Liu Bo 4e2f84e63d Btrfs: improve fsync by filtering extents that we want ... This is based on Josef's "Btrfs: turbo charge fsync". The above Josef's patch performs very good in random sync write test, because we won't have too much extents to merge. However, it does not performs good on the test: dd if=/dev/zero of=foobar bs=4k count=12500 oflag=sync The reason is when we do sequencial sync write, we need to merge the current extent just with the previous one, so that we can get accumulated extents to log: A(4k) --> AA(8k) --> AAA(12k) --> AAAA(16k) ... So we'll have to flush more and more checksum into log tree, which is the bottleneck according to my tests. But we can avoid this by telling fsync the real extents that are needed to be logged. With this, I did the above dd sync write test (size=50m), w/o (orig) w/ (josef's) w/ (this) SATA 104KB/s 109KB/s 121KB/s ramdisk 1.5MB/s 1.5MB/s 10.7MB/s (613%) Signed-off-by: Liu Bo <bo.li.liu@oracle.com>		2012-10-01 15:19:05 -04:00
..
acl.c	Btrfs: cache no acl on new inodes	2012-05-30 10:23:27 -04:00
async-thread.c	Btrfs: call the ordered free operation without any locks held	2012-07-25 16:15:07 -04:00
async-thread.h	btrfs: return void in functions without error conditions	2012-03-22 01:45:34 +01:00
backref.c	Btrfs: fix gcc warnings for 32bit compiles	2012-10-01 15:19:01 -04:00
backref.h	Merge branch 'send-v2' of git://github.com/ablock84/linux-btrfs into for-linus	2012-07-25 19:19:10 -04:00
btrfs_inode.h	Btrfs: turbo charge fsync	2012-10-01 15:19:03 -04:00
check-integrity.c	Btrfs: introduce subvol uuids and times	2012-07-25 23:28:38 +02:00
check-integrity.h	Btrfs: add optional integrity check code	2011-12-21 19:14:09 +01:00
compat.h
compression.c	Btrfs: barrier before waitqueue_active	2012-08-28 16:53:33 -04:00
compression.h	btrfs: return void in functions without error conditions	2012-03-22 01:45:34 +01:00
ctree.c	Btrfs: fix btrfs send for inline items and compression	2012-10-01 15:19:00 -04:00
ctree.h	Btrfs: do not needlessly restart the transaction for enospc	2012-10-01 15:19:04 -04:00
delayed-inode.c	Btrfs: barrier before waitqueue_active	2012-08-28 16:53:33 -04:00
delayed-inode.h	Btrfs: flush delayed inodes if we're short on space	2012-07-23 15:41:40 -04:00
delayed-ref.c	Btrfs: allow delayed refs to be merged	2012-08-28 16:53:38 -04:00
delayed-ref.h	Btrfs: allow delayed refs to be merged	2012-08-28 16:53:38 -04:00
dir-item.c	btrfs: replace many BUG_ONs with proper error handling	2012-03-22 11:52:54 +01:00
disk-io.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs	2012-08-29 11:36:22 -07:00
disk-io.h	Btrfs: remove superblock writing after fatal error	2012-08-28 16:53:38 -04:00
export.c	->encode_fh() API change	2012-05-29 23:28:33 -04:00
export.h
extent-tree.c	Btrfs: do not needlessly restart the transaction for enospc	2012-10-01 15:19:04 -04:00
extent_io.c	Btrfs: fix btrfs send for inline items and compression	2012-10-01 15:19:00 -04:00
extent_io.h	Merge branch 'for-chris' of git://git.jan-o-sch.net/btrfs-unstable into for-linus	2012-05-31 16:49:53 -04:00
extent_map.c	Btrfs: improve fsync by filtering extents that we want	2012-10-01 15:19:05 -04:00
extent_map.h	Btrfs: improve fsync by filtering extents that we want	2012-10-01 15:19:05 -04:00
file-item.c	Btrfs: fix gcc warnings for 32bit compiles	2012-10-01 15:19:01 -04:00
file.c	Btrfs: turbo charge fsync	2012-10-01 15:19:03 -04:00
free-space-cache.c	Btrfs: do not count in readonly bytes	2012-07-23 16:28:03 -04:00
