tree 751ea6d6485daaf248c374abb0398af4b2a770a5
parent cb422619976f3f1b71f68f0c1b5a764e9f90fb0c
author Chris Wilson <chris@chris-wilson.co.uk> 1443698306 +0100
committer Daniel Vetter <daniel.vetter@ffwll.ch> 1444226738 +0200

drm/i915: Add a tracepoint for the shrinker

Often it is very useful to know why we suddenly purge vast tracts of
memory and surprisingly up until now we didn't even have a tracepoint
for when we shrink our memory.

Note that there are slab_start/end tracepoints already, but those
don't cover the internal recursion when we directly call into our
shrinker code. Hence a separate tracepoint seems justified. Also note
that we don't really need a separate tracepoint for the actual amount
of pages freed since we already have an unbind tracpoint for that.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: Add a note that there's also slab_start/end and why they're
insufficient.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>