Miao Xie fa7c14947a Btrfs: improve jitter performance of the sequential buffered write ... The performance was slowed down sometimes when we ran sysbench to measure the performance of the sequential buffered write by 2 or more threads. It was because the write order of the test threads might be confused by the task scheduler, and the coming write would be beyond the end of the file, in this case, we need insert dummy file extents and create a hole for the area we skip. But in order to avoid the ongoing ordered extents which are in the area, we need wait for them. Unfortunately, the current code doesn't check if there are ordered extents in the area or not, try to find and flush the dirty pages directly, but in fact, there is no dirty page in that area, this step of the current code is unnecessary, and just wastes time. Sometimes, it would increase the contention of some locks, and makes the performance slow down suddenly. So we remove the ordered extent flush function before the check, and flush the dirty pages and wait for the ordered extents only when we find them. According to my test, we got 1-2 times of the performance regression when we ran the test by 10 times before applying this patch. After applying this patch, the regression went away. Test Environment: CPU: 1CPU * 4Cores Memory: 6GB Partition: 20GB Test Command: # sysbench --test=fileio --file-total-size=16G --file-test-mode=seqwr \ > --num-threads=512 --file-block-size=16384 --max-time=60 --max-requests=0 run Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>		2013-11-11 21:54:38 -05:00
..
9p	9p: don't forget to destroy inode cache if fscache registration fails	2013-09-17 22:31:01 -04:00
adfs	truncate: drop 'oldsize' truncate_pagecache() parameter	2013-09-12 15:38:02 -07:00
affs	truncate: drop 'oldsize' truncate_pagecache() parameter	2013-09-12 15:38:02 -07:00
afs	afs: dget_parent() can't return a negative dentry	2013-09-29 22:02:24 -04:00
autofs4	autofs4: close the races around autofs4_notify_daemon()	2013-09-16 19:16:38 -04:00
befs
bfs	truncate: drop 'oldsize' truncate_pagecache() parameter	2013-09-12 15:38:02 -07:00
btrfs	Btrfs: improve jitter performance of the sequential buffered write	2013-11-11 21:54:38 -05:00
cachefiles	CacheFiles: Don't try to dump the index key if the cookie has been cleared	2013-09-20 15:15:43 -07:00
ceph	ceph: use d_invalidate() to invalidate aliases	2013-09-06 12:55:29 -07:00
cifs	cifs: ntstatus_to_dos_map[] is not terminated	2013-10-14 12:14:01 -05:00
coda
configfs
cramfs
debugfs
devpts
dlm
ecryptfs	eCryptfs: fix 32 bit corruption issue	2013-10-24 12:36:30 -07:00
efivarfs
efs	efs: iget_locked() doesn't return an ERR_PTR()	2013-08-24 12:10:22 -04:00
exofs	truncate: drop 'oldsize' truncate_pagecache() parameter	2013-09-12 15:38:02 -07:00
exportfs	exportfs: don't assume that ->iterate() won't feed us too long entries	2013-09-07 19:54:55 -04:00
ext2	truncate: drop 'oldsize' truncate_pagecache() parameter	2013-09-12 15:38:02 -07:00
ext3	ext[34]: fix double put in tmpfile	2013-10-15 12:14:06 -04:00
ext4	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2013-10-16 17:18:18 -07:00
f2fs	f2fs: optimize gc for better performance	2013-09-05 13:50:32 +09:00
fat	truncate: drop 'oldsize' truncate_pagecache() parameter	2013-09-12 15:38:02 -07:00
freevxfs
fscache	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client	2013-09-19 12:50:37 -05:00
fuse	fuse: no RCU mode in fuse_access()	2013-10-01 16:41:23 +02:00
gfs2	gfs2: set FILE_CREATED	2013-09-16 19:17:24 -04:00
hfs	truncate: drop 'oldsize' truncate_pagecache() parameter	2013-09-12 15:38:02 -07:00
hfsplus	truncate: drop 'oldsize' truncate_pagecache() parameter	2013-09-12 15:38:02 -07:00
hostfs	um: hostfs: Fix writeback	2013-09-07 10:38:29 +02:00
hpfs	truncate: drop 'oldsize' truncate_pagecache() parameter	2013-09-12 15:38:02 -07:00
hppfs
hugetlbfs	cope with potentially long ->d_dname() output for shmem/hugetlb	2013-08-24 12:10:17 -04:00
isofs
jbd
jbd2	jbd2: Fix endian mixing problems in the checksumming code	2013-08-28 14:59:58 -04:00
jffs2
jfs	Just a patch to fix an oops in an error path.	2013-10-22 09:01:11 +01:00
lockd
logfs
minix	truncate: drop 'oldsize' truncate_pagecache() parameter	2013-09-12 15:38:02 -07:00
ncpfs
nfs	NFS: Give "flavor" an initial value to fix a compile warning	2013-09-29 16:03:34 -04:00
nfs_common
