[v2,00/11] fuse: convert to using folios and iomap

Message

Josef Bacik Aug. 28, 2024, 9:13 p.m. UTC

v1: https://lore.kernel.org/linux-fsdevel/[e-mail]/

v1->v2:
- Fixed my fstests setup to use --nopassthrough so my code actually got tested
  this time.
- Fixed a bug where we double put on the folio in readpages, because previous
  behavior was the reference was maintained until the endio, but
  readahead_folio() drops the reference on the folio, so we need to not call put
  in the endio anymore.
- Fixed the IS_ERR inversion pointed out by Joanne.
- Made the various adjustments pointed out by Willy.
- Updated the Kconfig per hch's suggestion.
- Pushed to my GH tree since there are dependencies to make it easier to see
  what the code is https://github.com/josefbacik/linux/tree/fuse-iomap

--- Original email ---
Hello,

This is a prep series for my work to enable large folios on fuse.  It has two
dependencies, one is Joanne's writeback clean patches

https://lore.kernel.org/linux-fsdevel/[e-mail]/

and an iomap patch to allow us to pass the file through the buffered write path

https://lore.kernel.org/linux-fsdevel/[e-mail]/

I've run these through an fstests run with passthrough_hp --direct-io,
everything looks good.

The last remaining bit that needs to be made to use folios is the splice/pipe
code, which I need to be a lot more careful about.  The next step is to plumb
through the ability to handle large folios.  But this is a decent start and
removes the bulk of FUSE's use of struct page, and is relatively safe and
straightforward.  Thanks,

Josef

Josef Bacik (11):
  fuse: convert readahead to use folios
  fuse: convert fuse_send_write_pages to use folios
  fuse: convert fuse_fill_write_pages to use folios
  fuse: convert fuse_page_mkwrite to use folios
  fuse: use kiocb_modified in buffered write path
  fuse: use iomap for writeback cache buffered writes
  fuse: convert fuse_do_readpage to use folios
  fuse: convert fuse_writepage_need_send to take a folio
  fuse: use the folio based vmstat helpers
  fuse: convert fuse_retrieve to use folios
  fuse: convert fuse_notify_store to use folios

 fs/fuse/Kconfig |   2 +
 fs/fuse/dev.c   |  38 +++---
 fs/fuse/file.c  | 315 ++++++++++++++++++++++++------------------------
 3 files changed, 183 insertions(+), 172 deletions(-)