[Bug 83998] New: Oopses on R9270X using UVD since radeon/uvd: use PIPE_USAGE_STAGING for msg&fb buffers

[Bug 83998] New: Oopses on R9270X using UVD since radeon/uvd: use PIPE_USAGE_STAGING for msg&fb buffers

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https://bugs.freedesktop.org/show_bug.cgi?id=83998

          Priority: medium
            Bug ID: 83998
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Oopses on R9270X using UVD since radeon/uvd: use
                    PIPE_USAGE_STAGING for msg&fb buffers
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: adf.lists@gmail.com
          Hardware: Other
            Status: NEW
           Version: git
         Component: Drivers/Gallium/radeonsi
           Product: Mesa

R9270X Getting rareish Oopses and once oomkiller since -

commit 6327b584155d040ae089e65fd6747186bdd9666b
Author: Christian König <christian.koenig@amd.com>
Date:   Thu Sep 11 09:50:00 2014 +0200

    radeon/uvd: use PIPE_USAGE_STAGING for msg&fb buffers

    That better matches the actual userspace use case, the
    kernel will force it to VRAM if the hardware requires it.

To trigger this I need to repeatedly start mplayer using uvd - it's takes some
time, I ended up making a script to do it for me while AFK.

I am 99% sure the above is it - I spent a day and a half trying on the commit
before (radeon/video: use the hw to initial clear the buffers) with no crash.

The Oopses don't mention radeon or uvd.

They will hit as soon as mplayer launches before it renders anything - screen
locked, no mouse cursor or vt switch but SysRq works, box is still up in some
ways for a while (one time I had music playing for 30s-1min after).

One time oomkiller put on its blindfold and ran around killing :-)

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[Bug 83998] Oopses on R9270X using UVD since radeon/uvd: use PIPE_USAGE_STAGING for msg&fb buffers

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https://bugs.freedesktop.org/show_bug.cgi?id=83998

--- Comment #1 from Andy Furniss <adf.lists@gmail.com> ---
Created attachment 106433
  --> https://bugs.freedesktop.org/attachment.cgi?id=106433&action=edit
Oops uvd

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[Bug 83998] Oopses on R9270X using UVD since radeon/uvd: use PIPE_USAGE_STAGING for msg&fb buffers

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https://bugs.freedesktop.org/show_bug.cgi?id=83998

--- Comment #2 from Andy Furniss <adf.lists@gmail.com> ---
Created attachment 106434
  --> https://bugs.freedesktop.org/attachment.cgi?id=106434&action=edit
oom-killer uvd

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[Bug 83998] Oopses on R9270X using UVD since radeon/uvd: use PIPE_USAGE_STAGING for msg&fb buffers

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https://bugs.freedesktop.org/show_bug.cgi?id=83998

--- Comment #3 from Aaron B <aaronbottegal@gmail.com> ---
If you use Chrom(e/ium)/Firefox, can you make sure hardware accel is enabled
and see if it crashes randomly using them? I wanna see if you have other same
symptoms I have with random crashing on my system.

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[Bug 83998] Oopses on R9270X using UVD since radeon/uvd: use PIPE_USAGE_STAGING for msg&fb buffers

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https://bugs.freedesktop.org/show_bug.cgi?id=83998

--- Comment #4 from Michel Dänzer <michel@daenzer.net> ---
(In reply to comment #3)
> I wanna see if you have other same symptoms I have with random crashing on my
> system.

Aaron, I don't think this bug is related to yours.

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[Bug 83998] Oopses on R9270X using UVD since radeon/uvd: use PIPE_USAGE_STAGING for msg&fb buffers

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https://bugs.freedesktop.org/show_bug.cgi?id=83998

--- Comment #5 from Andy Furniss <adf.lists@gmail.com> ---
This bug is still alive for me.

Have randomly tested and reproduced since reporting and failed to reproduce
with 

6327b584155d040ae089e65fd6747186bdd9666b reverted.

Just retried with the new agd5f drm-next-319-wip and it's still there - though
this time I got and oops which mentions radeon/ttm so uploading.