nfsd	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2013-09-12 15:01:38 -07:00
nilfs2	nilfs2: fix issue with race condition of competition between segments for dirty blocks	2013-09-30 14:31:02 -07:00
nls
notify
ntfs	truncate: drop 'oldsize' truncate_pagecache() parameter	2013-09-12 15:38:02 -07:00
ocfs2	ocfs2: needs ->d_lock to poke in ->d_parent->d_inode from ->d_revalidate()	2013-09-29 22:02:20 -04:00
omfs	truncate: drop 'oldsize' truncate_pagecache() parameter	2013-09-12 15:38:02 -07:00
openpromfs
proc	procfs: call default get_unmapped_area on MMU-present architectures	2013-10-16 21:35:53 -07:00
pstore	pstore: Remove the messages related to compression failure	2013-09-16 09:28:29 -07:00
qnx4
qnx6
quota	fs: convert fs shrinkers to new scan/count API	2013-09-10 18:56:31 -04:00
ramfs	initmpfs: move rootfs code from fs/ramfs/ to init/	2013-09-11 15:59:37 -07:00
reiserfs	reiserfs: fix race with flush_used_journal_lists and flush_journal_list	2013-09-24 11:24:21 +02:00
romfs
squashfs	Squashfs: add corruption check for type in squashfs_readdir()	2013-09-06 04:57:54 +01:00
sysfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2013-09-07 14:36:57 -07:00
sysv	sysv: Add forgotten superblock lock init for v7 fs	2013-09-29 22:02:02 -04:00
ubifs	Just one patch which fixes the power-cut recovery testing mode.	2013-09-16 15:36:55 -04:00
udf	udf: Fortify LVID loading	2013-09-24 11:23:33 +02:00
ufs	truncate: drop 'oldsize' truncate_pagecache() parameter	2013-09-12 15:38:02 -07:00
xfs	xfs: Use kmem_free() instead of free()	2013-10-04 13:56:12 -05:00
aio.c	aio: fix use-after-free in aio_migratepage	2013-09-26 20:34:51 -04:00
anon_inodes.c
attr.c
bad_inode.c
binfmt_aout.c
binfmt_elf_fdpic.c
binfmt_elf.c	fs/binfmt_elf.c: prevent a coredump with a large vm_map_count from Oopsing	2013-09-30 14:31:01 -07:00
binfmt_em86.c
binfmt_flat.c
binfmt_misc.c
binfmt_script.c
binfmt_som.c
bio-integrity.c	Merge branch 'for-3.12/core' of git://git.kernel.dk/linux-block	2013-09-22 15:00:11 -07:00
bio.c	block: Fix bio_copy_data()	2013-09-24 14:41:42 -07:00
block_dev.c	a trivial writeback fix	2013-09-13 23:06:40 -04:00
buffer.c	fs: buffer: move allocation failure loop into the allocator	2013-10-16 21:35:53 -07:00
char_dev.c
compat_binfmt_elf.c
compat_ioctl.c
compat.c
coredump.c	coredump: add new %P variable in core_pattern	2013-09-11 15:59:01 -07:00
coredump.h
dcache.c	vfs: decrapify dput(), fix cache behavior under normal load	2013-10-31 15:43:02 -07:00
dcookies.c
direct-io.c	direct-io: Use return from cmpxchg to decide of assignment happened	2013-09-09 10:47:42 -07:00
drop_caches.c	shrinker: add node awareness	2013-09-10 18:56:31 -04:00
eventfd.c
eventpoll.c	Revert "epoll: use freezable blocking call"	2013-10-30 15:27:53 +01:00
exec.c	exec: cleanup the error handling in search_binary_handler()	2013-09-11 15:59:09 -07:00
fcntl.c
fhandle.c
file_table.c	nfsd regression since delayed fput()	2013-10-20 08:44:39 -04:00
file.c
filesystems.c
fs_struct.c
fs-writeback.c	a trivial writeback fix	2013-09-13 23:06:40 -04:00
generic_acl.c
inode.c	fs: convert inode and dentry shrinking to be node aware	2013-09-10 18:56:31 -04:00
internal.h	fs: convert inode and dentry shrinking to be node aware	2013-09-10 18:56:31 -04:00
ioctl.c
ioprio.c
Kconfig
Kconfig.binfmt
libfs.c
locks.c
Makefile
mbcache.c	fs: convert fs shrinkers to new scan/count API	2013-09-10 18:56:31 -04:00
mount.h
mpage.c
namei.c	fs/namei.c: fix new kernel-doc warning	2013-10-22 12:02:40 +01:00
namespace.c	initmpfs: move rootfs code from fs/ramfs/ to init/	2013-09-11 15:59:37 -07:00
no-block.c
open.c	vfs: improve i_op->atomic_open() documentation	2013-09-16 19:17:24 -04:00
pipe.c
pnode.c
pnode.h	vfs: Don't copy mount bind mounts of /proc/<pid>/ns/mnt between namespaces	2013-08-26 18:42:15 -07:00
posix_acl.c
proc_namespace.c
read_write.c
readdir.c
select.c	Revert "select: use freezable blocking call"	2013-10-30 15:28:35 +01:00
seq_file.c	seq_file: always update file->f_pos in seq_lseek()	2013-10-25 10:46:40 -04:00
signalfd.c
splice.c
stack.c
stat.c	quota: provide interface for readding allocated space into reserved space	2013-08-17 09:32:32 -04:00
statfs.c	vfs: allow O_PATH file descriptors for fstatfs()	2013-10-12 13:12:31 -07:00
super.c	fs/super.c: fix lru_list leak for real	2013-10-01 13:11:21 -04:00
sync.c
timerfd.c
utimes.c
xattr_acl.c
xattr.c