Changeset 4841104 in mainline for include/mm/frame.h

Timestamp:

2005-09-23T20:44:35Z (20 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

adecf496

Parents:

23443b2

Message:

Physical memory management work.
Add "attribute ((packed))" to frame_t so that it takes up less space.
Note that this is essential as there is lot of these structures.
Remove busy list from zone_t as it is redundant.

File:

• include/mm/frame.h (modified) (1 diff)

include/mm/frame.h

@@ -45 +45 @@
         frame_t *frames;        /**< array of frame_t structures in this zone */
         link_t free_head;       /**< list of free frame_t structures */
-        link_t busy_head;       /**< list of busy frame_t structures */
         count_t free_count;     /**< number of frame_t structures in free list */
-        count_t busy_count;     /**< number of frame_t structures in busy list */
+        count_t busy_count;     /**< number of frame_t structures not in free list */
         int flags;
 };
 
 struct frame {
-        count_t refcount;       /**< when > 0, the frame is in busy list, otherwise the frame is in free list */
-        link_t link;            /**< link either to frame_zone free or busy list */
-};
+        count_t refcount;       /**< when == 0, the frame is in free list */
+        link_t link;            /**< link to zone free list when refcount == 0 */
+} __attribute__ ((packed));
 
 extern spinlock_t zone_head_lock;       /**< this lock protects zone_head list */