[Intel-gfx] [PATCH 03/19] drm/i915: Micro-optimise gen8_ppgtt_insert_entries()

[Tvrtko Ursulin]

On 02/02/2017 15:32, Chris Wilson wrote:
> On Thu, Feb 02, 2017 at 03:02:32PM +0000, Chris Wilson wrote:
>> Improve the sg iteration and in hte process eliminate a bug in
>> miscomputing the pml4 length as orig_nents<<PAGE_SHIFT is no longer the
>> full length of the sg table.
>>
>
> which fixes a corner case of 0c40ce130e38
> Fixes: 0c40ce130e38 ("drm/i915: Trim the object sg table")

What do you mean? oring_nents is definitely the full length of the sg 
table, especially after i915_sg_trim. Before it orig_nents was often 
larger than the real length of the sg table.

Regards,

Tvrtko