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SubjectRe: [RFC v4+ hot_track 00/19] vfs: hot data tracking
From
On Mon, Oct 29, 2012 at 12:30 PM,  <zwu.kernel@gmail.com> wrote:
> From: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
>
> 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 can review them via
> https://github.com/wuzhy/kernel/commits/hot_tracking
hi, guys,

The latest code change has been pushed into my above dev git tree. If
no further comments are done, i will post next version soon.

>
> For more info, please check hot_tracking.txt in Documentation
>
> TODO List:
>
> 1.) Need to do scalability or performance tests.
> 2.) Need one simpler but effective temp calc'ing function
> 3.) How to save the file temperature among the umount to be able to
> preserve the file tempreture after reboot
>
> Ben Chociej, Matt Lupfer and Conor Scott originally wrote this code to
> be very btrfs-specific. I've taken their code and attempted to
> make it more generic and integrate it at the VFS level.
>
> Changelog from v3:
> 1.) Rewritten debugfs support based seq_file operation. [Dave Chinner]
> 2.) Refactored workqueue support. [Dave Chinner]
> 3.) Turn some Micro into be tunable [Zhiyong, Zheng Liu]
> TIME_TO_KICK, and HEAT_UPDATE_DELAY
> 4.) Introduce hot func registering framework [Zhiyong]
> 5.) Remove global variable for hot tracking [Zhiyong]
> 6.) Add xfs hot tracking support [Dave Chinner]
> 7.) Add ext4 hot tracking support [Zheng Liu]
> 8.) Cleanedup a lot of other issues [Dave Chinner]
>
> v3:
> 1.) Converted to Radix trees, not RB-tree [Zhiyong, Dave Chinner]
> 2.) Added memory shrinker [Dave Chinner]
>
> v2:
> 1.) Converted to one workqueue to update map info periodically [Dave Chinner]
> 2.) Cleanedup a lot of other issues [Dave Chinner]
>
> v1:
> 1.) Reduce new files and put all in fs/hot_tracking.[ch] [Dave Chinner]
> 2.) Add btrfs hot tracking support [Zhiyong]
> 3.) 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 (17):
> vfs: introduce private radix tree structures
> vfs: initialize and free data structures
> vfs: add I/O frequency update function
> vfs: add two map 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: introduce hot func register framework
> vfs: register one shrinker
> vfs: add one ioctl interface
> debugfs: introduce one function
> vfs: add debugfs support
> sysfs: add two hot_track proc files
> btrfs: add hot tracking support
> vfs: add documentation
>
> Documentation/filesystems/00-INDEX | 2 +
> Documentation/filesystems/hot_tracking.txt | 262 ++++++
> fs/Makefile | 2 +-
> fs/btrfs/ctree.h | 1 +
> fs/btrfs/super.c | 22 +-
> fs/compat_ioctl.c | 5 +
> fs/dcache.c | 2 +
> fs/debugfs/inode.c | 26 +
> fs/direct-io.c | 6 +
> fs/ext4/ext4.h | 3 +
> fs/ext4/super.c | 13 +-
> fs/hot_tracking.c | 1367 ++++++++++++++++++++++++++++
> fs/hot_tracking.h | 58 ++
> fs/ioctl.c | 78 ++
> fs/xfs/xfs_mount.h | 1 +
> fs/xfs/xfs_super.c | 16 +
> include/linux/debugfs.h | 9 +
> include/linux/fs.h | 4 +
> include/linux/hot_tracking.h | 149 +++
> kernel/sysctl.c | 14 +
> mm/filemap.c | 6 +
> mm/page-writeback.c | 12 +
> mm/readahead.c | 6 +
> 23 files changed, 2061 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
>
> --
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--
Regards,

Zhi Yong Wu


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