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Add BRT support to zpool prefetch command

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Implement BRT (Block Reference Table) prefetch functionality similar
to existing DDT prefetch.  This allows preloading BRT metadata into
ARC to improve performance for block cloning operations and frees
of earlier cloned blocks.

Make -t parameter optional.  When omitted, prefetch all supported
metadata types (both DDT and BRT now).

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <alexander.motin@TrueNAS.com>
Closes #17890
This commit is contained in:
Alexander Motin
2025-11-10 19:16:22 -05:00
committed by Brian Behlendorf
parent 002bc3da6a
commit 41878d57ea
12 changed files with 198 additions and 42 deletions
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include/sys/brt.h
+1
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@@ -56,6 +56,7 @@ extern void brt_create(spa_t *spa);
extern int brt_load(spa_t *spa);
extern void brt_unload(spa_t *spa);
extern void brt_sync(spa_t *spa, uint64_t txg);
extern void brt_prefetch_all(spa_t *spa);
#ifdef __cplusplus
}
include/sys/fs/zfs.h
+2 -1
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@@ -1713,7 +1713,8 @@ typedef enum {
typedef enum {
ZPOOL_PREFETCH_NONE = 0,
ZPOOL_PREFETCH_DDT
ZPOOL_PREFETCH_DDT,
ZPOOL_PREFETCH_BRT
} zpool_prefetch_type_t;
typedef enum {