[PATCH 00/10] gfs2 iomap buffered write support

[Andreas Gruenbacher <agruenba@redhat.com>]

Hello,

this patch queue converts gfs2 to use iomap for buffered writes, which
uses multi-page block allocations for large writes instead of requiring
a separate allocation for each page of data.

The patches apply on top of the gfs2 punch-hole patch queue [*].

So far, the only user of iomap_file_buffered_write was xfs, which
doesn't do data journaling.  To support gfs2's data journaling, patch
08/10 adds a new iomap_written iomap operation: if defined, this
operation is called by iomap_file_buffered_write whenever a page has
been written to.

This patch queue doesn't convert direct I/O, so we still have a
remaining user of the old gfs2_write_begin / gfs2_write_end interface
left.  Once direct I/O has been converted to use iomap, we'll get rid of
that code, though.

Thanks,
Andreas

[*] https://www.redhat.com/archives/cluster-devel/2017-December/msg00089.html

Andreas Gruenbacher (10):
  gfs2: Typo fixes
  gfs2: Add gfs2_max_stuffed_size
  gfs2: Minor gfs2_page_add_databufs cleanup
  gfs2: gfs2_stuffed_write_end cleanup
  gfs2: gfs2_stuffed_write_end cleanup (fixup)
  gfs2: Remove ordered write mode handling from gfs2_trans_add_data
  gfs2: Iomap cleanups and improvements
  iomap: New iomap_written operation
  gfs2: Implement iomap buffered write support (1)
  gfs2: Implement iomap buffered write support (2)

 fs/gfs2/aops.c        | 178 ++++++++++++++++------
 fs/gfs2/aops.h        |  19 +++
 fs/gfs2/bmap.c        | 407 +++++++++++++++++++++++++++++++++++++-------------
 fs/gfs2/bmap.h        |   5 +-
 fs/gfs2/dir.c         |   3 +-
 fs/gfs2/file.c        |  49 +++++-
 fs/gfs2/incore.h      |   5 +
 fs/gfs2/inode.c       |  10 +-
 fs/gfs2/log.h         |   7 +-
 fs/gfs2/quota.c       |   5 +-
 fs/gfs2/trans.c       |  27 +---
 fs/iomap.c            |  21 ++-
 include/linux/iomap.h |   9 ++
 13 files changed, 558 insertions(+), 187 deletions(-)
 create mode 100644 fs/gfs2/aops.h

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2.14.3