[Intel-gfx] [PATCH] drm/i915: Reduce memory pressure during shrinker by preallocating swizzle pages

[Daniel Vetter]

On Mon, Dec 03, 2012 at 09:03:14PM +0000, Chris Wilson wrote:
> On a machine with bit17 swizzling, we need to store the bit17 of the
> physical page address in put-pages. This requires a memory allocation,
> on average less than a page, which may be difficult to satisfy is the
> request to put-pages is on behalf of the shrinker. We could allow that
> allocation to pull from the reserved memory pools, but it seems much
> safer to preallocate the array for tiled objects on affected machines.
> 
> v2: Export i915_gem_object_needs_bit17_swizzle() for reuse.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Missed this one here buried in another thread. Queued for -next, thanks
for the patch.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch