linux-kernel - [PATCH v3 00/11] Performance fixes for 9p filesystem

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Date:   Tue, 24 Jan 2023 02:38:23 +0000
From:   Eric Van Hensbergen <ericvh@...nel.org>
To:     v9fs-developer@...ts.sourceforge.net, asmadeus@...ewreck.org,
        rminnich@...il.com, lucho@...kov.net
Cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux_oss@...debyte.com, Eric Van Hensbergen <ericvh@...nel.org>
Subject: [PATCH v3 00/11] Performance fixes for 9p filesystem

This is the third version of a patch series which adds a number
of features to improve read/write performance in the 9p filesystem.
Mostly it focuses on fixing caching to help utilize the recently
increased MSIZE limits and also fixes some problematic behavior
within the writeback code.

All together, these show roughly 10x speed increases on simple
file transfers.  Future patch sets will improve cache consistency
and directory caching.

These patches are also available on github:
https://github.com/v9fs/linux/tree/ericvh/for-next
and on kernel.org:
https://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs.git

Tested against qemu, cpu, and diod with fsx, dbench, and some
simple benchmarks.

Eric Van Hensbergen (11):
  Adjust maximum MSIZE to account for p9 header
  Expand setup of writeback cache to all levels
  Consolidate file operations and add readahead and writeback
  Remove unnecessary superblock flags
  allow disable of xattr support on mount
  fix bug in client create for .L
  Add additional debug flags and open modes
  Add new mount modes
  fix error reporting in v9fs_dir_release
  writeback mode fixes
  Fix revalidate

 Documentation/filesystems/9p.rst |  26 +++--
 fs/9p/fid.c                      |  52 ++++-----
 fs/9p/fid.h                      |  33 +++++-
 fs/9p/v9fs.c                     |  49 +++++---
 fs/9p/v9fs.h                     |   9 +-
 fs/9p/v9fs_vfs.h                 |   4 -
 fs/9p/vfs_addr.c                 |  24 ++--
 fs/9p/vfs_dentry.c               |   3 +-
 fs/9p/vfs_dir.c                  |  16 ++-
 fs/9p/vfs_file.c                 | 194 +++++++------------------------
 fs/9p/vfs_inode.c                |  71 ++++-------
 fs/9p/vfs_inode_dotl.c           |  62 +++++-----
 fs/9p/vfs_super.c                |  28 +++--
 include/net/9p/9p.h              |   5 +
 net/9p/client.c                  |   8 +-
 15 files changed, 256 insertions(+), 328 deletions(-)

-- 
2.37.2