[v3,00/25] iomap/xfs folio patches

Message

Matthew Wilcox Dec. 16, 2021, 9:06 p.m. UTC

This patchset converts XFS & iomap to use folios, and gets them to a
state where they can handle multi-page folios.  Applying these patches
is not yet sufficient to actually start using multi-page folios for
XFS; more page cache changes are needed.  I don't anticipate needing to
touch XFS again until we're at the point where we want to convert the
aops to be type-safe.  It completes an xfstests run with no unexpected
failures.

I think everything here has been posted before, but I want to get
acks/reviews on patch 15 in particular.  I'll send a pull request
for these patches tomorrow.

v3:
 - Rebased to -rc5, which removes the first four patches from v2.
 - Fixed passing lengths > PAGE_SIZE to iomap_write_begin().
v2:
 - Added review tags from Jens, Darrick & Christoph (thanks!)
 - Added folio_zero_* wrappers around zero_user_*()
 - Added a patch to rename AS_THP_SUPPORT
 - Added a patch to convert __block_write_begin_int() to take a folio
 - Split the iomap_add_to_ioend() patch into three
 - Updated changelog of bio_add_folio() (Jens)
 - Adjusted whitespace of bio patches (Christoph, Jens)
 - Improved changelog of readahead conversion to explain why the put_page()
   disappeared (Christoph)
 - Add a patch to zero an entire folio at a time, instead of limiting to
   a page
 - Switch pos & end_pos back to being u64 from loff_t
 - Call block_write_end() and ->page_done with the head page of the folio,
   as that's what those functions expect.

Matthew Wilcox (Oracle) (25):
  block: Add bio_add_folio()
  block: Add bio_for_each_folio_all()
  fs/buffer: Convert __block_write_begin_int() to take a folio
  iomap: Convert to_iomap_page to take a folio
  iomap: Convert iomap_page_create to take a folio
  iomap: Convert iomap_page_release to take a folio
  iomap: Convert iomap_releasepage to use a folio
  iomap: Add iomap_invalidate_folio
  iomap: Pass the iomap_page into iomap_set_range_uptodate
  iomap: Convert bio completions to use folios
  iomap: Use folio offsets instead of page offsets
  iomap: Convert iomap_read_inline_data to take a folio
  iomap: Convert readahead and readpage to use a folio
  iomap: Convert iomap_page_mkwrite to use a folio
  iomap: Allow iomap_write_begin() to be called with the full length
  iomap: Convert __iomap_zero_iter to use a folio
  iomap: Convert iomap_write_begin() and iomap_write_end() to folios
  iomap: Convert iomap_write_end_inline to take a folio
  iomap,xfs: Convert ->discard_page to ->discard_folio
  iomap: Simplify iomap_writepage_map()
  iomap: Simplify iomap_do_writepage()
  iomap: Convert iomap_add_to_ioend() to take a folio
  iomap: Convert iomap_migrate_page() to use folios
  iomap: Support large folios in invalidatepage
  xfs: Support large folios

 Documentation/core-api/kernel-api.rst |   1 +
 block/bio.c                           |  22 ++
 fs/buffer.c                           |  23 +-
 fs/internal.h                         |   2 +-
 fs/iomap/buffered-io.c                | 518 +++++++++++++-------------
 fs/xfs/xfs_aops.c                     |  24 +-
 fs/xfs/xfs_icache.c                   |   2 +
 include/linux/bio.h                   |  56 ++-
 include/linux/iomap.h                 |   3 +-
 9 files changed, 373 insertions(+), 278 deletions(-)