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

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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
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6
include/drm/ttm/ttm_execbuf_util.h
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@@ -41,7 +41,9 @@
* @bo: refcounted buffer object pointer.
* @new_sync_obj_arg: New sync_obj_arg for @bo, to be used once
* adding a new sync object.
* @reservied: Indicates whether @bo has been reserved for validation.
* @reserved: Indicates whether @bo has been reserved for validation.
* @removed: Indicates whether @bo has been removed from lru lists.
* @put_count: Number of outstanding references on bo::list_kref.
*/
struct ttm_validate_buffer {
@@ -49,6 +51,8 @@ struct ttm_validate_buffer {
struct ttm_buffer_object *bo;
void *new_sync_obj_arg;
bool reserved;
bool removed;
int put_count;
};
/**