writeback: implement memcg writeback domain based throttling

[cascardo/linux.git] / include / linux / memcontrol.h

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index e3177be..c3eb19e 100644 (file)
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -392,6 +392,8 @@ enum {
 
 struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg);
 struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb);
+void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pavail,
+                        unsigned long *pdirty, unsigned long *pwriteback);
 
 #else  /* CONFIG_CGROUP_WRITEBACK */
 
@@ -400,6 +402,13 @@ static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb)
        return NULL;
 }
 
+static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb,
+                                      unsigned long *pavail,
+                                      unsigned long *pdirty,
+                                      unsigned long *pwriteback)
+{
+}
+
 #endif /* CONFIG_CGROUP_WRITEBACK */
 
 struct sock;