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| author | Christian König <christian.koenig@amd.com> | 2020-06-09 15:47:33 +0300 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2020-06-23 16:46:06 +0300 |
| commit | 271e7decd707accfe6d4965b2c5e60d2d77c8e35 (patch) | |
| tree | a4a3cbd9cc257072ebd09363d76d3c63255d37d4 /drivers/gpu/drm/drm_mm.c | |
| parent | 41c0e78aae53099852dab4d1050c06a43c827eb3 (diff) | |
| download | linux-271e7decd707accfe6d4965b2c5e60d2d77c8e35.tar.xz | |
drm/mm: optimize find_hole() as well
Abort early if there isn't enough space to allocate from a subtree.
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Nirmoy Das <nirmoy.das@amd.com>
Link: https://patchwork.freedesktop.org/patch/370297/
Diffstat (limited to 'drivers/gpu/drm/drm_mm.c')
| -rw-r--r-- | drivers/gpu/drm/drm_mm.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c index 425fcd3590e8..177a5df0fe95 100644 --- a/drivers/gpu/drm/drm_mm.c +++ b/drivers/gpu/drm/drm_mm.c @@ -325,7 +325,7 @@ static struct drm_mm_node *best_hole(struct drm_mm *mm, u64 size) return best; } -static struct drm_mm_node *find_hole(struct drm_mm *mm, u64 addr) +static struct drm_mm_node *find_hole_addr(struct drm_mm *mm, u64 addr, u64 size) { struct rb_node *rb = mm->holes_addr.rb_node; struct drm_mm_node *node = NULL; @@ -333,6 +333,9 @@ static struct drm_mm_node *find_hole(struct drm_mm *mm, u64 addr) while (rb) { u64 hole_start; + if (rb_hole_addr_to_node(rb)->subtree_max_hole < size) + break; + node = rb_hole_addr_to_node(rb); hole_start = __drm_mm_hole_node_start(node); @@ -358,10 +361,10 @@ first_hole(struct drm_mm *mm, return best_hole(mm, size); case DRM_MM_INSERT_LOW: - return find_hole(mm, start); + return find_hole_addr(mm, start, size); case DRM_MM_INSERT_HIGH: - return find_hole(mm, end); + return find_hole_addr(mm, end, size); case DRM_MM_INSERT_EVICT: return list_first_entry_or_null(&mm->hole_stack, @@ -497,7 +500,7 @@ int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node) return -ENOSPC; /* Find the relevant hole to add our node to */ - hole = find_hole(mm, node->start); + hole = find_hole_addr(mm, node->start, 0); if (!hole) return -ENOSPC; |