1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_SCHED_NUMA_BALANCING_H
3#define _LINUX_SCHED_NUMA_BALANCING_H
4
5/*
6 * This is the interface between the scheduler and the MM that
7 * implements memory access pattern based NUMA-balancing:
8 */
9
10#include <linux/sched.h>
11
12#define TNF_MIGRATED 0x01
13#define TNF_NO_GROUP 0x02
14#define TNF_SHARED 0x04
15#define TNF_FAULT_LOCAL 0x08
16#define TNF_MIGRATE_FAIL 0x10
17
18enum numa_vmaskip_reason {
19 NUMAB_SKIP_UNSUITABLE,
20 NUMAB_SKIP_SHARED_RO,
21 NUMAB_SKIP_INACCESSIBLE,
22 NUMAB_SKIP_SCAN_DELAY,
23 NUMAB_SKIP_PID_INACTIVE,
24 NUMAB_SKIP_IGNORE_PID,
25 NUMAB_SKIP_SEQ_COMPLETED,
26};
27
28#ifdef CONFIG_NUMA_BALANCING
29extern void task_numa_fault(int last_node, int node, int pages, int flags);
30extern pid_t task_numa_group_id(struct task_struct *p);
31extern void set_numabalancing_state(bool enabled);
32extern void task_numa_free(struct task_struct *p, bool final);
33bool should_numa_migrate_memory(struct task_struct *p, struct folio *folio,
34 int src_nid, int dst_cpu);
35#else
36static inline void task_numa_fault(int last_node, int node, int pages,
37 int flags)
38{
39}
40static inline pid_t task_numa_group_id(struct task_struct *p)
41{
42 return 0;
43}
44static inline void set_numabalancing_state(bool enabled)
45{
46}
47static inline void task_numa_free(struct task_struct *p, bool final)
48{
49}
50static inline bool should_numa_migrate_memory(struct task_struct *p,
51 struct folio *folio, int src_nid, int dst_cpu)
52{
53 return true;
54}
55#endif
56
57#endif /* _LINUX_SCHED_NUMA_BALANCING_H */
58