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Small fix to prefetch ranges aggregation 

When after #16022 adding new range we aggregate more than two
existing ranges, that should be very rare, only if several streams
overlap, we may need to zero not the last range, but some earlier.

Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
This commit is contained in:
Alexander Motin 2024-04-09 11:38:35 -04:00
parent 162cc80b81
commit 21a17675d7
1 changed files with 2 additions and 2 deletions
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4
module/zfs/dmu_zfetch.c
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@ -418,8 +418,8 @@ dmu_zfetch_future(zstream_t *zs, uint64_t blkid, uint64_t nblks)
zs->zs_ranges[f].start = zs->zs_ranges[l].start;
zs->zs_ranges[f].end = zs->zs_ranges[l].end;
}
zs->zs_ranges[ZFETCH_RANGES - 1].start = 0;
zs->zs_ranges[ZFETCH_RANGES - 1].end = 0;
zs->zs_ranges[f].start = 0;
zs->zs_ranges[f].end = 0;
}
} else if (i < ZFETCH_RANGES) {
/* Got no intersecting ranges, insert new one. */