From: Zhi Yong Wu <wuzhy@xxxxxxxxxxxxxxxxxx> NOTE: The patchset can be obtained via my kernel dev git on github: git@xxxxxxxxxx:wuzhy/kernel.git hot_tracking If you're interested, you can also can review them via https://github.com/wuzhy/kernel/commits/hot_tracking For more infomation, please check hot_tracking.txt in Documentation TODO List: 1.) Need to do scalability or performance tests. 2.) 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, Liu Zheng] TIME_TO_KICK, and HEAT_UPDATE_DELAY 4.) Cleanedup a lot of other issues [Dave Chinner] v2: 1.) Converted to Radix trees, not RB-tree [Zhiyong, Dave Chinner] 2.) Added memory shrinker [Dave Chinner] 3.) Converted to one workqueue to update map info periodically [Dave Chinner] 4.) Cleanedup a lot of other issues [Dave Chinner] v1: 1.) Reduce new files and put all in fs/hot_tracking.[ch] [Dave Chinner] 2.) The first three patches can probably just be flattened into one. [Marco Stornelli , Dave Chinner] Dave Chinner (1): xfs: add hot tracking support Zhi Yong Wu (14): vfs,hot_track: introduce private radix tree structures vfs,hot_track: initialize and free key data structures vfs,hot_track: add the function for collecting I/O frequency vfs,hot_track: add two map arrays vfs,hot_track: add hooks to enable hot data tracking vfs,hot_track: add the function for updating map arrays vfs,hot_track: add the aging function vfs,hot_track: add one work queue vfs,hot_track: register one memory shrinker vfs,hot_track: add one new ioctl interface vfs,hot_track: add debugfs support vfs,hot_track: turn some Micro into be tunable btrfs: add hot tracking support vfs,hot_track: add the documentation Documentation/filesystems/00-INDEX | 2 + Documentation/filesystems/hot_tracking.txt | 164 ++++ 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/hot_tracking.c | 1308 ++++++++++++++++++++++++++++ fs/hot_tracking.h | 91 ++ fs/ioctl.c | 76 ++ 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 | 125 +++ kernel/sysctl.c | 14 + mm/filemap.c | 6 + mm/page-writeback.c | 12 + mm/readahead.c | 6 + 21 files changed, 1896 insertions(+), 2 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 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
