[Bug 101980] [g33 v4.9] gpu hung

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101980

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|drm/i915 gpu hung           |[g33 v4.9] gpu hung

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
Hmm, not much going on. The first thing that stood out as needing to be checked
is

     00000000_1e7ff000  8388608 36 00 [ 12c57 00 00 00 00 ] 12c57 Y dirty
render uncached

that is whether the alignment is correct for the unfenced Y buffer.

u32 i915_gem_fence_alignment(struct drm_i915_private *i915, u32 size,
                             unsigned int tiling, unsigned int stride)
{
        GEM_BUG_ON(!size);

        /*
         * Minimum alignment is 4k (GTT page size), but might be greater
         * if a fence register is needed for the object.
         */
        if (tiling == I915_TILING_NONE)
                return I915_GTT_MIN_ALIGNMENT;

        if (INTEL_GEN(i915) >= 4)
                return I965_FENCE_PAGE;

        /*
         * Previous chips need to be aligned to the size of the smallest
         * fence register that can contain the object.
         */
        return i915_gem_fence_size(i915, size, tiling, stride);
}

so that's clearly wrong. 

Can you please try a later kernel, say v4.12?

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