diff options
| author | Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> | 2006-10-26 21:14:23 +0200 |
|---|---|---|
| committer | Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> | 2006-10-26 21:14:23 +0200 |
| commit | b4fba1679b6156e3ca6f053b44cae0b003febe7f (patch) | |
| tree | 2bdae612350792621ffeb792c8778ffcf1d33f68 | |
| parent | 7ea059ae076c50f2012dee2ccbb8d41745705383 (diff) | |
Add a one-page hole in the file offset space between buffers.
| -rw-r--r-- | linux-core/drm_ttm.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/linux-core/drm_ttm.c b/linux-core/drm_ttm.c index 7344acce..13bec48b 100644 --- a/linux-core/drm_ttm.c +++ b/linux-core/drm_ttm.c @@ -489,14 +489,20 @@ int drm_ttm_object_create(drm_device_t * dev, unsigned long size, map->size = ttm->num_pages * PAGE_SIZE; map->handle = (void *)object; + /* + * Add a one-page "hole" to the block size to avoid the mm subsystem + * merging vmas. + * FIXME: Is this really needed? + */ + list->file_offset_node = drm_mm_search_free(&dev->offset_manager, - ttm->num_pages, 0, 0); + ttm->num_pages + 1, 0, 0); if (!list->file_offset_node) { drm_ttm_object_remove(dev, object); return -ENOMEM; } list->file_offset_node = drm_mm_get_block(list->file_offset_node, - ttm->num_pages, 0); + ttm->num_pages + 1, 0); list->hash.key = list->file_offset_node->start; |