Chris Mason d644d8a1e3 Btrfs: avoid IO stalls behind congested devices in a multi-device FS ... The btrfs IO submission threads try to service a bunch of devices with a small number of threads. They do a congestion check to try and avoid waiting on requests for a busy device. The checks make sure we've sent a few requests down to a given device just so that we aren't bouncing between busy devices without actually sending down any IO. The counter used to decide if we can switch to the next device is somewhat overloaded. It is also being used to decide if we've done a good batch of requests between the WRITE_SYNC or regular priority lists. It may get reset to zero often, leaving us hammering on a busy device instead of moving on to another disk. This commit adds a new counter for the number of bios sent while servicing a device. It doesn't get reset or fiddled with. On multi-device filesystems, this fixes IO stalls in streaming write workloads. Signed-off-by: Chris Mason <chris.mason@oracle.com>		2009-06-10 11:29:49 -04:00
..
9p	Fix a leak in failure exit in 9p ->get_sb()	2009-05-09 10:49:40 -04:00
adfs	fs/adfs: return f_fsid for statfs(2)	2009-04-02 19:05:08 -07:00
affs	Fix races around the access to ->s_options	2009-05-09 10:51:34 -04:00
afs	Fix races around the access to ->s_options	2009-05-09 10:51:34 -04:00
autofs	Fix autofs_expire()	2009-04-20 23:01:15 -04:00
autofs4	autofs4: remove hashed check in validate_wait()	2009-06-09 16:59:03 -07:00
befs	befs: fix build on parisc	2009-04-08 10:21:43 -07:00
bfs	fs/Kconfig: move bfs out	2009-01-22 13:15:57 +03:00
btrfs	Btrfs: avoid IO stalls behind congested devices in a multi-device FS	2009-06-10 11:29:49 -04:00
cachefiles	CacheFiles: Fixup renamed filenames in comments in internal.h	2009-05-27 10:20:13 -07:00
cifs	[CIFS] Avoid open on possible directories since Samba now rejects them	2009-05-23 18:57:25 +00:00
coda	constify dentry_operations: misc filesystems	2009-03-27 14:44:00 -04:00
configfs	configfs: Fix Trivial Warning in fs/configfs/symlink.c	2009-04-21 12:59:21 -07:00
cramfs	fs/cramfs: return f_fsid for statfs(2)	2009-04-02 19:05:08 -07:00
debugfs	debugfs: function to know if debugfs is initialized	2009-03-23 16:25:46 +01:00
devpts	devpts: correctly set default options	2009-05-15 08:03:23 -07:00
dlm	dlm: fix length calculation in compat code	2009-03-11 12:23:59 -05:00
ecryptfs	Convert obvious places to deactivate_locked_super()	2009-05-09 10:49:40 -04:00
efs	fs/efs: return f_fsid for statfs(2)	2009-04-02 19:05:09 -07:00
exofs	exofs: Documentation	2009-03-31 19:44:38 +03:00
exportfs	Merge branch 'next' into for-linus	2008-12-25 11:40:09 +11:00
ext2	ext2: missing unlock in ext2_quota_write()	2009-04-27 16:49:52 +02:00
ext3	ext3: Try to avoid starting a transaction in writepage for data=writepage	2009-04-08 13:15:10 -04:00
ext4	ext4: Fix race in ext4_inode_info.i_cached_extent	2009-05-15 09:07:28 -04:00
fat	vfat: Note the NLS requirement	2009-04-17 09:32:11 -07:00
freevxfs	fs/Kconfig: move vxfs out	2009-01-22 13:15:58 +03:00
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	2009-05-13 16:32:57 -07:00
gfs2	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-05-10 10:49:08 -07:00
hfs	hfs: fix memory leak when unmounting	2009-04-13 15:04:29 -07:00
hfsplus	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
hostfs	constify dentry_operations: misc filesystems	2009-03-27 14:44:00 -04:00
hpfs	Fix races around the access to ->s_options	2009-05-09 10:51:34 -04:00
hppfs	hppfs: hppfs_read_file() may return -ERROR	2009-04-02 19:04:53 -07:00
hugetlbfs	Remove implementation of readpage from the hugetlbfs_aops	2009-05-13 08:04:45 -07:00
isofs	fs/isofs: return f_fsid for statfs(2)	2009-04-02 19:05:09 -07:00
jbd	jbd: fix race in buffer processing in commit code	2009-06-09 16:59:03 -07:00
