[PATCH 21/53] sched/headers: Move the NUMA balancing interfaces from to

Ingo Molnar
2017-02-08T18:52:17Z

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@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.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