane.org> ---
Hello,

I have test the patch for linux 4.11.3 with the driver xf86-video-nouveau
1.0.15 and now my system starts without a kernel panic.

Without the patch only linux < 4.11.3 start correct.

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[Bug 101184] [NVE6] [bisected] Panic on boot with GK106

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https://bugs.freedesktop.org/show_bug.cgi?id=101184

--- Comment #11 from mrblooter-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org ---
I can also confirm that it fixed the kernel panics for me with the patch
applied.

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[Bug 101184] [NVE6] [bisected] Panic on boot with GK106

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https://bugs.freedesktop.org/show_bug.cgi?id=101184

--- Comment #12 from mrblooter-PkbjNfxxIARBDgjK7y7TUQ@public.gmane.org ---
Using kernel 4.11.5 fixed this.

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[Bug 101184] [NVE6] [bisected] Panic on boot with GK106

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https://bugs.freedesktop.org/show_bug.cgi?id=101184

S. Gilles <sgilles-8yXg+M/94Z32fBVCVOL8/A@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #13 from S. Gilles <sgilles-8yXg+M/94Z32fBVCVOL8/A@public.gmane.org> ---
It appears the fix has been merged into mainline as
b4e382ca7586a63b6c1e5221ce0863ff867c2df6 "drm/nouveau/tmr: fully separate alarm
execution/pending lists". I can also confirm that unpatched -mainline now boots
- thank you for the fix!

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