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Add ddt, ddt_entry, and l2arc_hdr caches

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Back the allocations for ddt tables+entries and l2arc headers with
kmem caches.  This will reduce the cost of allocating these commonly
used structures and allow for greater visibility of them through the
/proc/spl/kmem/slab interface.

Signed-off-by: John Layman <jlayman@sagecloud.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #1893
This commit is contained in:
John Layman
2013-11-19 16:34:46 -05:00
committed by Brian Behlendorf
parent 4dad7d91e2
commit ecf3d9b8e6
4 changed files with 42 additions and 16 deletions
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include/sys/ddt.h
+2
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@@ -216,6 +216,8 @@ extern void ddt_decompress(uchar_t *src, void *dst, size_t s_len, size_t d_len);
extern ddt_t *ddt_select(spa_t *spa, const blkptr_t *bp);
extern void ddt_enter(ddt_t *ddt);
extern void ddt_exit(ddt_t *ddt);
extern void ddt_init(void);
extern void ddt_fini(void);
extern ddt_entry_t *ddt_lookup(ddt_t *ddt, const blkptr_t *bp, boolean_t add);
extern void ddt_prefetch(spa_t *spa, const blkptr_t *bp);
extern void ddt_remove(ddt_t *ddt, ddt_entry_t *dde);