tree 7433b151f076c956717fec54b2e42f14ef6723d8
parent 1d7cfea152cae6159aa30ceae38c3eaf13ea083c
author Chris Wilson <chris@chris-wilson.co.uk> 1287306116 +0100
committer Chris Wilson <chris@chris-wilson.co.uk> 1287568310 +0100

drm/i915: cache the last object lookup during pin_and_relocate()

The most frequent relocation within a batchbuffer is a contiguous sequence
of vertex buffer relocations, for which we can virtually eliminate the
drm_gem_object_lookup() overhead by caching the last handle to object
translation.

In doing so we refactor the pin and relocate retry loop out of
do_execbuffer into its own helper function and so improve the error
paths.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>