[PATCH] cpuset: number_of_cpusets optimization

[powerpc.git] / include / linux / cpuset.h

diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
index 24062a1..34081c1 100644 (file)
--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -14,17 +14,36 @@
 
 #ifdef CONFIG_CPUSETS
 
+extern int number_of_cpusets;  /* How many cpusets are defined in system? */
+
 extern int cpuset_init(void);
 extern void cpuset_init_smp(void);
 extern void cpuset_fork(struct task_struct *p);
 extern void cpuset_exit(struct task_struct *p);
-extern cpumask_t cpuset_cpus_allowed(const struct task_struct *p);
+extern cpumask_t cpuset_cpus_allowed(struct task_struct *p);
+extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
 void cpuset_init_current_mems_allowed(void);
-void cpuset_update_current_mems_allowed(void);
-void cpuset_restrict_to_mems_allowed(unsigned long *nodes);
+void cpuset_update_task_memory_state(void);
+#define cpuset_nodes_subset_current_mems_allowed(nodes) \
+               nodes_subset((nodes), current->mems_allowed)
 int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl);
-extern int cpuset_zone_allowed(struct zone *z, unsigned int __nocast gfp_mask);
+
+extern int __cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask);
+static int inline cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask)
+{
+       return number_of_cpusets <= 1 || __cpuset_zone_allowed(z, gfp_mask);
+}
+
 extern int cpuset_excl_nodes_overlap(const struct task_struct *p);
+
+#define cpuset_memory_pressure_bump()                          \
+       do {                                                    \
+               if (cpuset_memory_pressure_enabled)             \
+                       __cpuset_memory_pressure_bump();        \
+       } while (0)
+extern int cpuset_memory_pressure_enabled;
+extern void __cpuset_memory_pressure_bump(void);
+
 extern struct file_operations proc_cpuset_operations;
 extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer);
 
@@ -40,17 +59,21 @@ static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p)
        return cpu_possible_map;
 }
 
+static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
+{
+       return node_possible_map;
+}
+
 static inline void cpuset_init_current_mems_allowed(void) {}
-static inline void cpuset_update_current_mems_allowed(void) {}
-static inline void cpuset_restrict_to_mems_allowed(unsigned long *nodes) {}
+static inline void cpuset_update_task_memory_state(void) {}
+#define cpuset_nodes_subset_current_mems_allowed(nodes) (1)
 
 static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
 {
        return 1;
 }
 
-static inline int cpuset_zone_allowed(struct zone *z,
-                                       unsigned int __nocast gfp_mask)
+static inline int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask)
 {
        return 1;
 }
@@ -60,6 +83,8 @@ static inline int cpuset_excl_nodes_overlap(const struct task_struct *p)
        return 1;
 }
 
+static inline void cpuset_memory_pressure_bump(void) {}
+
 static inline char *cpuset_task_status_allowed(struct task_struct *task,
                                                        char *buffer)
 {