free-space-cache.h	btrfs: remove all unused functions	2011-05-06 12:34:03 +02:00
hash.h
inode-item.c	Merge branch 'error-handling' into for-linus	2012-03-28 20:31:37 -04:00
inode-map.c	Btrfs: show useful info in space reservation tracepoint	2012-03-29 09:57:44 -04:00
inode-map.h	Btrfs: Support reading/writing on disk free ino cache	2011-04-25 16:46:11 +08:00
inode.c	Btrfs: improve fsync by filtering extents that we want	2012-10-01 15:19:05 -04:00
ioctl.c	Btrfs: turbo charge fsync	2012-10-01 15:19:03 -04:00
ioctl.h	Merge branch 'send-v2' of git://github.com/ablock84/linux-btrfs into for-linus	2012-07-25 19:19:10 -04:00
Kconfig	Btrfs: add config option to enable btrfs integrity check	2011-12-21 19:14:16 +01:00
locking.c	Btrfs: fix a misplaced address operator in a condition	2012-08-28 16:53:23 -04:00
locking.h	btrfs: return void in functions without error conditions	2012-03-22 01:45:34 +01:00
lzo.c	btrfs: remove the second argument of k[un]map_atomic()	2012-03-20 21:48:21 +08:00
Makefile	Merge branch 'send-v2' of git://github.com/ablock84/linux-btrfs into for-linus	2012-07-25 19:19:10 -04:00
ordered-data.c	btrfs: nuke pdflush from comments	2012-08-04 12:15:35 +04:00
ordered-data.h	Btrfs: finish ordered extents in their own thread	2012-05-30 10:23:33 -04:00
orphan.c	btrfs: replace many BUG_ONs with proper error handling	2012-03-22 11:52:54 +01:00
print-tree.c	Btrfs: read device stats on mount, write modified ones during commit	2012-05-30 10:23:41 -04:00
print-tree.h
qgroup.c	Btrfs: fix gcc warnings for 32bit compiles	2012-10-01 15:19:01 -04:00
rcu-string.h	Btrfs: use rcu to protect device->name	2012-06-14 21:29:16 -04:00
reada.c	Btrfs: set ioprio of scrub readahead to idle	2012-05-30 10:23:43 -04:00
relocation.c	btrfs: use printk_get_level and printk_skip_level, add __printf, fix fallout	2012-07-30 17:25:14 -07:00
root-tree.c	Btrfs: fix some endian bugs handling the root times	2012-08-28 16:53:26 -04:00
scrub.c	Btrfs: use rcu to protect device->name	2012-06-14 21:29:16 -04:00
send.c	Btrfs: fix gcc warnings for 32bit compiles	2012-10-01 15:19:01 -04:00
send.h	Btrfs: introduce BTRFS_IOC_SEND for btrfs send/receive	2012-07-25 23:30:19 +02:00
struct-funcs.c	Btrfs: rewrite BTRFS_SETGET_FUNCS	2012-07-23 16:28:06 -04:00
super.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs	2012-08-29 11:36:22 -07:00
sysfs.c	btrfs: Remove unused sysfs code	2011-06-17 14:54:18 -04:00
transaction.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs	2012-08-29 11:36:22 -07:00
transaction.h	Merge branch 'qgroup' of git://git.jan-o-sch.net/btrfs-unstable into for-linus	2012-07-25 16:11:38 -04:00
tree-defrag.c	btrfs: drop unused parameter from btrfs_release_path	2011-05-02 13:57:22 +02:00
tree-log.c	Btrfs: improve fsync by filtering extents that we want	2012-10-01 15:19:05 -04:00
tree-log.h	btrfs: return void in functions without error conditions	2012-03-22 01:45:34 +01:00
ulist.c	Btrfs: make aux field of ulist 64 bit	2012-10-01 15:18:53 -04:00
ulist.h	Btrfs: make aux field of ulist 64 bit	2012-10-01 15:18:53 -04:00
version.h
volumes.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs	2012-08-29 11:36:22 -07:00
volumes.h	Btrfs: revert checksum error statistic which can cause a BUG()	2012-08-28 16:53:39 -04:00
xattr.c	Btrfs: use i_version instead of our own sequence	2012-05-30 10:23:27 -04:00
xattr.h	fs/vfs/security: pass last path component to LSM on inode creation	2011-02-01 11:12:29 -05:00
zlib.c	btrfs: remove the second argument of k[un]map_atomic()	2012-03-20 21:48:21 +08:00