jbd2	jbd2: use SWRITE_SYNC_PLUG when writing synchronous revoke records	2009-04-14 07:50:56 -04:00
jffs2	jffs2: Fix corruption when flash erase/write failure	2009-05-29 10:44:46 +01:00
jfs	New helper - current_umask()	2009-03-31 23:00:26 -04:00
lockd	lockd: fix list corruption on lockd restart	2009-05-06 17:19:36 -04:00
minix	fs/minix: return f_fsid for statfs(2)	2009-04-02 19:05:09 -07:00
ncpfs	ncpfs: use memdup_user()	2009-04-20 23:02:51 -04:00
nfs	NFSv4: Fix the case where NFSv4 renewal fails	2009-05-26 14:51:00 -04:00
nfs_common	SUNRPC: nfsacl_encode/nfsacl_decode should be exported as GPL-only	2008-12-23 15:21:32 -05:00
nfsd	nfsd: fix hung up of nfs client while sync write data to nfs server	2009-05-27 17:40:06 -04:00
nilfs2	nilfs2: fix bh leak in nilfs_cpfile_delete_checkpoints function	2009-05-30 22:07:50 +09:00
nls	…
notify	inotify: use GFP_NOFS in kernel_event() to work around a lockdep false-positive	2009-05-06 16:36:09 -07:00
ntfs	ntfs: remove private wrapper of endian helpers	2009-04-01 08:59:18 -07:00
ocfs2	ocfs2: Use nd_set_link().	2009-05-09 10:49:40 -04:00
omfs	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2009-04-02 21:09:10 -07:00
openpromfs	zero i_uid/i_gid on inode allocation	2009-01-05 11:54:28 -05:00
partitions	Merge branch 'tracing/core-v2' into tracing-for-linus	2009-04-02 00:49:02 +02:00
proc	procfs: make errno values consistent when open pident vs exit(2) race occurs	2009-05-29 08:40:02 -07:00
qnx4	fs/qnx4: return f_fsid for statfs(2)	2009-04-02 19:05:10 -07:00
quota	quota: remove obsolete comments in fs/quota/Makefile	2009-04-27 16:49:52 +02:00
ramfs	ramfs: fix double freeing s_fs_info on failed mount	2009-04-07 07:39:59 -07:00
reiserfs	reiserfs: fixup perms when xattrs are disabled	2009-05-17 11:45:45 -07:00
romfs	ROMFS: romfs_dev_read() error ignored	2009-05-09 10:49:41 -04:00
smbfs	constify dentry_operations: misc filesystems	2009-03-27 14:44:00 -04:00
squashfs	Squashfs: cody tidying, remove commented out line in Makefile	2009-05-13 03:25:20 +01:00
sysfs	sysfs: file.c: use create_singlethread_workqueue()	2009-05-28 14:24:07 -07:00
sysv	fs/sysv: return f_fsid for statfs(2)	2009-04-02 19:05:10 -07:00
ubifs	Convert obvious places to deactivate_locked_super()	2009-05-09 10:49:40 -04:00
udf	udf: Don't write integrity descriptor too often	2009-04-02 13:36:28 +02:00
ufs	switch ufs directories to ufs_sync_file()	2009-05-09 10:49:42 -04:00
xfs	Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs	2009-06-02 09:47:21 -07:00
Kconfig	nilfs2: update makefile and Kconfig	2009-04-07 08:31:16 -07:00
Kconfig.binfmt	CORE_DUMP_DEFAULT_ELF_HEADERS depends on ELF_CORE	2009-01-09 16:54:41 -08:00
Makefile	nilfs2: update makefile and Kconfig	2009-04-07 08:31:16 -07:00
aio.c	aio: lookup_ioctx can return the wrong value when looking up a bogus context	2009-03-19 15:57:18 -07:00
anon_inodes.c	constify dentry_operations: rest	2009-03-27 14:44:03 -04:00
attr.c	vfs: Use lowercase names of quota functions	2009-03-26 02:18:35 +01:00
bad_inode.c	kill ->dir_notify()	2008-12-31 18:07:43 -05:00
binfmt_aout.c	sanitize ifdefs in binfmt_aout	2009-01-03 11:45:54 -08:00
binfmt_elf.c	Trim includes in binfmt_elf	2009-03-31 23:00:27 -04:00
binfmt_elf_fdpic.c	ptrace: s/parent/real_parent/ in binfmt_elf_fdpic.c	2009-05-02 15:36:10 -07:00
binfmt_em86.c	…
binfmt_flat.c	flat: fix data sections alignment	2009-05-29 08:40:02 -07:00
binfmt_misc.c	fs/binfmt_misc.c: add terminating newline to /proc/sys/fs/binfmt_misc/status	2009-01-06 15:59:19 -08:00
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: add private bio_set for bio integrity allocations	2009-03-24 12:35:17 +01:00
bio.c	bio: fix memcpy corruption in bio_copy_user_iov()	2009-04-28 20:24:29 +02:00
