Commit 5fb9d434 authored by John Garry's avatar John Garry Committed by Jens Axboe
Browse files

dm-stripe: limit chunk_sectors to the stripe size 



Same as done for raid0, set chunk_sectors limit to appropriately set the
atomic write size limit.

Setting chunk_sectors limit in this way overrides the stacked limit
already calculated based on the bottom device limits. This is ok, as
when any bios are sent to the bottom devices, the block layer will still
respect the bottom device chunk_sectors.

Reviewed-by: default avatarNilay Shroff <nilay@linux.ibm.com>
Reviewed-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarJohn Garry <john.g.garry@oracle.com>
Reviewed-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20250711105258.3135198-6-john.g.garry@oracle.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 7ef50c4c

drivers/md/dm-stripe.c

+1 −0
Original line number Diff line number Diff line
@@ -458,6 +458,7 @@ static void stripe_io_hints(struct dm_target *ti, 
	struct stripe_c *sc = ti->private;

	unsigned int chunk_size = sc->chunk_size << SECTOR_SHIFT;



	limits->chunk_sectors = sc->chunk_size;

	limits->io_min = chunk_size;

	limits->io_opt = chunk_size * sc->stripes;

}