From: Mikulas Patocka Date: Mon, 15 Sep 2025 14:12:40 +0000 (+0200) Subject: dm-raid: don't set io_min and io_opt for raid1 X-Git-Tag: v6.12.49~66 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=cb58eaad2235bc35be3b84625722c41d0bf88c6a;p=thirdparty%2Fkernel%2Fstable.git dm-raid: don't set io_min and io_opt for raid1 commit a86556264696b797d94238d99d8284d0d34ed960 upstream. These commands modprobe brd rd_size=1048576 vgcreate vg /dev/ram* lvcreate -m4 -L10 -n lv vg trigger the following warnings: device-mapper: table: 252:10: adding target device (start sect 0 len 24576) caused an alignment inconsistency device-mapper: table: 252:10: adding target device (start sect 0 len 24576) caused an alignment inconsistency The warnings are caused by the fact that io_min is 512 and physical block size is 4096. If there's chunk-less raid, such as raid1, io_min shouldn't be set to zero because it would be raised to 512 and it would trigger the warning. Signed-off-by: Mikulas Patocka Reviewed-by: Martin K. Petersen Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index 163a5bbd485f9..c69696d2540ab 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -3811,8 +3811,10 @@ static void raid_io_hints(struct dm_target *ti, struct queue_limits *limits) struct raid_set *rs = ti->private; unsigned int chunk_size_bytes = to_bytes(rs->md.chunk_sectors); - limits->io_min = chunk_size_bytes; - limits->io_opt = chunk_size_bytes * mddev_data_stripes(rs); + if (chunk_size_bytes) { + limits->io_min = chunk_size_bytes; + limits->io_opt = chunk_size_bytes * mddev_data_stripes(rs); + } } static void raid_presuspend(struct dm_target *ti)