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dm-stripe: limit chunk_sectors to the stripe size

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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: Nilay Shroff <nilay@linux.ibm.com>
Reviewed-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20250711105258.3135198-6-john.g.garry@oracle.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
John Garry 2025-07-11 10:52:57 +00:00 committed by Jens Axboe
parent 7ef50c4c6a
commit 5fb9d4341b
1 changed files with 1 additions and 0 deletions
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1
drivers/md/dm-stripe.c
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@ -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;
}