dm crypt: allocate compound pages if possible

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It was reported that allocating pages for the write buffer in dm-crypt
causes measurable overhead [1].

Change dm-crypt to allocate compound pages if they are available. If
not, fall back to the mempool.

[1] https://listman.redhat.com/archives/dm-devel/2023-February/053284.html

Suggested-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>

...

This commit is contained in:

Mikulas Patocka 2023-05-01 09:19:17 -04:00 • committed by Mike Snitzer

parent 245165658e

commit 5054e778fc

1 changed files with 35 additions and 14 deletions

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49

drivers/md/dm-crypt.c

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