On Thu, 2 Feb 2023 16:55:03 -0800, Eric Biggers wrote:
From: Eric Biggers ebiggers@google.com
When writing a page from an encrypted file that is using filesystem-layer encryption (not inline encryption), ext4 encrypts the pagecache page into a bounce page, then writes the bounce page.
It also passes the bounce page to wbc_account_cgroup_owner(). That's incorrect, because the bounce page is a newly allocated temporary page that doesn't have the memory cgroup of the original pagecache page. This makes wbc_account_cgroup_owner() not account the I/O to the owner of the pagecache page as it should.
[...]
Applied, thanks!
[1/1] ext4: fix cgroup writeback accounting with fs-layer encryption commit: ffec85d53d0f39ee4680a2cf0795255e000e1feb
Best regards,