Quoting Scott D Phillips (2018-02-08 00:16:34)
> Chris Wilson <ch...@chris-wilson.co.uk> writes:
> 
> > From: Scott D Phillips <scott.d.phill...@intel.com>
> >
> > Similar to the transformation applied to linear_to_ytiled, also align
> > each readback from the ytiled source to a cacheline (i.e. transfer a
> > whole cacheline from the source before moving on to the next column).
> > This will allow us to utilize movntqda (_mm_stream_si128) in a
> > subsequent patch to obtain near WB readback performance when accessing
> > the uncached ytiled memory, an order of magnitude improvement.
> 
> lgtm, or R-b if you want to take the authorship.

It's your work, so please keep the authorship and land the
improvements :)
-Chris
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