Date: Wed, 1 Oct 2025 07:12:04 GMT From: Mateusz Guzik <mjg@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 4e0997d1d492 - main - zfs: retire zfs_zstd_compress_wrap Message-ID: <202510010712.5917C4Wq040888@gitrepo.freebsd.org>
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The branch main has been updated by mjg: URL: https://cgit.FreeBSD.org/src/commit/?id=4e0997d1d492eb955bb20a970a7fce189269498c commit 4e0997d1d492eb955bb20a970a7fce189269498c Author: Mateusz Guzik <mjg@FreeBSD.org> AuthorDate: 2025-10-01 07:09:10 +0000 Commit: Mateusz Guzik <mjg@FreeBSD.org> CommitDate: 2025-10-01 07:09:10 +0000 zfs: retire zfs_zstd_compress_wrap The function is unused, already disappeared upstream and results in compilation warnings. Sponsored by: Rubicon Communications, LLC ("Netgate") --- sys/contrib/openzfs/module/zstd/zfs_zstd.c | 58 ------------------------------ 1 file changed, 58 deletions(-) diff --git a/sys/contrib/openzfs/module/zstd/zfs_zstd.c b/sys/contrib/openzfs/module/zstd/zfs_zstd.c index 3db196953f74..c403c001086a 100644 --- a/sys/contrib/openzfs/module/zstd/zfs_zstd.c +++ b/sys/contrib/openzfs/module/zstd/zfs_zstd.c @@ -441,64 +441,6 @@ zstd_enum_to_level(enum zio_zstd_levels level, int16_t *zstd_level) } #ifndef IN_LIBSA -static size_t -zfs_zstd_compress_wrap(void *s_start, void *d_start, size_t s_len, size_t d_len, - int level) -{ - int16_t zstd_level; - if (zstd_enum_to_level(level, &zstd_level)) { - ZSTDSTAT_BUMP(zstd_stat_com_inval); - return (s_len); - } - /* - * A zstd early abort heuristic. - * - * - Zeroth, if this is <= zstd-3, or < zstd_abort_size (currently - * 128k), don't try any of this, just go. - * (because experimentally that was a reasonable cutoff for a perf win - * with tiny ratio change) - * - First, we try LZ4 compression, and if it doesn't early abort, we - * jump directly to whatever compression level we intended to try. - * - Second, we try zstd-1 - if that errors out (usually, but not - * exclusively, if it would overflow), we give up early. - * - * If it works, instead we go on and compress anyway. - * - * Why two passes? LZ4 alone gets you a lot of the way, but on highly - * compressible data, it was losing up to 8.5% of the compressed - * savings versus no early abort, and all the zstd-fast levels are - * worse indications on their own than LZ4, and don't improve the LZ4 - * pass noticably if stacked like this. - */ - size_t actual_abort_size = zstd_abort_size; - if (zstd_earlyabort_pass > 0 && zstd_level >= zstd_cutoff_level && - s_len >= actual_abort_size) { - int pass_len = 1; - pass_len = zfs_lz4_compress(s_start, d_start, s_len, d_len, 0); - if (pass_len < d_len) { - ZSTDSTAT_BUMP(zstd_stat_lz4pass_allowed); - goto keep_trying; - } - ZSTDSTAT_BUMP(zstd_stat_lz4pass_rejected); - - pass_len = zfs_zstd_compress(s_start, d_start, s_len, d_len, - ZIO_ZSTD_LEVEL_1); - if (pass_len == s_len || pass_len <= 0 || pass_len > d_len) { - ZSTDSTAT_BUMP(zstd_stat_zstdpass_rejected); - return (s_len); - } - ZSTDSTAT_BUMP(zstd_stat_zstdpass_allowed); - } else { - ZSTDSTAT_BUMP(zstd_stat_passignored); - if (s_len < actual_abort_size) { - ZSTDSTAT_BUMP(zstd_stat_passignored_size); - } - } -keep_trying: - return (zfs_zstd_compress(s_start, d_start, s_len, d_len, level)); - -} - /* Compress block using zstd */ static size_t zfs_zstd_compress_impl(void *s_start, void *d_start, size_t s_len, size_t d_len,
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