Wu Fengguang b3af9468ae writeback: don't delay inodes redirtied by a fast dirtier ... Debug traces show that in per-bdi writeback, the inode under writeback almost always get redirtied by a busy dirtier. We used to call redirty_tail() in this case, which could delay inode for up to 30s. This is unacceptable because it now happens so frequently for plain cp/dd, that the accumulated delays could make writeback of big files very slow. So let's distinguish between data redirty and metadata only redirty. The first one is caused by a busy dirtier, while the latter one could happen in XFS, NFS, etc. when they are doing delalloc or updating isize. The inode being busy dirtied will now be requeued for next io, while the inode being redirtied by fs will continue to be delayed to avoid repeated IO. CC: Jan Kara <jack@suse.cz> CC: Theodore Ts'o <tytso@mit.edu> CC: Dave Chinner <david@fromorbit.com> CC: Chris Mason <chris.mason@oracle.com> CC: Christoph Hellwig <hch@infradead.org> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>		2009-09-25 18:08:26 +02:00
..
9p	9p: remove unnecessary v9fses->options which duplicates the mount string	2009-08-17 16:42:28 -05:00
adfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
affs	affs: add ->sync_fs	2009-06-11 21:36:14 -04:00
afs	const: make file_lock_operations const	2009-09-22 07:17:25 -07:00
autofs	trivial: remove unnecessary semicolons	2009-09-21 15:14:58 +02:00
autofs4	autofs4 - fix missed case when changing to use struct path	2009-08-31 17:44:05 -10:00
befs	const: mark remaining super_operations const	2009-09-22 07:17:24 -07:00
bfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
btrfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
cachefiles	enforce ->sync_fs is only called for rw superblock	2009-06-11 21:36:06 -04:00
cifs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
coda	splice: implement default splice_read method	2009-05-11 14:13:10 +02:00
configfs	writeback: add name to backing_dev_info	2009-09-11 09:20:26 +02:00
cramfs	fs/cramfs: return f_fsid for statfs(2)	2009-04-02 19:05:08 -07:00
debugfs	debugfs: use specified mode to possibly mark files read/write only	2009-06-15 21:30:28 -07:00
devpts	devpts: remove module-related code	2009-06-24 08:15:24 -04:00
dlm	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm	2009-09-18 09:19:10 -07:00
ecryptfs	const: mark remaining address_space_operations const	2009-09-22 07:17:24 -07:00
efs	get rid of BKL in fs/efs	2009-06-17 00:36:36 -04:00
exofs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
exportfs
ext2	const: make block_device_operations const	2009-09-22 07:17:25 -07:00
ext3	const: make struct super_block::s_qcop const	2009-09-22 07:17:24 -07:00
ext4	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
fat	fat: Opencode sync_page_range_nolock()	2009-09-14 17:08:17 +02:00
freevxfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
fscache	FS-Cache: Fixup renamed filenames in comments in internal.h	2009-05-27 10:20:13 -07:00
fuse	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse	2009-09-18 09:23:03 -07:00
gfs2	trivial: fix typo "to to" in multiple files	2009-09-21 15:14:55 +02:00
hfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
hfsplus	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
hostfs	hostfs: set maximum filesize in superblock for proper LFS support	2009-06-30 18:56:03 -07:00
hpfs	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
