diff options
| author | Thomas Hellstrom <thellstrom@vmware.com> | 2019-03-05 08:24:35 +0100 |
|---|---|---|
| committer | Thomas Hellstrom <thellstrom@vmware.com> | 2019-11-06 13:30:27 +0100 |
| commit | 61335d7a5a2d26173160198f5257bea072dfe086 (patch) | |
| tree | e27b26997552e188ad5c83411519d1c7af4e9507 /drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | |
| parent | b7468b15d27106d24fb30d543d1fbbc6756ae7ca (diff) | |
drm/vmwgfx: Use an RBtree instead of linked list for MOB resources
With emulated coherent memory we need to be able to quickly look up
a resource from the MOB offset. Instead of traversing a linked list with
O(n) worst case, use an RBtree with O(log n) worst case complexity.
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_drv.h')
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h index 7f2cce016687..d5fa9b72c8ff 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h @@ -100,7 +100,7 @@ struct vmw_fpriv { /** * struct vmw_buffer_object - TTM buffer object with vmwgfx additions * @base: The TTM buffer object - * @res_list: List of resources using this buffer object as a backing MOB + * @res_tree: RB tree of resources using this buffer object as a backing MOB * @pin_count: pin depth * @cpu_writers: Number of synccpu write grabs. Protected by reservation when * increased. May be decreased without reservation. @@ -111,7 +111,7 @@ struct vmw_fpriv { */ struct vmw_buffer_object { struct ttm_buffer_object base; - struct list_head res_list; + struct rb_root res_tree; s32 pin_count; atomic_t cpu_writers; /* Not ref-counted. Protected by binding_mutex */ @@ -160,8 +160,8 @@ struct vmw_res_func; * pin-count greater than zero. It is not on the resource LRU lists and its * backup buffer is pinned. Hence it can't be evicted. * @func: Method vtable for this resource. Immutable. + * @mob_node; Node for the MOB backup rbtree. Protected by @backup reserved. * @lru_head: List head for the LRU list. Protected by @dev_priv::resource_lock. - * @mob_head: List head for the MOB backup list. Protected by @backup reserved. * @binding_head: List head for the context binding list. Protected by * the @dev_priv::binding_mutex * @res_free: The resource destructor. @@ -182,8 +182,8 @@ struct vmw_resource { unsigned long backup_offset; unsigned long pin_count; const struct vmw_res_func *func; + struct rb_node mob_node; struct list_head lru_head; - struct list_head mob_head; struct list_head binding_head; struct vmw_resource_dirty *dirty; void (*res_free) (struct vmw_resource *res); @@ -737,7 +737,7 @@ void vmw_resource_dirty_update(struct vmw_resource *res, pgoff_t start, */ static inline bool vmw_resource_mob_attached(const struct vmw_resource *res) { - return !list_empty(&res->mob_head); + return !RB_EMPTY_NODE(&res->mob_node); } /** |