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drm/ttm: Optimize ttm_eu_backoff_reservation

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Avoid the ttm_bo_unreserve() spinlocks by calling
ttm_eu_backoff_reservation_locked under the lru spinlock.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jerome Glisse <j.glisse@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Thomas Hellstrom 2010-11-17 12:28:27 +00:00 committed by Dave Airlie
parent 2357cbe5f4
commit 68c4fa31aa
1 changed files with 8 additions and 7 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

15
drivers/gpu/drm/ttm/ttm_execbuf_util.c
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@ -101,15 +101,16 @@ static int ttm_eu_wait_unreserved_locked(struct list_head *list,
void ttm_eu_backoff_reservation(struct list_head *list)
{
struct ttm_validate_buffer *entry;
struct ttm_bo_global *glob;
list_for_each_entry(entry, list, head) {
struct ttm_buffer_object *bo = entry->bo;
if (!entry->reserved)
continue;
if (list_empty(list))
return;
entry->reserved = false;
ttm_bo_unreserve(bo);
}
entry = list_first_entry(list, struct ttm_validate_buffer, head);
glob = entry->bo->glob;
spin_lock(&glob->lru_lock);
ttm_eu_backoff_reservation_locked(list);
spin_unlock(&glob->lru_lock);
}
EXPORT_SYMBOL(ttm_eu_backoff_reservation);