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drm/ttm: use try_lock in ttm_bo_delayed_delete again 

We only need to wait for the contended lock when the reservation object is
shared or when we want to remove everything. A trylock should be sufficient
in all other cases.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Roger He <Hongbo.He@amd.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2017-12-15 13:36:49 +01:00 committed by Alex Deucher
parent 3b1186fd2a
commit 827ed2b06b
1 changed files with 9 additions and 4 deletions
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7
drivers/gpu/drm/ttm/ttm_bo.c
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@ -586,13 +586,18 @@ static bool ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all)
ddestroy);
kref_get(&bo->list_kref);
list_move_tail(&bo->ddestroy, &removed);
spin_unlock(&glob->lru_lock);
if (remove_all || bo->resv != &bo->ttm_resv) {
spin_unlock(&glob->lru_lock);
reservation_object_lock(bo->resv, NULL);
spin_lock(&glob->lru_lock);
ttm_bo_cleanup_refs(bo, false, !remove_all, true);
} else if (reservation_object_trylock(bo->resv)) {
ttm_bo_cleanup_refs(bo, false, !remove_all, true);
}
kref_put(&bo->list_kref, ttm_bo_release_list);
spin_lock(&glob->lru_lock);
}