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Message-Id: <1348487060-19598-1-git-send-email-dmonakhov@openvz.org>
Date: Mon, 24 Sep 2012 15:44:10 +0400
From: Dmitry Monakhov <dmonakhov@...nvz.org>
To: linux-ext4@...r.kernel.org
Cc: tytso@....edu, jack@...e.cz, lczerner@...hat.com,
Dmitry Monakhov <dmonakhov@...nvz.org>
Subject: [PATCH 00/10] ext4: Bunch of DIO/AIO fixes V3
There are number of races exist caused by lack of synchronization
between DIO workers in flight and truncate/fsync/punch_hole routines
This patch series try to optimize and fix existing DIO/AIO code
I observe significant performance improvements for big SMP hosts
performind DIO for single file.
Testcases which helps me to catch this type of bugs was posted here
http://www.spinics.net/lists/linux-fsdevel/msg58312.html
or available on my github repo:
https://github.com/dmonakhov/xfstests/tree/ce8e3adab629b2a9be8ba2e73db7dad49eb46614
plese run 286,287,288
TOC:
# first two are cleanups
ext4: ext4_inode_info diet
ext4: give i_aiodio_unwritten more appropriate name
# Cleanup and bug fixes
ext4: fix unwritten counter leakage
ext4: completed_io locking cleanup V3
ext4: serialize dio nonlocked reads with defrag workers V3
ext4: punch_hole should wait for DIO writers
ext4: serialize unlocked dio reads with truncate
ext4: endless truncate due to nonlocked dio readers V2
ext4: serialize truncate with owerwrite DIO workers V2
ext4: fix ext_remove_space for punch_hole case
Changes from V2:
Fix use-after-free for queued end_io_work.
fs/ext4/ext4.h | 33 ++++++++++---
fs/ext4/extents.c | 88 +++++++++++++++++++++++-------------
fs/ext4/file.c | 9 ---
fs/ext4/fsync.c | 85 -----------------------------------
fs/ext4/indirect.c | 19 ++++++-
fs/ext4/inode.c | 49 ++++++++------------
fs/ext4/move_extent.c | 8 +++
fs/ext4/page-io.c | 121 +++++++++++++++++++++++++++++---------------------
fs/ext4/super.c | 3 -
10 files changed, 201 insertions(+), 216 deletions(-)
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