linux-kernel - Re: [Bug][5.18-rc0] Between commits ed4643521e6a and 34af78c4e616, appears warning "WARNING: CPU: 31 PID: 51848 at drivers/dma-buf/dma-fence-array.c:191 dma_fence_array_create+0x101/0x120" and some games stopped working.

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Message-ID: <CABXGCsPXcG4BUDr8AtmtWHZh7kTw6pFsSedhxiEcuej5S0oJ7Q@mail.gmail.com>
Date:   Tue, 18 Oct 2022 03:43:51 +0500
From:   Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>
To:     Christian König <ckoenig.leichtzumerken@...il.com>,
        "Deucher, Alexander" <alexander.deucher@....com>
Cc:     Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>
Subject: Re: [Bug][5.18-rc0] Between commits ed4643521e6a and 34af78c4e616,
 appears warning "WARNING: CPU: 31 PID: 51848 at drivers/dma-buf/dma-fence-array.c:191
 dma_fence_array_create+0x101/0x120" and some games stopped working.

On Wed, May 11, 2022 at 5:01 PM Christian König
<ckoenig.leichtzumerken@...il.com> wrote:
>
>
> We have implemented a workaround, but still don't know the exact root cause.
>
> If anybody wants to look into this it would be rather helpful to be able
> to reproduce the issue.
>
> Regards,
> Christian.

I see that issue was returned after this commit
dd80d9c8eecac8c516da5b240d01a35660ba6cb6 is the first bad commit
commit dd80d9c8eecac8c516da5b240d01a35660ba6cb6
Author: Christian König <christian.koenig@....com>
Date:   Thu Jul 14 10:23:38 2022 +0200

    drm/amdgpu: revert "partial revert "remove ctx->lock" v2"

    This reverts commit 94f4c4965e5513ba624488f4b601d6b385635aec.

    We found that the bo_list is missing a protection for its list entries.
    Since that is fixed now this workaround can be removed again.

    Signed-off-by: Christian König <christian.koenig@....com>
    Reviewed-by: Alex Deucher <alexander.deucher@....com>
    Signed-off-by: Alex Deucher <alexander.deucher@....com>

 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c  | 21 ++++++---------------
 drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c |  2 --
 drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h |  1 -
 3 files changed, 6 insertions(+), 18 deletions(-)

The games Forza Horizon 4 and Cyberpunk 2077 again hangs at start.


-- 
Best Regards,
Mike Gavrilov.