[PATCH v3 0/2] iomap: flush dirty cache over unwritten mappings on zero range

[Brian Foster <bfoster@redhat.com>]

Hi all,

Here's v3 of the iomap zero range flush fixes. No real changes here
other than comment updates to better explain the flush and stale logic.
The latest version of corresponding test support is posted here [1].
Thoughts, reviews, flames appreciated.

v3:
- Rework comment(s) in patch 2 to explain marking the mapping stale.
- Added R-b tags.
v2: https://lore.kernel.org/linux-fsdevel/20240828181912.41517-1-bfoster@redhat.com/
- Update comment in patch 2 to explain hole case.
v1: https://lore.kernel.org/linux-fsdevel/20240822145910.188974-1-bfoster@redhat.com/
- Alternative approach, flush instead of revalidate.
rfc: https://lore.kernel.org/linux-fsdevel/20240718130212.23905-1-bfoster@redhat.com/

Brian Foster (2):
  iomap: fix handling of dirty folios over unwritten extents
  iomap: make zero range flush conditional on unwritten mappings

 fs/iomap/buffered-io.c | 63 +++++++++++++++++++++++++++++++++++++++---
 fs/xfs/xfs_iops.c      | 10 -------
 2 files changed, 59 insertions(+), 14 deletions(-)

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2.45.0