diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/memcontrol.h | 12 | ||||
| -rw-r--r-- | include/linux/zswap.h | 7 |
2 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 43b77363ab8e..5de775e6cdd9 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -219,6 +219,12 @@ struct mem_cgroup { #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_ZSWAP) unsigned long zswap_max; + + /* + * Prevent pages from this memcg from being written back from zswap to + * swap, and from being swapped out on zswap store failures. + */ + bool zswap_writeback; #endif unsigned long soft_limit; @@ -1941,6 +1947,7 @@ static inline void count_objcg_event(struct obj_cgroup *objcg, bool obj_cgroup_may_zswap(struct obj_cgroup *objcg); void obj_cgroup_charge_zswap(struct obj_cgroup *objcg, size_t size); void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg, size_t size); +bool mem_cgroup_zswap_writeback_enabled(struct mem_cgroup *memcg); #else static inline bool obj_cgroup_may_zswap(struct obj_cgroup *objcg) { @@ -1954,6 +1961,11 @@ static inline void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg, size_t size) { } +static inline bool mem_cgroup_zswap_writeback_enabled(struct mem_cgroup *memcg) +{ + /* if zswap is disabled, do not block pages going to the swapping device */ + return true; +} #endif #endif /* _LINUX_MEMCONTROL_H */ diff --git a/include/linux/zswap.h b/include/linux/zswap.h index e88572d4c720..0b709f5bc65f 100644 --- a/include/linux/zswap.h +++ b/include/linux/zswap.h @@ -35,6 +35,7 @@ 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 {}; @@ -55,6 +56,12 @@ 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 */ |