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    SubjectRe: [Intel-gfx] linux-next: Tree for Jul 25 [ call-trace: drm | drm-intel related? ]
    On Thu, Jul 25, 2013 at 07:15:03PM +0200, Sedat Dilek wrote:
    > On Thu, Jul 25, 2013 at 7:01 PM, Chris Wilson <chris@chris-wilson.co.uk> wrote:
    > > Basically boils down to either an object allocation failure or mmaping
    > > failure. I think dmesg with drm.debug=7 is the next step.
    >
    > Attached! Thanks for taking care.

    Hmm, looks like i915_gem_map_gtt fails, but no reason given, so can you
    please apply this for more debug:

    diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
    index 0563661..34e09bf 100644
    --- a/drivers/gpu/drm/i915/i915_gem.c
    +++ b/drivers/gpu/drm/i915/i915_gem.c
    @@ -1630,24 +1630,29 @@ i915_gem_mmap_gtt(struct drm_file *file,

    obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle));
    if (&obj->base == NULL) {
    + DRM_DRIVER_DEBUG("Unknown object handle %d\n", handle);
    ret = -ENOENT;
    goto unlock;
    }

    if (obj->base.size > dev_priv->gtt.mappable_end) {
    + DRM_DRIVER_DEBUG("Object (%d) larger than mappable aperture (%d) > %d\n",
    + (int)obj->base.size, (int)dev_priv->gtt.mappable_end);
    ret = -E2BIG;
    goto out;
    }

    if (obj->madv != I915_MADV_WILLNEED) {
    - DRM_ERROR("Attempting to mmap a purgeable buffer\n");
    + DRM_DRIVER_DEBUG("Attempting to mmap a purgeable buffer\n");
    ret = -EINVAL;
    goto out;
    }

    ret = i915_gem_object_create_mmap_offset(obj);
    - if (ret)
    + if (ret) {
    + DRM_DRIVER_DEBUG("Failed to allocate mmap offset (ret=%d)\n", ret);
    goto out;
    + }

    *offset = (u64)obj->base.map_list.hash.key << PAGE_SHIFT;

    --
    Chris Wilson, Intel Open Source Technology Centre

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