blob: 0b709f5bc65fac2477df81ee766305dd2aa33200 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_ZSWAP_H
#define _LINUX_ZSWAP_H
#include <linux/types.h>
#include <linux/mm_types.h>
struct lruvec;
extern u64 zswap_pool_total_size;
extern atomic_t zswap_stored_pages;
#ifdef CONFIG_ZSWAP
struct zswap_lruvec_state {
/*
* Number of pages in zswap that should be protected from the shrinker.
* This number is an estimate of the following counts:
*
* a) Recent page faults.
* b) Recent insertion to the zswap LRU. This includes new zswap stores,
* as well as recent zswap LRU rotations.
*
* These pages are likely to be warm, and might incur IO if the are written
* to swap.
*/
atomic_long_t nr_zswap_protected;
};
bool zswap_store(struct folio *folio);
bool zswap_load(struct folio *folio);
void zswap_invalidate(int type, pgoff_t offset);
void zswap_swapon(int type);
void zswap_swapoff(int type);
void zswap_memcg_offline_cleanup(struct mem_cgroup *memcg);
void zswap_lruvec_state_init(struct lruvec *lruvec);
void zswap_folio_swapin(struct folio *folio);
bool is_zswap_enabled(void);
#else
struct zswap_lruvec_state {};
static inline bool zswap_store(struct folio *folio)
{
return false;
}
static inline bool zswap_load(struct folio *folio)
{
return false;
}
static inline void zswap_invalidate(int type, pgoff_t offset) {}
static inline void zswap_swapon(int type) {}
static inline void zswap_swapoff(int type) {}
static inline void zswap_memcg_offline_cleanup(struct mem_cgroup *memcg) {}
static inline void zswap_lruvec_state_init(struct lruvec *lruvec) {}
static inline void zswap_folio_swapin(struct folio *folio) {}
static inline bool is_zswap_enabled(void)
{
return false;
}
#endif
#endif /* _LINUX_ZSWAP_H */
|
