Small fix to prefetch ranges aggregation

When after openzfs#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. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Alexander Motin <[email protected]> Sponsored by: iXsystems, Inc. Closes openzfs#16072
gamanakis · Apr 19, 2024 · f4ce02a · f4ce02a
1 parent 97d7228
commit f4ce02a
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/module/zfs/dmu_zfetch.c b/module/zfs/dmu_zfetch.c
@@ -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. */