[Bug 91894] [snb] GPU Hangs since Kernel-4.2 upgrade (global/aliasing ppgtt issue?)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91894

--- Comment #10 from Chris Wilson <chris at chris-wilson.co.uk> ---
Can you please try:

diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index a953d4975b8c..bbf7d35ca906 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -585,7 +585,7 @@ i915_gem_execbuffer_reserve_vma(struct i915_vma *vma,
        uint64_t flags;
        int ret;

-       flags = PIN_USER;
+       flags = PIN_USER | PIN_GLOBAL;
        if (entry->flags & EXEC_OBJECT_NEEDS_GTT)
                flags |= PIN_GLOBAL;


on a recent kernel?

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