[PATCH v1 hot_track 00/18] vfs: hot data tracking

[zwu.kernel@gmail.com]

From: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>

HI, guys,

  Any comments or ideas are appreciated, thanks.

NOTE:

  The patchset can be obtained via my kernel dev git on github:
git@github.com:wuzhy/kernel.git hot_tracking
  If you're interested, you can also review them via
https://github.com/wuzhy/kernel/commits/hot_tracking

  For more info, please check hot_tracking.txt in Documentation

TODO List:

 1.) Need to do scalability or performance tests. - Required
 2.) Need one simpler but efficient temp calculation function
 3.) How to save the file temperature among the umount to be able to
     preserve the file tempreture after reboot - Optional

Changelog:

 - Embed struct hot_type in struct file_system_type [Darrick J. Wong]
 - Cleanup Some issues [David Sterba]
 - Use a static hot debugfs root [Greg KH]
 - Rewritten debugfs support based on seq_file operation. [Dave Chinner]
 - Refactored workqueue support. [Dave Chinner]
 - Turn some Micro into be tunable   [Zhiyong, Zheng Liu]
       TIME_TO_KICK, and HEAT_UPDATE_DELAY
 - Introduce hot func registering framework [Zhiyong]
 - Remove global variable for hot tracking [Zhiyong]
 - Add xfs hot tracking support [Dave Chinner]
 - Add ext4 hot tracking support [Zheng Liu]
 - Cleanedup a lot of other issues [Dave Chinner]
 - Converted to Radix trees, not RB-tree [Zhiyong, Dave Chinner]
 - Added memory shrinker [Dave Chinner]
 - Converted to one workqueue to update map info periodically [Dave Chinner]
 - Cleanedup a lot of other issues [Dave Chinner]
 - Reduce new files and put all in fs/hot_tracking.[ch] [Dave Chinner]
 - Add btrfs hot tracking support [Zhiyong]
 - The first three patches can probably just be flattened into one.
                                        [Marco Stornelli , Dave Chinner]

Dave Chinner (1):
  xfs: add hot tracking support

Zheng Liu (1):
  ext4: add hot tracking support

Zhi Yong Wu (16):
  vfs: introduce some data structures
  vfs: add init and cleanup functions
  vfs: add I/O frequency update function
  vfs: add two map info arrays
  vfs: add hooks to enable hot tracking
  vfs: add temp calculation function
  vfs: add map info update function
  vfs: add aging function
  vfs: add one work queue
  vfs: add FS hot type support
  vfs: register one shrinker
  vfs: add one ioctl interface
  vfs: add debugfs support
  procfs: add two hot_track proc files
  btrfs: add hot tracking support
  vfs: add documentation

 Documentation/filesystems/00-INDEX         |    2 +
 Documentation/filesystems/hot_tracking.txt |  263 ++++++
 fs/Makefile                                |    2 +-
 fs/btrfs/ctree.h                           |    1 +
 fs/btrfs/super.c                           |   22 +-
 fs/compat_ioctl.c                          |    5 +
 fs/dcache.c                                |    2 +
 fs/direct-io.c                             |    6 +
 fs/ext4/ext4.h                             |    3 +
 fs/ext4/super.c                            |   13 +-
 fs/hot_tracking.c                          | 1321 ++++++++++++++++++++++++++++
 fs/hot_tracking.h                          |   53 ++
 fs/ioctl.c                                 |   74 ++
 fs/xfs/xfs_mount.h                         |    1 +
 fs/xfs/xfs_super.c                         |   16 +
 include/linux/fs.h                         |    5 +
 include/linux/hot_tracking.h               |  146 +++
 kernel/sysctl.c                            |   14 +
 mm/filemap.c                               |    6 +
 mm/page-writeback.c                        |   12 +
 mm/readahead.c                             |    7 +
 21 files changed, 1971 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/filesystems/hot_tracking.txt
 create mode 100644 fs/hot_tracking.c
 create mode 100644 fs/hot_tracking.h
 create mode 100644 include/linux/hot_tracking.h

-- 
1.7.6.5