From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753703Ab2IWM5B (ORCPT ); Sun, 23 Sep 2012 08:57:01 -0400 Received: from e3.ny.us.ibm.com ([32.97.182.143]:43571 "EHLO e3.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753530Ab2IWM46 (ORCPT ); Sun, 23 Sep 2012 08:56:58 -0400 From: zwu.kernel@gmail.com To: linux-fsdevel@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linuxram@linux.vnet.ibm.com, viro@zeniv.linux.org.uk, cmm@us.ibm.com, tytso@mit.edu, marco.stornelli@gmail.com, david@fromorbit.com, stroetmann@ontolinux.com, diegocg@gmail.com, chris@csamuel.org, Zhi Yong Wu Subject: [RFC v2 00/10] vfs: hot data tracking Date: Sun, 23 Sep 2012 20:56:25 +0800 Message-Id: <1348404995-14372-1-git-send-email-zwu.kernel@gmail.com> X-Mailer: git-send-email 1.7.6.5 x-cbid: 12092312-8974-0000-0000-00000E43EE08 X-IBM-ISS-SpamDetectors: X-IBM-ISS-DetailInfo: BY=3.00000294; HX=3.00000196; KW=3.00000007; PH=3.00000001; SC=3.00000007; SDB=6.00176596; UDB=6.00039989; UTC=2012-09-23 12:56:57 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Zhi Yong Wu NOTE: The patchset is currently post out mainly to make sure it is going in the correct direction and hope to get some helpful comments from other guys. For more infomation, please check hot_tracking.txt in Documentation TODO List: 1.) Need to do scalability or performance tests. 2.) Turn some Micro into be tunable TIME_TO_KICK, and HEAT_UPDATE_DELAY 3.) Rafactor hot_hash_is_aging() If you just made the timeout value a timespec and compared the _timespecs_, you would be doing a lot fewer conversions. 4.) Cleanup some unnecessary lock protect 5.) Add more comments to explain how to calc temperature How to "read" the avg read/write time (nanoseconds, microseconds, jiffies....??) 6.) Make updating tempreture more parallel 7.) How to save the file tempreture among the umount to be able to preserve the file tempreture after reboot 8.) Add one new ioctl inteface to set temperature value. 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 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] Zhi Yong Wu (10): vfs: introduce private rb structures vfs: add support for updating access frequency vfs: add one new mount option '-o hottrack' vfs: add init and exit support vfs: introduce one hash table vfs: enable hot data tracking vfs: fork one kthread to update data temperature vfs: add 3 new ioctl interfaces vfs: add debugfs support vfs: add documentation Documentation/filesystems/hot_tracking.txt | 106 ++ fs/Makefile | 2 +- fs/compat_ioctl.c | 8 + fs/dcache.c | 2 + fs/direct-io.c | 10 + fs/hot_tracking.c | 1563 ++++++++++++++++++++++++++++ fs/hot_tracking.h | 163 +++ fs/ioctl.c | 130 +++ fs/namespace.c | 10 + fs/super.c | 11 + include/linux/fs.h | 15 + include/linux/hot_tracking.h | 164 +++ mm/filemap.c | 8 + mm/page-writeback.c | 21 + mm/readahead.c | 9 + 15 files changed, 2221 insertions(+), 1 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