diff options
| author | Matthew Macy <[email protected]> | 2019-10-18 10:23:19 -0700 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2019-10-18 13:23:19 -0400 |
| commit | c9c9c1e213c15c0f0b94aebcea6b2268d7e8f52b (patch) | |
| tree | 54563ddcec8e84ac933fd396e6f3f701db8a533d /include | |
| parent | 4313a5b4c51e2093f1b45ef9845fc77d32b09330 (diff) | |
OpenZFS restructuring - ARC memory pressure
Factor Linux specific memory pressure handling out of ARC. Each
platform will have different available interfaces for managing memory
pressure.
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Jorgen Lundman <[email protected]>
Reviewed-by: Ryan Moeller <[email protected]>
Signed-off-by: Matt Macy <[email protected]>
Closes #9472
Diffstat (limited to 'include')
| -rw-r--r-- | include/sys/arc_impl.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/include/sys/arc_impl.h b/include/sys/arc_impl.h index 4c4ee40c8..28d430f04 100644 --- a/include/sys/arc_impl.h +++ b/include/sys/arc_impl.h @@ -30,6 +30,8 @@ #include <sys/arc.h> #include <sys/zio_crypt.h> +#include <sys/zthr.h> +#include <sys/aggsum.h> #ifdef __cplusplus extern "C" { @@ -554,6 +556,62 @@ typedef struct arc_stats { kstat_named_t arcstat_raw_size; } arc_stats_t; +typedef enum free_memory_reason_t { + FMR_UNKNOWN, + FMR_NEEDFREE, + FMR_LOTSFREE, + FMR_SWAPFS_MINFREE, + FMR_PAGES_PP_MAXIMUM, + FMR_HEAP_ARENA, + FMR_ZIO_ARENA, +} free_memory_reason_t; + +#define ARCSTAT(stat) (arc_stats.stat.value.ui64) + +#define ARCSTAT_INCR(stat, val) \ + atomic_add_64(&arc_stats.stat.value.ui64, (val)) + +#define ARCSTAT_BUMP(stat) ARCSTAT_INCR(stat, 1) +#define ARCSTAT_BUMPDOWN(stat) ARCSTAT_INCR(stat, -1) + +#define arc_no_grow ARCSTAT(arcstat_no_grow) /* do not grow cache size */ +#define arc_p ARCSTAT(arcstat_p) /* target size of MRU */ +#define arc_c ARCSTAT(arcstat_c) /* target size of cache */ +#define arc_c_min ARCSTAT(arcstat_c_min) /* min target cache size */ +#define arc_c_max ARCSTAT(arcstat_c_max) /* max target cache size */ +#define arc_sys_free ARCSTAT(arcstat_sys_free) /* target system free bytes */ +#define arc_need_free ARCSTAT(arcstat_need_free) /* bytes to be freed */ + +extern int arc_zio_arena_free_shift; +extern taskq_t *arc_prune_taskq; +extern arc_stats_t arc_stats; +extern hrtime_t arc_growtime; +extern boolean_t arc_warm; +extern int arc_grow_retry; +extern int arc_shrink_shift; +extern zthr_t *arc_adjust_zthr; +extern kmutex_t arc_adjust_lock; +extern kcondvar_t arc_adjust_waiters_cv; +extern boolean_t arc_adjust_needed; +extern kmutex_t arc_prune_mtx; +extern list_t arc_prune_list; +extern aggsum_t arc_size; +extern arc_state_t *arc_mfu; +extern arc_state_t *arc_mru; +extern uint_t zfs_arc_pc_percent; +extern int arc_lotsfree_percent; + +extern void arc_reduce_target_size(int64_t to_free); +extern boolean_t arc_reclaim_needed(void); +extern void arc_kmem_reap_soon(void); + +extern void arc_lowmem_init(void); +extern void arc_lowmem_fini(void); +extern void arc_prune_async(int64_t); +extern int arc_memory_throttle(spa_t *spa, uint64_t reserve, uint64_t txg); +extern uint64_t arc_free_memory(void); +extern int64_t arc_available_memory(void); + #ifdef __cplusplus } #endif |