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Date: Wed, 22 May 2013 06:55:35 +0800 From: Zhi Yong Wu <zwu.kernel@...il.com> To: viro@...iv.linux.org.uk Cc: linux-kernel mlist <linux-kernel@...r.kernel.org>, "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>, linux-btrfs@...r.kernel.org, sekharan@...ibm.com, Ram Pai <linuxram@...ibm.com>, Dave Chinner <david@...morbit.com>, dsterba@...e.cz, Greg KH <gregkh@...uxfoundation.org>, paulmck@...ux.vnet.ibm.com, chris.mason@...ionio.com, Zhi Yong Wu <wuzhy@...ux.vnet.ibm.com>, torvalds@...ux-foundation.org Subject: Re: [PATCH v2 00/12] VFS hot tracking Ping... On Tue, May 14, 2013 at 8:59 AM, <zwu.kernel@...il.com> wrote: > From: Zhi Yong Wu <wuzhy@...ux.vnet.ibm.com> > > The patchset is trying to introduce hot tracking function in > VFS layer, which will keep track of real disk I/O in memory. > By it, you will easily know more details about disk I/O, and > then detect where disk I/O hot spots are. Also, specific FS > can take use of it to do accurate defragment, and hot relocation > support, etc. > > After V1 was sent out, Chandra Seetharaman has reviewed and > made a lot of comments, thanks a lot to him. Not it's time to > send out its V2 for external review, 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 how to use and more other info and performance report, > please check hot_tracking.txt in Documentation and following > links: > 1.) http://lwn.net/Articles/525651/ > 2.) https://lkml.org/lkml/2012/12/20/199 > > Changelog from v1: > - Refactored to be under RCU [Chandra Seetharaman] > - Merged some code changes [Chandra Seetharaman] > - Fixed some issues [Chandra Seetharaman] > > v1: > - Solved 64 bits inode number issue. [David Sterba] > - 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] > > rfcv4: > - Introduce hot func registering framework [Zhiyong] > - Remove global variable for hot tracking [Zhiyong] > - Add btrfs hot tracking support [Zhiyong] > > rfcv3: > 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] > > rfcv2: > 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] > > rfcv1: > 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] > > Zhi Yong Wu (12): > VFS hot tracking: introduce some data structures > VFS hot tracking: add i/o freq tracking hooks > VFS hot tracking: add one workqueue to update hot map > VFS hot tracking: register one shrinker > VFS hot tracking, rcu: introduce one rcu macro for list > VFS hot tracking, seq_file: introduce one set of rcu seq_list > interfaces > VFS hot tracking: add debugfs support > VFS hot tracking: add one ioctl interface > VFS hot tracking, procfs: add two proc interfaces > VFS hot tracking, btrfs: add hot tracking support > VFS hot tracking: add documentation > VFS hot tracking: add fs hot type support > > Documentation/filesystems/00-INDEX | 2 + > Documentation/filesystems/hot_tracking.txt | 256 ++++++ > 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 | 5 + > fs/hot_tracking.c | 1320 ++++++++++++++++++++++++++++ > fs/hot_tracking.h | 67 ++ > fs/ioctl.c | 70 ++ > fs/namei.c | 2 + > fs/seq_file.c | 37 + > include/linux/fs.h | 5 + > include/linux/hot_tracking.h | 175 ++++ > include/linux/rculist.h | 5 + > include/linux/seq_file.h | 7 + > kernel/sysctl.c | 14 + > mm/filemap.c | 6 + > mm/page-writeback.c | 12 + > mm/readahead.c | 6 + > 21 files changed, 2019 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 > > -- > 1.7.11.7 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Regards, Zhi Yong Wu -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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