hppfs	hppfs: hppfs_read_file() may return -ERROR	2009-04-02 19:04:53 -07:00
hugetlbfs	hugetlbfs: allow the creation of files suitable for MAP_PRIVATE on the vfs internal mount	2009-09-22 07:17:41 -07:00
isofs	isofs: fix Joliet regression	2009-07-10 19:18:59 -07:00
jbd	jbd: Annotate transaction start also for journal_restart()	2009-09-16 17:44:10 +02:00
jbd2	writeback: get rid of wbc->for_writepages	2009-09-16 15:16:18 +02:00
jffs2	const: mark remaining export_operations const	2009-09-22 07:17:24 -07:00
jfs	jffs2/jfs/xfs: switch over to 'check_acl' rather than 'permission()'	2009-09-08 11:09:04 -07:00
lockd	Merge branch 'for-2.6.32' of git://linux-nfs.org/~bfields/linux	2009-09-22 07:54:33 -07:00
minix	Making fs/minix/minix.h double including safe	2009-06-22 11:34:42 -07:00
ncpfs	NLS: update handling of Unicode	2009-06-15 21:44:43 -07:00
nfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
nfs_common
nfsd	Merge branch 'for-2.6.32' of git://linux-nfs.org/~bfields/linux	2009-09-22 07:54:33 -07:00
nilfs2	const: mark remaining inode_operations as const	2009-09-22 07:17:24 -07:00
nls	NLS: update handling of Unicode	2009-06-15 21:44:43 -07:00
notify	inotify: update the group mask on mark addition	2009-08-28 12:51:14 -04:00
ntfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
ocfs2	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
omfs	const: mark remaining inode_operations as const	2009-09-22 07:17:24 -07:00
openpromfs
partitions	const: make block_device_operations const	2009-09-22 07:17:25 -07:00
proc	oom: fix oom_adjust_write() input sanity check	2009-09-22 07:17:39 -07:00
qnx4	fs/qnx4: sanitize includes	2009-06-11 21:36:12 -04:00
quota	const: make struct super_block::s_qcop const	2009-09-22 07:17:24 -07:00
ramfs	writeback: add name to backing_dev_info	2009-09-11 09:20:26 +02:00
reiserfs	const: make struct super_block::s_qcop const	2009-09-22 07:17:24 -07:00
romfs	const: mark remaining inode_operations as const	2009-09-22 07:17:24 -07:00
smbfs	push BKL down into ->put_super	2009-06-11 21:36:07 -04:00
squashfs	const: mark remaining super_operations const	2009-09-22 07:17:24 -07:00
sysfs	Merge branch 'writeback' of git://git.kernel.dk/linux-2.6-block	2009-09-11 09:17:05 -07:00
sysv	get rid of BKL in fs/sysv	2009-06-17 00:36:37 -04:00
ubifs	const: mark remaining address_space_operations const	2009-09-22 07:17:24 -07:00
udf	udf: Fix possible corruption when close races with write	2009-09-14 19:13:01 +02:00
ufs	ufs: sector_t cannot be negative	2009-06-18 13:03:46 -07:00
xfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
aio.c	mm: move use_mm/unuse_mm from aio.c to mm/	2009-09-22 07:17:42 -07:00
anon_inodes.c	fs: Provide empty .set_page_dirty() aop for anon inodes	2009-06-18 14:46:10 +02:00
attr.c	vfs: Use lowercase names of quota functions	2009-03-26 02:18:35 +01:00
bad_inode.c
binfmt_aout.c
binfmt_elf_fdpic.c	mm: add get_dump_page	2009-09-22 07:17:40 -07:00
binfmt_elf.c	mm: add get_dump_page	2009-09-22 07:17:40 -07:00
binfmt_em86.c
binfmt_flat.c	flat: fix uninitialized ptr with shared libs	2009-08-07 10:39:57 -07:00
binfmt_misc.c
binfmt_script.c
binfmt_som.c	Don't crap into descriptor table in binfmt_som	2009-03-31 23:00:28 -04:00
bio-integrity.c	block: Create bip slabs with embedded integrity vectors	2009-07-01 10:56:25 +02:00
bio.c	block: fix sg SG_DXFER_TO_FROM_DEV regression	2009-07-10 20:31:53 +02:00
