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| author | Eric Biggers <ebiggers@google.com> | 2023-02-03 01:55:03 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2023-03-08 02:12:30 +0100 |
| commit | ffec85d53d0f39ee4680a2cf0795255e000e1feb (patch) | |
| tree | e4a79d37b1e49b1f016f71de05553a08213bd5c5 /fs/afs/dynroot.c | |
| parent | ext4: fix incorrect options show of original mount_opt and extend mount_opt2 (diff) | |
| download | linux-ffec85d53d0f39ee4680a2cf0795255e000e1feb.tar.xz linux-ffec85d53d0f39ee4680a2cf0795255e000e1feb.zip | |
ext4: fix cgroup writeback accounting with fs-layer encryption
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.
Fix this by always passing the pagecache page to
wbc_account_cgroup_owner().
Fixes: 001e4a8775f6 ("ext4: implement cgroup writeback support")
Cc: stable@vger.kernel.org
Reported-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230203005503.141557-1-ebiggers@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/afs/dynroot.c')
0 files changed, 0 insertions, 0 deletions