xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/i915/execlists: Switch to rb_root_cached

Browse Source 
The kernel recently gained an augmented rbtree with the purpose of
cacheing the leftmost element of the rbtree, a frequent optimisation to
avoid calls to rb_first() which is also employed by the
execlists->queue. Switch from our open-coded cache to the library.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180629075348.27358-9-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2018-06-29 08:53:20 +01:00
parent cb4dc8daf4
commit 655250a8d1
4 changed files with 19 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/drm/i915/intel_ringbuffer.h
View File

@@ -292,12 +292,7 @@ struct intel_engine_execlists {
/**
* @queue: queue of requests, in priority lists
*/
struct rb_root queue;
/**
* @first: leftmost level in priority @queue
*/
struct rb_node *first;
struct rb_root_cached queue;
/**
* @csb_read: control register for Context Switch buffer