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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/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
}