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Skip memory allocation when compressing holes

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Hole detection in the zio compression code allows us to
opportunistically skip compression on holes. We can go a step further
by not doing memory allocations on holes either.

Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Richard Yao <richard.yao@klarasystems.com>
Sponsored-by: Wasabi Technology, Inc.
Closes #14500
This commit is contained in:
Richard Yao
2023-02-27 17:41:02 -05:00
committed by GitHub
parent f58e513f74
commit bff26b0220
5 changed files with 23 additions and 16 deletions
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include/sys/zio_compress.h
+1 -1
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@@ -183,7 +183,7 @@ extern int lz4_decompress_zfs(void *src, void *dst, size_t s_len, size_t d_len,
/*
* Compress and decompress data if necessary.
*/
extern size_t zio_compress_data(enum zio_compress c, abd_t *src, void *dst,
extern size_t zio_compress_data(enum zio_compress c, abd_t *src, void **dst,
size_t s_len, uint8_t level);
extern int zio_decompress_data(enum zio_compress c, abd_t *src, void *dst,
size_t s_len, size_t d_len, uint8_t *level);