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 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 -- 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
