1 files changed, 247 insertions, 0 deletions
diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
new file mode 100644
index 00000000..e9eaec52
--- /dev/null
+++ b/include/linux/cpuset.h
@@ -0,0 +1,247 @@
+#ifndef _LINUX_CPUSET_H
+#define _LINUX_CPUSET_H
+/*
+ *  cpuset interface
+ *
+ *  Copyright (C) 2003 BULL SA
+ *  Copyright (C) 2004-2006 Silicon Graphics, Inc.
+ *
+ */
+
+#include <linux/sched.h>
+#include <linux/cpumask.h>
+#include <linux/nodemask.h>
+#include <linux/cgroup.h>
+#include <linux/mm.h>
+
+#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_update_active_cpus(void);
+extern void cpuset_cpus_allowed(struct task_struct *p, struct cpumask *mask);
+extern int cpuset_cpus_allowed_fallback(struct task_struct *p);
+extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
+#define cpuset_current_mems_allowed (current->mems_allowed)
+void cpuset_init_current_mems_allowed(void);
+int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask);
+
+extern int __cpuset_node_allowed_softwall(int node, gfp_t gfp_mask);
+extern int __cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask);
+
+static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
+{
+	return number_of_cpusets <= 1 ||
+		__cpuset_node_allowed_softwall(node, gfp_mask);
+}
+
+static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
+{
+	return number_of_cpusets <= 1 ||
+		__cpuset_node_allowed_hardwall(node, gfp_mask);
+}
+
+static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
+{
+	return cpuset_node_allowed_softwall(zone_to_nid(z), gfp_mask);
+}
+
+static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
+{
+	return cpuset_node_allowed_hardwall(zone_to_nid(z), gfp_mask);
+}
+
+extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
+					  const struct task_struct *tsk2);
+
+#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 const struct file_operations proc_cpuset_operations;
+struct seq_file;
+extern void cpuset_task_status_allowed(struct seq_file *m,
+					struct task_struct *task);
+
+extern int cpuset_mem_spread_node(void);
+extern int cpuset_slab_spread_node(void);
+
+static inline int cpuset_do_page_mem_spread(void)
+{
+	return current->flags & PF_SPREAD_PAGE;
+}
+
+static inline int cpuset_do_slab_mem_spread(void)
+{
+	return current->flags & PF_SPREAD_SLAB;
+}
+
+extern int current_cpuset_is_being_rebound(void);
+
+extern void rebuild_sched_domains(void);
+
+extern void cpuset_print_task_mems_allowed(struct task_struct *p);
+
+/*
+ * reading current mems_allowed and mempolicy in the fastpath must protected
+ * by get_mems_allowed()
+ */
+static inline void get_mems_allowed(void)
+{
+	current->mems_allowed_change_disable++;
+
+	/*
+	 * ensure that reading mems_allowed and mempolicy happens after the
+	 * update of ->mems_allowed_change_disable.
+	 *
+	 * the write-side task finds ->mems_allowed_change_disable is not 0,
+	 * and knows the read-side task is reading mems_allowed or mempolicy,
+	 * so it will clear old bits lazily.
+	 */
+	smp_mb();
+}
+
+static inline void put_mems_allowed(void)
+{
+	/*
+	 * ensure that reading mems_allowed and mempolicy before reducing
+	 * mems_allowed_change_disable.
+	 *
+	 * the write-side task will know that the read-side task is still
+	 * reading mems_allowed or mempolicy, don't clears old bits in the
+	 * nodemask.
+	 */
+	smp_mb();
+	--ACCESS_ONCE(current->mems_allowed_change_disable);
+}
+
+static inline void set_mems_allowed(nodemask_t nodemask)
+{
+	task_lock(current);
+	current->mems_allowed = nodemask;
+	task_unlock(current);
+}
+
+#else /* !CONFIG_CPUSETS */
+
+static inline int cpuset_init(void) { return 0; }
+static inline void cpuset_init_smp(void) {}
+
+static inline void cpuset_update_active_cpus(void)
+{
+	partition_sched_domains(1, NULL, NULL);
+}
+
+static inline void cpuset_cpus_allowed(struct task_struct *p,
+				       struct cpumask *mask)
+{
+	cpumask_copy(mask, cpu_possible_mask);
+}
+
+static inline int cpuset_cpus_allowed_fallback(struct task_struct *p)
+{
+	do_set_cpus_allowed(p, cpu_possible_mask);
+	return cpumask_any(cpu_active_mask);
+}
+
+static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
+{
+	return node_possible_map;
+}
+
+#define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
+static inline void cpuset_init_current_mems_allowed(void) {}
+
+static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
+{
+	return 1;
+}
+
+static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
+{
+	return 1;
+}
+
+static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
+{
+	return 1;
+}
+
+static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
+{
+	return 1;
+}
+
+static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
+{
+	return 1;
+}
+
+static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
+						 const struct task_struct *tsk2)
+{
+	return 1;
+}
+
+static inline void cpuset_memory_pressure_bump(void) {}
+
+static inline void cpuset_task_status_allowed(struct seq_file *m,
+						struct task_struct *task)
+{
+}
+
+static inline int cpuset_mem_spread_node(void)
+{
+	return 0;
+}
+
+static inline int cpuset_slab_spread_node(void)
+{
+	return 0;
+}
+
+static inline int cpuset_do_page_mem_spread(void)
+{
+	return 0;
+}
+
+static inline int cpuset_do_slab_mem_spread(void)
+{
+	return 0;
+}
+
+static inline int current_cpuset_is_being_rebound(void)
+{
+	return 0;
+}
+
+static inline void rebuild_sched_domains(void)
+{
+	partition_sched_domains(1, NULL, NULL);
+}
+
+static inline void cpuset_print_task_mems_allowed(struct task_struct *p)
+{
+}
+
+static inline void set_mems_allowed(nodemask_t nodemask)
+{
+}
+
+static inline void get_mems_allowed(void)
+{
+}
+
+static inline void put_mems_allowed(void)
+{
+}
+
+#endif /* !CONFIG_CPUSETS */
+
+#endif /* _LINUX_CPUSET_H */