On Wed, Jan 13, 2021 at 05:29:58PM +0100, Jan Kara wrote:

Hello!

On Tue 12-01-21 11:02:42, Eric Biggers wrote:

quoted

Patch 1 fixes a bug in how __writeback_single_inode() handles lazytime
expirations.  I originally reported this last year
(https://lore.kernel.org/r/20200306004555.GB225345@gmail.com (local)) because it
causes the FS_IOC_REMOVE_ENCRYPTION_KEY ioctl to not work properly, as
the bug causes inodes to remain dirty after a sync.

It also turns out that lazytime on XFS is partially broken because it
doesn't actually write timestamps to disk after a sync() or after
dirtytime_expire_interval.  This is fixed by the same fix.

This supersedes previously proposed fixes, including
https://lore.kernel.org/r/20200307020043.60118-1-tytso@mit.edu (local) and
https://lore.kernel.org/r/20200325122825.1086872-3-hch@lst.de (local) from last
year (which had some issues and didn't fix the XFS bug), and v1 of this
patchset which took a different approach
(https://lore.kernel.org/r/20210105005452.92521-1-ebiggers@kernel.org (local)).

Patches 2-11 then clean up various things related to lazytime and
writeback, such as clarifying the semantics of ->dirty_inode() and the
inode dirty flags, and improving comments.

This patchset applies to v5.11-rc2.

Thanks for the patches. I've picked the patches to my tree. I plan to push
patch 1/11 to Linus later this week, the rest of the cleanups will go to
him during the next merge window.

								Honza

Sounds good, thanks!

- Eric