@@ -3744,12 +3744,14 @@ static void raid_io_hints(struct dm_target *ti, struct queue_limits *limits)
blk_limits_io_opt(limits, chunk_size_bytes * mddev_data_stripes(rs));
/*
- * RAID1 and RAID10 personalities require bio splitting,
- * RAID0/4/5/6 don't and process large discard bios properly.
+ * RAID10 personality requires bio splitting,
+ * RAID0/1/4/5/6 don't and process large discard bios properly.
*/
- if (rs_is_raid1(rs) || rs_is_raid10(rs)) {
- limits->discard_granularity = chunk_size_bytes;
- limits->max_discard_sectors = rs->md.chunk_sectors;
+ if (rs_is_raid10(rs)) {
+ limits->discard_granularity = max(chunk_size_bytes,
+ limits->discard_granularity);
+ limits->max_discard_sectors = min_not_zero(rs->md.chunk_sectors,
+ limits->max_discard_sectors);
}
}