block_dev.c	Cleanup after commit 585d3bc06f	2009-04-01 07:07:16 -04:00
buffer.c	Fix nobh_truncate_page() to not pass stack garbage to get_block()	2009-06-06 06:17:25 -04:00
char_dev.c	fs: fix name overwrite in __register_chrdev_region()	2009-01-06 15:59:13 -08:00
compat.c	do_execve() must not clear fs->in_exec if it was set by another thread	2009-04-24 07:39:45 -07:00
compat_binfmt_elf.c	…
compat_ioctl.c	fs/compat_ioctl: fix build when !BLOCK	2009-04-20 23:01:16 -04:00
dcache.c	fs: dcache fix LRU ordering	2009-05-09 10:49:40 -04:00
dcookies.c	[CVE-2009-0029] System call wrapper special cases	2009-01-14 14:15:18 +01:00
direct-io.c	dio: Remove code handling bio_alloc failure with __GFP_WAIT	2009-04-15 12:10:13 +02:00
drop_caches.c	vfs: skip I_CLEAR state inodes	2009-04-02 19:04:48 -07:00
eventfd.c	epoll keyed wakeups: make eventfd use keyed wakeups	2009-04-01 08:59:20 -07:00
eventpoll.c	epoll: fix size check in epoll_create()	2009-05-12 14:11:35 -07:00
exec.c	Switch open_exec() and sys_uselib() to do_open_filp()	2009-05-09 10:49:42 -04:00
fcntl.c	dup2: Fix return value with oldfd == newfd and invalid fd	2009-05-11 12:18:06 -07:00
fifo.c	[PATCH] introduce fmode_t, do annotations	2008-10-21 07:47:06 -04:00
file.c	…
file_table.c	trivial: remove unused variable 'path' in alloc_file()	2009-03-30 15:22:03 +02:00
filesystems.c	fs: Mark get_filesystem_list() as __init function.	2009-04-20 23:02:52 -04:00
fs-writeback.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-04-03 15:24:35 -07:00
fs_struct.c	Get rid of indirect include of fs_struct.h	2009-03-31 23:00:27 -04:00
generic_acl.c	New helper - current_umask()	2009-03-31 23:00:26 -04:00
inode.c	integrity: fix IMA inode leak	2009-06-06 14:33:41 -07:00
internal.h	New locking/refcounting for fs_struct	2009-03-31 23:00:26 -04:00
ioctl.c	fiemap: fix problem with setting FIEMAP_EXTENT_LAST	2009-05-06 16:36:09 -07:00
ioprio.c	[CVE-2009-0029] System call wrappers part 28	2009-01-14 14:15:30 +01:00
libfs.c	Convert obvious places to deactivate_locked_super()	2009-05-09 10:49:40 -04:00
locks.c	[CVE-2009-0029] System call wrappers part 16	2009-01-14 14:15:25 +01:00
mbcache.c	…
mpage.c	Remove two unneeded exports and make two symbols static in fs/mpage.c	2009-04-01 07:38:54 -04:00
namei.c	Switch open_exec() and sys_uselib() to do_open_filp()	2009-05-09 10:49:42 -04:00
namespace.c	Fix races around the access to ->s_options	2009-05-09 10:51:34 -04:00
nfsctl.c	[CVE-2009-0029] System call wrappers part 27	2009-01-14 14:15:29 +01:00
no-block.c	…
open.c	Switch open_exec() and sys_uselib() to do_open_filp()	2009-05-09 10:49:42 -04:00
pipe.c	splice: add helpers for locking pipe inode	2009-04-15 12:10:12 +02:00
pnode.c	…
pnode.h	…
posix_acl.c	CRED: Wrap task credential accesses in the filesystem subsystem	2008-11-14 10:39:05 +11:00
read_write.c	Make non-compat preadv/pwritev use native register size	2009-04-04 14:20:34 -07:00
read_write.h	…
readdir.c	[CVE-2009-0029] System call wrappers part 32	2009-01-14 14:15:31 +01:00
select.c	[CVE-2009-0029] System call wrappers part 32	2009-01-14 14:15:31 +01:00
seq_file.c	cpumask: fix seq_bitmap_*() functions.	2009-03-30 22:05:11 +10:30
signalfd.c	[CVE-2009-0029] System call wrappers part 31	2009-01-14 14:15:31 +01:00
splice.c	splice: fix new kernel-doc warnings	2009-04-17 07:38:07 -07:00
stack.c	…
stat.c	kill vfs_stat_fd / vfs_lstat_fd	2009-04-20 23:02:52 -04:00
super.c	NULL noise in fs/super.c:kill_bdev_super()	2009-05-09 10:49:41 -04:00
sync.c	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-quota-2.6	2009-03-27 14:48:34 -07:00
timerfd.c	timerfd: add flags check	2009-02-18 15:37:53 -08:00
utimes.c	[CVE-2009-0029] System call wrappers part 30	2009-01-14 14:15:30 +01:00
xattr.c	xattr: use memdup_user()	2009-04-20 23:02:50 -04:00
xattr_acl.c	…