To produce I am running a script running mplayer on various blu-rays on hard
disk.

It's not aggressive - run for 10 sec sleep for three ....

I added a counter and it got up to 29 before oopsing.

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[Bug 83998] Oopses on R9270X using UVD since radeon/uvd: use PIPE_USAGE_STAGING for msg&fb buffers

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https://bugs.freedesktop.org/show_bug.cgi?id=83998

--- Comment #6 from Andy Furniss <adf.lists@gmail.com> ---
Created attachment 109744
  --> https://bugs.freedesktop.org/attachment.cgi?id=109744&action=edit
kernel log with new oops at end

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[Bug 83998] Oopses on R9270X using UVD since radeon/uvd: use PIPE_USAGE_STAGING for msg&fb buffers

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https://bugs.freedesktop.org/show_bug.cgi?id=83998

--- Comment #7 from Andy Furniss <adf.lists@gmail.com> ---
Created attachment 110298
  --> https://bugs.freedesktop.org/attachment.cgi?id=110298&action=edit
different trace with newer kernel

This is getting harder to trigger, started to think it was fixed.

Haven't triggered with mpv yet, but can still just with mplayer.

On third attempt, 115 starts in CPUs set to perf (may help trigger, but not
sure).

Uploading because current drm-next-219-wip has some fence changes and the trace
starts with -

radeon_fence_signaled

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[Bug 83998] Oopses on R9270X using UVD since radeon/uvd: use PIPE_USAGE_STAGING for msg&fb buffers

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https://bugs.freedesktop.org/show_bug.cgi?id=83998

--- Comment #8 from Andy Furniss <adf.lists@gmail.com> ---
Created attachment 110470
  --> https://bugs.freedesktop.org/attachment.cgi?id=110470&action=edit
Another different trace

Newer kernel different trace - BUG this time.

Slightly different from normal both trace and behavior, in that it froze on
quit and the screen was still showing the vid.

Due to it being a bit different I tried again - same result, both died within 5
minutes. I then reverted the suspect commit in case it was a different issue,
went out came back and it was up to 500 and still going OK, so it does seem to
be the same issue.

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[Bug 83998] Oopses on R9270X using UVD since radeon/uvd: use PIPE_USAGE_STAGING for msg&fb buffers

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https://bugs.freedesktop.org/show_bug.cgi?id=83998

--- Comment #9 from Christian König <deathsimple@vodafone.de> ---
That seems to be some kind of random kernel memory corruption, triggered by
using PIPE_USAGE_STAGING for your case.

Does anybody have any good idea how to figure out what this is?

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[Bug 83998] Oopses on R9270X using UVD since radeon/uvd: use PIPE_USAGE_STAGING for msg&fb buffers

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https://bugs.freedesktop.org/show_bug.cgi?id=83998

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Drivers/Gallium/radeonsi    |DRM/Radeon
            Version|git                         |unspecified
            Product|Mesa                        |DRI

--- Comment #10 from Michel Dänzer <michel@daenzer.net> ---
If there's an older kernel where this doesn't happen, it might be possible to
bisect.

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[Bug 83998] Oopses on R9270X using UVD since radeon/uvd: use PIPE_USAGE_STAGING for msg&fb buffers

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https://bugs.freedesktop.org/show_bug.cgi?id=83998

Andy Furniss <adf.lists@gmail.com> changed:

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

--- Comment #11 from Andy Furniss <adf.lists@gmail.com> ---
I did try older kernels, but after thinking one was OK which turned out to also
have the issue I decided bisecting was not really going to work.

I don't have the 270X anymore so marking as a dup of another report.

As noted in that report, it seems easier to provoke this with current kernels.

It's possible the mesa commit just changed some timing that exposed the issue
more.

Currently on Tonga I can provoke a similar issue (not oops - just ring stall)
and reverting the mesa commit in this bug doesn't help, but playing around with
cpufreq can change how easy it is to provoke.

*** This bug has been marked as a duplicate of bug 91009 ***

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