Functions to remember reclaim priority per cgroup (as zone->prev_priority)
Signed-off-by: KAMEZAWA Hiroyuki <[email protected]>
include/linux/memcontrol.h | 23 +++++++++++++++++++++++
mm/memcontrol.c | 20 ++++++++++++++++++++
2 files changed, 43 insertions(+)
Index: linux-2.6.24-rc3-mm1/mm/memcontrol.c
===================================================================
--- linux-2.6.24-rc3-mm1.orig/mm/memcontrol.c 2007-11-27 11:19:51.000000000 +0900
+++ linux-2.6.24-rc3-mm1/mm/memcontrol.c 2007-11-27 11:22:14.000000000 +0900
@@ -132,6 +132,7 @@
*/
spinlock_t lru_lock;
unsigned long control_type; /* control RSS or RSS+Pagecache */
+ int prev_priority; /* for recording reclaim priority */
/*
* statistics.
*/
@@ -452,6 +453,25 @@
return (long) (active / (inactive + 1));
}
+/*
+ * prev_priority control...this will be used in memory reclaim path.
+ */
+int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
+{
+ return mem->prev_priority;
+}
+
+void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, int priority)
+{
+ if (priority < mem->prev_priority)
+ mem->prev_priority = priority;
+}
+
+void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, int priority)
+{
+ mem->prev_priority = priority;
+}
+
unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
struct list_head *dst,
unsigned long *scanned, int order,
Index: linux-2.6.24-rc3-mm1/include/linux/memcontrol.h
===================================================================
--- linux-2.6.24-rc3-mm1.orig/include/linux/memcontrol.h 2007-11-27 11:19:00.000000000 +0900
+++ linux-2.6.24-rc3-mm1/include/linux/memcontrol.h 2007-11-27 11:22:14.000000000 +0900
@@ -67,6 +67,11 @@
extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
+extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
+extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
+ int priority);
+extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
+ int priority);
#else /* CONFIG_CGROUP_MEM_CONT */
@@ -150,6 +155,24 @@
return 0;
}
+static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem,
+ int priority)
+{
+ return 0;
+}
+
+static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
+ int priority)
+{
+ return 0;
+}
+
+static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
+ int priority)
+{
+ return 0;
+}
+
#endif /* CONFIG_CGROUP_MEM_CONT */
#endif /* _LINUX_MEMCONTROL_H */
-
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