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Miklos Szeredi d12def1bcb fuse: limit queued background requests 
Libfuse basically creates a new thread for each new request.  This is fine for
synchronous requests, which are naturally limited.  However background
requests (especially writepage) can cause a thread creation storm.

To avoid this, limit the number of background requests available to userspace.

This is done by introducing another queue for background requests, and a
counter for the number of "active" requests, which are currently available for
userspace.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06 10:41:13 -08:00
..
9p
9p: use copy of the options value instead of original
2007-11-06 08:02:53 -06:00
adfs
…
affs
…
afs
vfs: Add 64 bit i_version support
2008-01-28 23:58:27 -05:00
autofs
Use task_pid_nr() instead of pid_nr(task_pid())
2007-10-19 11:53:43 -07:00
autofs4
pid namespaces: round up the API
2007-10-19 11:53:37 -07:00
befs
fs/: Spelling fixes
2008-02-03 17:33:42 +02:00
bfs
regression: bfs endianness bug
2007-12-05 09:25:20 -08:00
cifs
Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user
2008-02-05 09:44:13 -08:00
coda
coda: convert struct class_device to struct device
2008-01-24 20:40:05 -08:00
configfs
configfs: file.c fix possible recursive locking
2008-01-25 15:05:47 -08:00
cramfs
fs/cramfs/inode.c: replace hardcoded value with preprocessor constant
2007-10-18 14:37:29 -07:00
debugfs
Kobject: convert fs/* from kobject_unregister() to kobject_put()
2008-01-24 20:40:40 -08:00
devpts
…
dlm
dlm: static initialization improvements
2008-01-30 11:04:43 -06:00
ecryptfs
ecryptfs: check for existing key_tfm at mount time
2008-02-06 10:41:13 -08:00
efs
exportfs: make struct export_operations const
2007-10-22 08:13:21 -07:00
exportfs
exportfs: update documentation
2007-10-22 08:13:21 -07:00
ext2
ext2: xip check fix
2008-02-06 10:41:08 -08:00
ext3
Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user
2008-02-05 09:44:13 -08:00
ext4
Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user
2008-02-05 09:44:13 -08:00
fat
FAT: Fix printk format strings
2008-02-06 10:41:02 -08:00
freevxfs
fs/: Spelling fixes
2008-02-03 17:33:42 +02:00
fuse
fuse: limit queued background requests
2008-02-06 10:41:13 -08:00
gfs2
Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user
2008-02-05 09:44:13 -08:00
hfs
hfs: update comment to reflect actual init and exit routines
2008-02-06 10:41:05 -08:00
hfsplus
…
hostfs
uml: fix hostfs tv_usec calculations
2008-02-05 09:44:30 -08:00
hpfs
…
hppfs
…
hugetlbfs
hugetlb: allow sticky directory mount option
2008-02-05 09:44:14 -08:00
isofs
exportfs: make struct export_operations const
2007-10-22 08:13:21 -07:00
jbd
spinlock: lockbreak cleanup
2008-01-30 13:31:20 +01:00
jbd2
spinlock: lockbreak cleanup
2008-01-30 13:31:20 +01:00
jffs2
Typoes: "whith" -> "with"
2008-02-03 15:14:02 +02:00
jfs
Spelling fixes: lenght->length
2008-02-03 15:42:53 +02:00
lockd
NLM: tear down RPC clients in nlm_shutdown_hosts
2008-02-01 16:42:15 -05:00
minix
…
msdos
…
ncpfs
NCPFS: update diagnostic strings to match routine names.
2008-02-06 10:41:05 -08:00
nfs
Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user
2008-02-05 09:44:13 -08:00
nfs_common
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nfsd
Add 64-bit capability support to the kernel
2008-02-05 09:44:20 -08:00
nls
sparse pointer use of zero as null
2007-10-18 14:37:31 -07:00
ntfs
is_vmalloc_addr(): Check if an address is within the vmalloc boundaries
2008-02-05 09:44:14 -08:00
ocfs2
Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user
2008-02-05 09:44:13 -08:00
openpromfs
[SPARC]: Constify function pointer tables.