block_dev.c	const: make block_device_operations const	2009-09-22 07:17:25 -07:00
buffer.c	writeback: get rid to incorrect references to pdflush in comments	2009-09-25 18:08:25 +02:00
char_dev.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6	2009-09-11 09:19:35 -07:00
compat_binfmt_elf.c
compat_ioctl.c	compat_ioctl: hook up compat handler for FIEMAP ioctl	2009-08-07 10:39:56 -07:00
compat.c	exec: do not sleep in TASK_TRACED under ->cred_guard_mutex	2009-09-05 11:30:42 -07:00
dcache.c	sched: Pull up the might_sleep() check into cond_resched()	2009-07-18 15:51:44 +02:00
dcookies.c
direct-io.c	block: Do away with the notion of hardsect_size	2009-05-22 23:22:54 +02:00
drop_caches.c	mm: remove __invalidate_mapping_pages variant	2009-06-16 19:47:43 -07:00
eventfd.c	eventfd: revised interface and cleanups	2009-06-30 18:55:58 -07:00
eventpoll.c	epoll: fix nested calls support	2009-06-18 13:03:41 -07:00
exec.c	perf: Do the big rename: Performance Counters -> Performance Events	2009-09-21 14:28:04 +02:00
fcntl.c	headers: smp_lock.h redux	2009-07-12 12:22:34 -07:00
fifo.c
file_table.c	fs: move mark_files_ro into file_table.c	2009-06-11 21:36:02 -04:00
file.c
filesystems.c	fs: Mark get_filesystem_list() as __init function.	2009-04-20 23:02:52 -04:00
fs_struct.c	Get rid of indirect include of fs_struct.h	2009-03-31 23:00:27 -04:00
fs-writeback.c	writeback: don't delay inodes redirtied by a fast dirtier	2009-09-25 18:08:26 +02:00
generic_acl.c	New helper - current_umask()	2009-03-31 23:00:26 -04:00
inode.c	const: mark remaining inode_operations as const	2009-09-22 07:17:24 -07:00
internal.h	Trim a bit of crap from fs.h	2009-06-11 21:36:07 -04:00
ioctl.c	fs: Add new pre-allocation ioctls to vfs for compatibility with legacy xfs ioctls	2009-06-24 08:15:27 -04:00
ioprio.c
Kconfig	tmpfs: depend on shmem	2009-09-22 07:17:41 -07:00
Kconfig.binfmt
libfs.c	vfs: make get_sb_pseudo set s_maxbytes to value that can be cast to signed	2009-08-18 16:31:12 -07:00
locks.c	const: make lock_manager_operations const	2009-09-22 07:17:25 -07:00
Makefile	nilfs2: update makefile and Kconfig	2009-04-07 08:31:16 -07:00
mbcache.c
mpage.c	ext4: Properly initialize the buffer_head state	2009-05-13 15:13:42 -04:00
namei.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6	2009-09-11 08:55:49 -07:00
namespace.c	vfs: mnt_want_write_file(): fix special file handling	2009-08-07 10:39:56 -07:00
nfsctl.c
no-block.c
open.c	CRED: Add some configurable debugging [try #6]	2009-09-02 21:29:01 +10:00
pipe.c	lockdep: Fix lockdep annotation for pipe_double_lock()	2009-07-22 21:14:14 +02:00
pnode.c
pnode.h
posix_acl.c
read_write.c	splice: implement default splice_read method	2009-05-11 14:13:10 +02:00
read_write.h
readdir.c
select.c	poll/select: initialize triggered field of struct poll_wqueues	2009-08-15 18:40:11 -07:00
seq_file.c	seq_file: add function to write binary data	2009-06-18 13:03:57 -07:00
signalfd.c
splice.c	Merge branch 'for-2.6.32' of git://git.kernel.dk/linux-2.6-block	2009-09-14 17:55:15 -07:00
stack.c
stat.c	kill vfs_stat_fd / vfs_lstat_fd	2009-04-20 23:02:52 -04:00
super.c	const: mark remaining super_operations const	2009-09-22 07:17:24 -07:00
sync.c	fs: Assign bdi in super_block	2009-09-16 15:18:51 +02:00
timerfd.c
utimes.c
xattr_acl.c
xattr.c	VFS: Factor out part of vfs_setxattr so it can be called from the SELinux hook for inode_setsecctx.	2009-09-10 10:11:22 +10:00