[Bug 93928] Tonga valley regression since drm/amdgpu: split VM mappings into smaller operations (v2)

[Bug 93928] Tonga valley regression since drm/amdgpu: split VM mappings into smaller operations (v2)

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https://bugs.freedesktop.org/show_bug.cgi?id=93928

            Bug ID: 93928
           Summary: Tonga valley regression since drm/amdgpu: split VM
                    mappings into smaller operations (v2)
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: adf.lists@gmail.com

R8285 agd5f drm-next-4.6-wip

Since below Unigine Valley renders mostly a screen full of colored blocks.

Doesn't affect desktop, Unreal Elemental or xonotic.

In case settings are relevant I run valley ultra quality fullscreen 1920x1080
8xAA

commit 8292e95e64134e8c81ccec25fb702f3c838c2a1e
Author: Christian König <christian.koenig@amd.com>
Date:   Mon Jan 25 14:27:31 2016 +0100

    drm/amdgpu: split VM mappings into smaller operations (v2)

    If we can't copy entries from the GTT or fill them with one command split
    up the mapping operation into multiple ones.

    v2: agd: rebase on upstream

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[Bug 93928] Tonga valley regression since drm/amdgpu: split VM mappings into smaller operations (v2)

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https://bugs.freedesktop.org/show_bug.cgi?id=93928

--- Comment #1 from Nicolai Hähnle <nhaehnle@gmail.com> ---
Hi Andy, do you have a screenshot? What version of Mesa are you using? Anything
in dmesg?

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[Bug 93928] Tonga valley regression since drm/amdgpu: split VM mappings into smaller operations (v2)

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https://bugs.freedesktop.org/show_bug.cgi?id=93928

--- Comment #2 from Christian König <deathsimple@vodafone.de> ---
Crap, that looks like I haven't pushed the latest version of that to our server
where Alex picket it up. There are numerous bugs in the version of the patch
which went upstream.

I'm going to take a look what went wrong as soon as I have time (going to
FOSDEM this weekend).

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[Bug 93928] Tonga valley regression since drm/amdgpu: split VM mappings into smaller operations (v2)

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https://bugs.freedesktop.org/show_bug.cgi?id=93928

--- Comment #3 from Alex Deucher <alexdeucher@gmail.com> ---
I'll drop them from my wip tree for now.

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[Bug 93928] Tonga valley regression since drm/amdgpu: split VM mappings into smaller operations (v2)

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https://bugs.freedesktop.org/show_bug.cgi?id=93928

--- Comment #4 from Andy Furniss <adf.lists@gmail.com> ---
(In reply to Alex Deucher from comment #3)
> I'll drop them from my wip tree for now.

OK and have a good time at FOSDEM

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[Bug 93928] Tonga valley regression since drm/amdgpu: split VM mappings into smaller operations (v2)

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https://bugs.freedesktop.org/show_bug.cgi?id=93928

--- Comment #5 from Andy Furniss <adf.lists@gmail.com> ---
There was nothing in dmesg.

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[Bug 93928] Tonga valley regression since drm/amdgpu: split VM mappings into smaller operations (v2)

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https://bugs.freedesktop.org/show_bug.cgi?id=93928

--- Comment #6 from Christian König <deathsimple@vodafone.de> ---
Created attachment 121411
  --> https://bugs.freedesktop.org/attachment.cgi?id=121411&action=edit
Possible fix

Please try the attached patch if you have time.

Completely untested (not even compiled), but should do most of the trick.

Need to check in detail when I'm back home.

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[Bug 93928] Tonga valley regression since drm/amdgpu: split VM mappings into smaller operations (v2)

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https://bugs.freedesktop.org/show_bug.cgi?id=93928

--- Comment #7 from Andy Furniss <adf.lists@gmail.com> ---
Patch is good, all seems OK so far.

Testing the version of drm-next-4.6-wip that I bisected as Alex has updated and
removed the fail commit from latest.

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[Bug 93928] Tonga valley regression since drm/amdgpu: split VM mappings into smaller operations (v2)

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https://bugs.freedesktop.org/show_bug.cgi?id=93928

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

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

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