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

drm/ttm: Add a bo list reserve fastpath (v2)

Browse Source 
Makes it possible to reserve a list of buffer objects with a single
spin lock / unlock if there is no contention.
Should improve cpu usage on SMP kernels.

v2: Initialize private list members on reserve and don't call
ttm_bo_list_ref_sub() with zero put_count.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2010-11-22 13:24:40 +10:00
parent 27641c3f00
commit d6ea88865d
5 changed files with 186 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
include/drm/ttm/ttm_bo_driver.h
View File

@@ -864,6 +864,20 @@ extern int ttm_bo_reserve(struct ttm_buffer_object *bo,
bool interruptible,
bool no_wait, bool use_sequence, uint32_t sequence);
/**
* ttm_bo_reserve_locked:
*
* Similar to ttm_bo_reserve, but must be called with the glob::lru_lock
* spinlock held, and will not remove reserved buffers from the lru lists.
* The function may release the LRU spinlock if it needs to sleep.
*/
extern int ttm_bo_reserve_locked(struct ttm_buffer_object *bo,
bool interruptible,
bool no_wait, bool use_sequence,
uint32_t sequence);
/**
* ttm_bo_unreserve
*