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| author | Dave Airlie <airlied@redhat.com> | 2010-11-22 13:24:40 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2010-11-22 13:24:40 +1000 |
| commit | d6ea88865d3e5b0c62040531310c1f2c6a994f46 (patch) | |
| tree | b80a7cbc6eeab003b412e3037fd335ce9d572f67 /include/drm/ttm/ttm_bo_driver.h | |
| parent | 27641c3f003e7f3b6585c01d8a788883603eb262 (diff) | |
| download | lwn-d6ea88865d3e5b0c62040531310c1f2c6a994f46.tar.gz lwn-d6ea88865d3e5b0c62040531310c1f2c6a994f46.zip | |
drm/ttm: Add a bo list reserve fastpath (v2)
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>
Diffstat (limited to 'include/drm/ttm/ttm_bo_driver.h')
| -rw-r--r-- | include/drm/ttm/ttm_bo_driver.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h index 8e0c848326b6..95068e6024db 100644 --- a/include/drm/ttm/ttm_bo_driver.h +++ b/include/drm/ttm/ttm_bo_driver.h @@ -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 * |