1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_VMPRESSURE_H 2 #ifndef __LINUX_VMPRESSURE_H
3 #define __LINUX_VMPRESSURE_H 3 #define __LINUX_VMPRESSURE_H
4 4
5 #include <linux/mutex.h> 5 #include <linux/mutex.h>
6 #include <linux/list.h> 6 #include <linux/list.h>
7 #include <linux/workqueue.h> 7 #include <linux/workqueue.h>
8 #include <linux/gfp.h> 8 #include <linux/gfp.h>
9 #include <linux/types.h> 9 #include <linux/types.h>
10 #include <linux/cgroup.h> 10 #include <linux/cgroup.h>
11 #include <linux/eventfd.h> 11 #include <linux/eventfd.h>
12 12
13 struct vmpressure { 13 struct vmpressure {
14 unsigned long scanned; 14 unsigned long scanned;
15 unsigned long reclaimed; 15 unsigned long reclaimed;
16 16
17 unsigned long tree_scanned; 17 unsigned long tree_scanned;
18 unsigned long tree_reclaimed; 18 unsigned long tree_reclaimed;
19 /* The lock is used to keep the scanne 19 /* The lock is used to keep the scanned/reclaimed above in sync. */
20 spinlock_t sr_lock; 20 spinlock_t sr_lock;
21 21
22 /* The list of vmpressure_event struct 22 /* The list of vmpressure_event structs. */
23 struct list_head events; 23 struct list_head events;
24 /* Have to grab the lock on events tra 24 /* Have to grab the lock on events traversal or modifications. */
25 struct mutex events_lock; 25 struct mutex events_lock;
26 26
27 struct work_struct work; 27 struct work_struct work;
28 }; 28 };
29 29
30 struct mem_cgroup; 30 struct mem_cgroup;
31 31
32 #ifdef CONFIG_MEMCG 32 #ifdef CONFIG_MEMCG
33 extern void vmpressure(gfp_t gfp, struct mem_c 33 extern void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree,
34 unsigned long scanned, 34 unsigned long scanned, unsigned long reclaimed);
35 extern void vmpressure_prio(gfp_t gfp, struct 35 extern void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio);
36 36
37 extern void vmpressure_init(struct vmpressure 37 extern void vmpressure_init(struct vmpressure *vmpr);
38 extern void vmpressure_cleanup(struct vmpressu 38 extern void vmpressure_cleanup(struct vmpressure *vmpr);
39 extern struct vmpressure *memcg_to_vmpressure( 39 extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg);
40 extern struct mem_cgroup *vmpressure_to_memcg( 40 extern struct mem_cgroup *vmpressure_to_memcg(struct vmpressure *vmpr);
41 extern int vmpressure_register_event(struct me 41 extern int vmpressure_register_event(struct mem_cgroup *memcg,
42 struct ev 42 struct eventfd_ctx *eventfd,
43 const cha 43 const char *args);
44 extern void vmpressure_unregister_event(struct 44 extern void vmpressure_unregister_event(struct mem_cgroup *memcg,
45 struct 45 struct eventfd_ctx *eventfd);
46 #else 46 #else
47 static inline void vmpressure(gfp_t gfp, struc 47 static inline void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree,
48 unsigned long sc 48 unsigned long scanned, unsigned long reclaimed) {}
49 static inline void vmpressure_prio(gfp_t gfp, 49 static inline void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg,
50 int prio) { 50 int prio) {}
51 #endif /* CONFIG_MEMCG */ 51 #endif /* CONFIG_MEMCG */
52 #endif /* __LINUX_VMPRESSURE_H */ 52 #endif /* __LINUX_VMPRESSURE_H */
53 53
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