[Bug 104192] [amdgpu][VEGA10] regular lockups with VM_L2_PROTECTION_FAULT_STATUS

[Bug 104192] [amdgpu][VEGA10] regular lockups with VM_L2_PROTECTION_FAULT_STATUS

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https://bugs.freedesktop.org/show_bug.cgi?id=104192

            Bug ID: 104192
           Summary: [amdgpu][VEGA10] regular lockups with
                    VM_L2_PROTECTION_FAULT_STATUS
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: tomenglund26@gmail.com

i have been having somewhat unreproduceable lockups with my rx 56 vega all
going from 4.12 amd-staging up until 4.15-rc2 where its mainlined. but for some
reason i can reproduce it now with simply just open pavucontrol, and weirdly
enough only that.

i can properly play games, dirt rally, cs:go, run benchmarks or just leave the
computer on for days. but as fast as i open pavucontrol it lockups and this
happends in dmesg. and i dont seem to be all alone with it either, here is a
user with a rx 64 vega on archlinux having same issue/errors. 
https://bbs.archlinux.org/viewtopic.php?id=232519


amdgpu 0000:03:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000
amdgpu 0000:03:00.0:   at page 0x0000000000000000 from 27
amdgpu 0000:03:00.0: [gfxhub] VMC page fault (src_id:0 ring:171 vm_id:4
pas_id:0)

System info:
Radeon RX Vega (VEGA10 / DRM 3.23.0 / 4.15.0-rc2-mainline, LLVM 6.0.0)
Mesa 17.4.0-devel (git-4c7af87fb9)

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[Bug 104192] [amdgpu][VEGA10] regular lockups with VM_L2_PROTECTION_FAULT_STATUS

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https://bugs.freedesktop.org/show_bug.cgi?id=104192

--- Comment #1 from ejr.phone@gmail.com ---
I've ran into this bug, can you confirm this fixes it and is the same issue? 

I downgraded mesa-git to 109de3049d. I believe anything before Oct. 26th works
for me. 3ba973fe37 breaks but that's all the way at Oct. 30th. I haven't binary
searched yet to find the offending commit.

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[Bug 104192] [amdgpu][VEGA10] regular lockups with VM_L2_PROTECTION_FAULT_STATUS

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https://bugs.freedesktop.org/show_bug.cgi?id=104192

--- Comment #2 from ejr.phone@gmail.com ---
Alright I figured it out for me, there was a regression in llvm/clang which was
giving me protection faults. I rolled back my llvm a week and built mesa with
it and it works fine now.

Hope that helps people. I'll continue looking into what caused it

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[Bug 104192] [amdgpu][VEGA10] regular lockups with VM_L2_PROTECTION_FAULT_STATUS

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https://bugs.freedesktop.org/show_bug.cgi?id=104192

--- Comment #3 from Tom Englund <tomenglund26@gmail.com> ---
(In reply to ejr.phone from comment #2)
> Alright I figured it out for me, there was a regression in llvm/clang which
> was giving me protection faults. I rolled back my llvm a week and built mesa
> with it and it works fine now.
> 
> Hope that helps people. I'll continue looking into what caused it

yeah was just about to say it still froze with same errors on that mesa commit.
time to try rollback llvm then.

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[Bug 104192] [amdgpu][VEGA10] regular lockups with VM_L2_PROTECTION_FAULT_STATUS

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--- Comment #4 from Tom Englund <tomenglund26@gmail.com> ---
(In reply to Tom Englund from comment #3)
> (In reply to ejr.phone from comment #2)
> > Alright I figured it out for me, there was a regression in llvm/clang which
> > was giving me protection faults. I rolled back my llvm a week and built mesa
> > with it and it works fine now.
> > 
> > Hope that helps people. I'll continue looking into what caused it
> 
> yeah was just about to say it still froze with same errors on that mesa
> commit. time to try rollback llvm then.

llvm-svn revision 320250 gives me the freezes meanwhile, 317901 doesnt.
so its somewhere in between that, not sure what tooling svn have for bisecting,
like git bisect. but perhaps that helps someone.

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[Bug 104192] [amdgpu][VEGA10] regular lockups with VM_L2_PROTECTION_FAULT_STATUS

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https://bugs.freedesktop.org/show_bug.cgi?id=104192

--- Comment #5 from Ben <9parsonsb@gmail.com> ---
I am the user from the Arch Forums mentioned in comment #0. Is there anything I
can do to help this along?

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[Bug 104192] [amdgpu][VEGA10] regular lockups with VM_L2_PROTECTION_FAULT_STATUS

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--- Comment #6 from ejr.phone@gmail.com ---
looks like #104001 and #104159 are duplicates

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[Bug 104192] [amdgpu][VEGA10] regular lockups with VM_L2_PROTECTION_FAULT_STATUS

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--- Comment #7 from Felix Schwarz <felix.schwarz@oss.schwarz.eu> ---
(In reply to Tom Englund from comment #4)
> so its somewhere in between that, not sure what tooling svn have for
> bisecting, like git bisect. but perhaps that helps someone.

You can use git-svn for bisecting. :-)

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[Bug 104192] [amdgpu][VEGA10] regular lockups with VM_L2_PROTECTION_FAULT_STATUS

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--- Comment #8 from ojab <ojab@ojab.ru> ---
JFYI: llvm has official git mirror for all repos
https://llvm.org/docs/GettingStarted.html#git-mirror

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[Bug 104192] [amdgpu][VEGA10] regular lockups with VM_L2_PROTECTION_FAULT_STATUS

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--- Comment #9 from Michel Dänzer <michel@daenzer.net> ---
FWIW, I bisected some piglit regressions to LLVM SVN r319894.

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[Bug 104192] [amdgpu][VEGA10] regular lockups with VM_L2_PROTECTION_FAULT_STATUS

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--- Comment #10 from Tom Englund <tomenglund26@gmail.com> ---
(In reply to Michel Dänzer from comment #9)
> FWIW, I bisected some piglit regressions to LLVM SVN r319894.

thanks, that gave me some starting points to bisecting, narrowed things down
now to where r319882 works while r319894 freezes. starting to look like the
same regression you are facing.

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[Bug 104192] [amdgpu][VEGA10] regular lockups with VM_L2_PROTECTION_FAULT_STATUS

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--- Comment #11 from Tom Englund <tomenglund26@gmail.com> ---
(In reply to Tom Englund from comment #10)
> (In reply to Michel Dänzer from comment #9)
> > FWIW, I bisected some piglit regressions to LLVM SVN r319894.
> 
> thanks, that gave me some starting points to bisecting, narrowed things down
> now to where r319882 works while r319894 freezes. starting to look like the
> same regression you are facing.

after yet another compilation, r319893 works. so it would mean this commit is
the cause for the freezes/errors.

https://github.com/llvm-mirror/llvm/commit/3b06fccc7749b974d2905fe852b389b4697485b7

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--- Comment #12 from Tom Englund <tomenglund26@gmail.com> ---
the commit causing this have been reverted upstream, see
https://reviews.llvm.org/rL320466 . so from 320466 and up. things work again.

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[Bug 104192] [amdgpu][VEGA10] regular lockups with VM_L2_PROTECTION_FAULT_STATUS

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Tom Englund <tomenglund26@gmail.com> changed:

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

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