This is a note to let you know that I've just added the patch titled
dm-crypt: start allocating with MAX_ORDER
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-crypt-start-allocating-with-max_order.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 <stable@xxxxxxxxxxxxxxx> know about it.
commit 622358e7f48feee3351300a2af4163f1258fcc7b
Author: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Date: Fri Nov 17 18:38:33 2023 +0100
dm-crypt: start allocating with MAX_ORDER
[ Upstream commit 13648e04a9b831b3dfa5cf3887dfa6cf8fe5fe69 ]
Commit 23baf831a32c ("mm, treewide: redefine MAX_ORDER sanely")
changed the meaning of MAX_ORDER from exclusive to inclusive. So, we
can allocate compound pages with up to 1 << MAX_ORDER pages.
Reflect this change in dm-crypt and start trying to allocate compound
pages with MAX_ORDER.
Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index cef9353370b20..17ffbf7fbe73e 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1679,7 +1679,7 @@ static struct bio *crypt_alloc_buffer(struct dm_crypt_io *io, unsigned int size)
unsigned int nr_iovecs = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
gfp_t gfp_mask = GFP_NOWAIT | __GFP_HIGHMEM;
unsigned int remaining_size;
- unsigned int order = MAX_ORDER - 1;
+ unsigned int order = MAX_ORDER;
retry:
if (unlikely(gfp_mask & __GFP_DIRECT_RECLAIM))
