This is a note to let you know that I've just added the patch titled
dm-stripe: limit chunk_sectors to the stripe size
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dm-stripe-limit-chunk_sectors-to-the-stripe-size.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
commit f1404ed6434738563ceb9363a9dd6d745b547bd1
Author: John Garry <[email protected]>
Date: Fri Jul 11 10:52:57 2025 +0000
dm-stripe: limit chunk_sectors to the stripe size
[ Upstream commit 5fb9d4341b782a80eefa0dc1664d131ac3c8885d ]
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 <[email protected]>
Reviewed-by: Mikulas Patocka <[email protected]>
Signed-off-by: John Garry <[email protected]>
Reviewed-by: Martin K. Petersen <[email protected]>
Link:
https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>
Stable-dep-of: 1071d560afb4 ("dm-stripe: fix a possible integer overflow")
Signed-off-by: Sasha Levin <[email protected]>
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c
index 67026e1cbc857..aad50e9fe9958 100644
--- a/drivers/md/dm-stripe.c
+++ b/drivers/md/dm-stripe.c
@@ -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;
}
