From ca4a4e9a55beeb138bb06e3867f5e486da896d44 Mon Sep 17 00:00:00 2001
From: Mike Snitzer <snitzer@redhat.com>
Date: Fri, 30 Apr 2021 14:38:37 -0400
Subject: [PATCH] dm raid: remove unnecessary discard limits for raid0 and
raid10
Git-commit: ca4a4e9a55beeb138bb06e3867f5e486da896d44
Patch-mainline: v5.13-rc1
References: bsc#1192320
Commit 29efc390b946 ("md/md0: optimize raid0 discard handling") and
commit d30588b2731f ("md/raid10: improve raid10 discard request")
remove MD raid0's and raid10's inability to properly handle large
discards. So eliminate associated constraints from dm-raid's support.
Depends-on: 29efc390b946 ("md/md0: optimize raid0 discard handling")
Depends-on: d30588b2731f ("md/raid10: improve raid10 discard request")
Reported-by: Matthew Ruffell <matthew.ruffell@canonical.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Coly Li <colyli@suse.de>
---
drivers/md/dm-raid.c | 9 ---------
1 file changed, 9 deletions(-)
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 67372e1a167d..bf4a467fc73a 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -3750,15 +3750,6 @@ static void raid_io_hints(struct dm_target *ti, struct queue_limits *limits)
blk_limits_io_min(limits, chunk_size_bytes);
blk_limits_io_opt(limits, chunk_size_bytes * mddev_data_stripes(rs));
-
- /*
- * RAID0 and RAID10 personalities require bio splitting,
- * RAID1/4/5/6 don't and process large discard bios properly.
- */
- if (rs_is_raid0(rs) || rs_is_raid10(rs)) {
- limits->discard_granularity = chunk_size_bytes;
- limits->max_discard_sectors = rs->md.chunk_sectors;
- }
}
static void raid_postsuspend(struct dm_target *ti)
--
2.31.1