linux-ext4 - [PATCH 0/3] Start moving write_begin/write

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Date: Tue, 30 Jan 2024 05:54:10 +0000
From: "Matthew Wilcox (Oracle)" <willy@...radead.org>
To: Christoph Hellwig <hch@....de>
Cc: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
	linux-fsdevel@...r.kernel.org,
	linux-ext4@...r.kernel.org
Subject: [PATCH 0/3] Start moving write_begin/write_end out of aops

Christoph wants to remove write_begin/write_end from aops and pass them
to filemap as callback functions.  Hre's one possible route to do this.
I combined it with the folio conversion (because why touch the same code
twice?) and tweaked some of the other things (support for ridiculously
large folios with size_t lengths, remove the need to initialise fsdata
by passing only a pointer to the fsdata pointer).  And then I converted
ext4, which is probably the worst filesystem to convert because it needs
three different bwops.  Most fs will only need one.

Not written yet: convert all the other fs, remove wrappers.

Matthew Wilcox (Oracle) (3):
  fs: Introduce buffered_write_operations
  fs: Supply optional buffered_write_operations in buffer.c
  ext4: Convert to buffered_write_operations

 fs/buffer.c                 | 62 +++++++++++++++++++++++--------
 fs/ext4/ext4.h              |  8 +++-
 fs/ext4/file.c              | 10 ++++-
 fs/ext4/inline.c            | 15 +++-----
 fs/ext4/inode.c             | 73 +++++++++++++++++++------------------
 fs/jfs/file.c               |  3 +-
 fs/ramfs/file-mmu.c         |  3 +-
 fs/ufs/file.c               |  2 +-
 include/linux/buffer_head.h | 22 +++++++++--
 include/linux/fs.h          |  3 --
 include/linux/pagemap.h     | 22 +++++++++++
 mm/filemap.c                | 70 +++++++++++++++++++++++------------
 12 files changed, 193 insertions(+), 100 deletions(-)

-- 
2.43.0