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Selectable block allocators

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ZFS historically has had several space allocators that were
dynamically selectable.  While these have been retained in 
OpenZFS, only a single allocator has been statically compiled 
in. This patch compiles all allocators for OpenZFS and provides 
a module parameter to allow for manual selection between them.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ameer Hamza <ahamza@ixsystems.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Edmund Nadolski <edmund.nadolski@ixsystems.com>
Closes #15218
This commit is contained in:
ednadolski-ix
2023-09-01 19:00:30 -06:00
committed by GitHub
parent 71472bf375
commit 95f71c019d
9 changed files with 127 additions and 31 deletions
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include/sys/metaslab.h
+1
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@@ -39,6 +39,7 @@ extern "C" {
typedef struct metaslab_ops {
const char *msop_name;
uint64_t (*msop_alloc)(metaslab_t *, uint64_t);
} metaslab_ops_t;
include/sys/spa.h
+3
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@@ -1056,6 +1056,8 @@ extern uint64_t spa_deadman_synctime(spa_t *spa);
extern uint64_t spa_deadman_ziotime(spa_t *spa);
extern uint64_t spa_dirty_data(spa_t *spa);
extern spa_autotrim_t spa_get_autotrim(spa_t *spa);
extern int spa_get_allocator(spa_t *spa);
extern void spa_set_allocator(spa_t *spa, const char *allocator);
/* Miscellaneous support routines */
extern void spa_load_failed(spa_t *spa, const char *fmt, ...)
@@ -1207,6 +1209,7 @@ int param_set_deadman_ziotime(ZFS_MODULE_PARAM_ARGS);
int param_set_deadman_synctime(ZFS_MODULE_PARAM_ARGS);
int param_set_slop_shift(ZFS_MODULE_PARAM_ARGS);
int param_set_deadman_failmode(ZFS_MODULE_PARAM_ARGS);
int param_set_active_allocator(ZFS_MODULE_PARAM_ARGS);
#ifdef ZFS_DEBUG
#define dprintf_bp(bp, fmt, ...) do { \
include/sys/spa_impl.h
+3
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@@ -263,6 +263,7 @@ struct spa {
*/
spa_alloc_t *spa_allocs;
int spa_alloc_count;
int spa_active_allocator; /* selectable allocator */
spa_aux_vdev_t spa_spares; /* hot spares */
spa_aux_vdev_t spa_l2cache; /* L2ARC cache devices */
@@ -467,6 +468,8 @@ extern int param_set_deadman_failmode_common(const char *val);
extern void spa_set_deadman_synctime(hrtime_t ns);
extern void spa_set_deadman_ziotime(hrtime_t ns);
extern const char *spa_history_zone(void);
extern const char *zfs_active_allocator;
extern int param_set_active_allocator_common(const char *val);
#ifdef __cplusplus
}