linux-kernel - [PATCH 21/53] sched/headers: Move the NUMA balancing interfaces from <linux/sched.h> to <linux/sched/numa

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Date:   Wed,  8 Feb 2017 19:44:52 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Mike Galbraith <efault@....de>,
        Oleg Nesterov <oleg@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 21/53] sched/headers: Move the NUMA balancing interfaces from <linux/sched.h> to <linux/sched/numa_balancing.h>

Split out the interface between the scheduler and the MM which
deals with page fault driven NUMA balancing, into the new
<linux/sched/numa_balancing.h> header.

Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Mike Galbraith <efault@....de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 include/linux/sched.h                | 35 -----------------------------------
 include/linux/sched/numa_balancing.h | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+), 35 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 2e410594579c..f067a4209f7b 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1232,41 +1232,6 @@ static inline struct vm_struct *task_stack_vm_area(const struct task_struct *t)
 }
 #endif
 
-#define TNF_MIGRATED	0x01
-#define TNF_NO_GROUP	0x02
-#define TNF_SHARED	0x04
-#define TNF_FAULT_LOCAL	0x08
-#define TNF_MIGRATE_FAIL 0x10
-
-#ifdef CONFIG_NUMA_BALANCING
-extern void task_numa_fault(int last_node, int node, int pages, int flags);
-extern pid_t task_numa_group_id(struct task_struct *p);
-extern void set_numabalancing_state(bool enabled);
-extern void task_numa_free(struct task_struct *p);
-extern bool should_numa_migrate_memory(struct task_struct *p, struct page *page,
-					int src_nid, int dst_cpu);
-#else
-static inline void task_numa_fault(int last_node, int node, int pages,
-				   int flags)
-{
-}
-static inline pid_t task_numa_group_id(struct task_struct *p)
-{
-	return 0;
-}
-static inline void set_numabalancing_state(bool enabled)
-{
-}
-static inline void task_numa_free(struct task_struct *p)
-{
-}
-static inline bool should_numa_migrate_memory(struct task_struct *p,
-				struct page *page, int src_nid, int dst_cpu)
-{
-	return true;
-}
-#endif
-
 static inline struct pid *task_pid(struct task_struct *task)
 {
 	return task->pids[PIDTYPE_PID].pid;
diff --git a/include/linux/sched/numa_balancing.h b/include/linux/sched/numa_balancing.h
index 999182279f78..35d5fc77b4be 100644
--- a/include/linux/sched/numa_balancing.h
+++ b/include/linux/sched/numa_balancing.h
@@ -1,6 +1,46 @@
 #ifndef _LINUX_SCHED_NUMA_BALANCING_H
 #define _LINUX_SCHED_NUMA_BALANCING_H
 
+/*
+ * This is the interface between the scheduler and the MM that
+ * implements memory access pattern based NUMA-balancing:
+ */
+
 #include <linux/sched.h>
 
+#define TNF_MIGRATED	0x01
+#define TNF_NO_GROUP	0x02
+#define TNF_SHARED	0x04
+#define TNF_FAULT_LOCAL	0x08
+#define TNF_MIGRATE_FAIL 0x10
+
+#ifdef CONFIG_NUMA_BALANCING
+extern void task_numa_fault(int last_node, int node, int pages, int flags);
+extern pid_t task_numa_group_id(struct task_struct *p);
+extern void set_numabalancing_state(bool enabled);
+extern void task_numa_free(struct task_struct *p);
+extern bool should_numa_migrate_memory(struct task_struct *p, struct page *page,
+					int src_nid, int dst_cpu);
+#else
+static inline void task_numa_fault(int last_node, int node, int pages,
+				   int flags)
+{
+}
+static inline pid_t task_numa_group_id(struct task_struct *p)
+{
+	return 0;
+}
+static inline void set_numabalancing_state(bool enabled)
+{
+}
+static inline void task_numa_free(struct task_struct *p)
+{
+}
+static inline bool should_numa_migrate_memory(struct task_struct *p,
+				struct page *page, int src_nid, int dst_cpu)
+{
+	return true;
+}
+#endif
+
 #endif /* _LINUX_SCHED_NUMA_BALANCING_H */
-- 
2.7.4