2008-01-22 18:29:20 -08:00
partitions
partition: use DEFAULT_SGI_PARTITION for SGI_PARTION default
2008-02-06 10:41:08 -08:00
proc
proc: loadavg reading race
2008-02-06 10:41:04 -08:00
qnx4
…
ramfs
…
reiserfs
fs/reiserfs/xattr.c: use LIST_HEAD instead of LIST_HEAD_INIT
2008-02-06 10:41:08 -08:00
romfs
…
smbfs
smbfs: fix calculation of kernel_recvmsg size parameter in smb_receive()
2008-02-06 10:41:02 -08:00
sysfs
Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
2008-01-25 17:19:08 -08:00
sysv
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udf
…
ufs
ufs: fix nexstep dir block size
2007-12-05 09:21:18 -08:00
vfat
…
xfs
is_vmalloc_addr(): Check if an address is within the vmalloc boundaries
2008-02-05 09:44:14 -08:00
aio.c
core: remove last users of empty FASTCALL macro
2008-01-30 13:31:17 +01:00
anon_inodes.c
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attr.c
VFS: make notify_change pass ATTR_KILL_S*ID to setattr operations
2007-10-18 14:37:22 -07:00
bad_inode.c
…
binfmt_aout.c
mm: fix exit_mmap BUG() on a.out binary exit
2007-12-20 07:49:53 -08:00
binfmt_elf_fdpic.c
pid namespaces: changes to show virtual ids to user
2007-10-19 11:53:40 -07:00
binfmt_elf.c
fs/binfmt_elf.c: spello fix
2008-02-03 18:05:15 +02:00
binfmt_em86.c
Convert files to UTF-8 and some cleanups
2007-10-19 23:21:04 +02:00
binfmt_flat.c
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binfmt_misc.c
Convert files to UTF-8 and some cleanups
2007-10-19 23:21:04 +02:00
binfmt_script.c
Convert files to UTF-8 and some cleanups
2007-10-19 23:21:04 +02:00
binfmt_som.c
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bio.c
__bio_clone: don't calculate hw/phys segment counts
2008-01-28 10:04:46 +01:00
block_dev.c
kill an unused PTR_ERR in bdev_cache_init()
2008-02-06 10:41:06 -08:00
buffer.c
bufferhead: revert constructor removal
2008-02-05 09:44:14 -08:00
char_dev.c
Kobject: rename kobject_init_ng() to kobject_init()
2008-01-24 20:40:38 -08:00
compat_binfmt_elf.c
x86: compat_binfmt_elf
2008-01-30 13:31:46 +01:00
compat_ioctl.c
remove __attribute_used__
2008-01-28 23:21:18 +01:00
compat.c
fs: remove dead config CONFIG_HAS_COMPAT_EPOLL_EVENT symbol
2008-02-06 10:41:03 -08:00
dcache.c
inotify: remove debug code
2008-02-06 10:41:07 -08:00
dcookies.c
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direct-io.c
Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user
2008-02-05 09:44:13 -08:00
dnotify.c
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dquot.c
quota: improve inode list scanning in add_dquot_ref()
2008-02-06 10:41:07 -08:00
drop_caches.c
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eventfd.c
fs/eventfd.c should #include <linux/syscalls.h>
2008-02-06 10:41:03 -08:00
eventpoll.c
lockdep: annotate epoll
2008-02-05 09:44:07 -08:00
exec.c
exec: rework the group exit and fix the race with kill
2008-02-05 09:44:07 -08:00
fcntl.c
pid namespaces: changes to show virtual ids to user
2007-10-19 11:53:40 -07:00
fifo.c
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file_table.c
fs/file_table.c: use list_for_each_entry() instead of list_for_each()
2007-10-19 11:53:38 -07:00
file.c
get rid of NR_OPEN and introduce a sysctl_nr_open
2008-02-06 10:41:06 -08:00
filesystems.c
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fs-writeback.c
fs: use list_for_each_entry_reverse and kill sb_entry
2008-02-06 10:41:05 -08:00
generic_acl.c
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inode.c
ext4: Add inode version support in ext4
2008-01-28 23:58:27 -05:00
inotify_user.c
SIGIO-driven I/O with inotify queues
2008-02-06 10:41:00 -08:00
inotify.c
inotify: remove debug code
2008-02-06 10:41:07 -08:00
internal.h
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ioctl.c
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ioprio.c
cfq-iosched: relax IOPRIO_CLASS_IDLE restrictions
2008-01-28 11:38:15 +01:00
Kconfig
deprecate smbfs in favour of cifs
2008-02-05 14:37:15 -08:00
Kconfig.binfmt
x86: compat_binfmt_elf Kconfig
2008-01-30 13:31:46 +01:00
libfs.c
Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user
2008-02-05 09:44:13 -08:00
locks.c
pid-namespaces-vs-locks-interaction
2008-02-03 17:51:36 -05:00
Makefile
x86: compat_binfmt_elf Kconfig
2008-01-30 13:31:46 +01:00
mbcache.c
fs: Fix to correct the mbcache entries counter
2007-10-25 15:18:29 -07:00
mpage.c
Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user
2008-02-05 09:44:13 -08:00
namei.c
inotify: send IN_ATTRIB events when link count changes
2008-02-06 10:41:05 -08:00
namespace.c
Use ilog2() in fs/namespace.c
2008-02-06 10:41:09 -08:00
nfsctl.c
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no-block.c
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open.c
mark sys_open/sys_read exports unused
2007-11-14 18:45:42 -08:00
pipe.c
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pnode.c
MNT_UNBINDABLE fix
2008-02-06 10:41:02 -08:00
pnode.h
[PATCH] new helpers - collect_mounts() and release_collected_mounts()
2007-10-21 02:37:25 -04:00
posix_acl.c
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quota_v1.c
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quota_v2.c
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quota.c
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read_write.c
ext4: export iov_shorten from kernel for ext4's use
2008-01-28 23:58:27 -05:00
read_write.h
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readdir.c
Use mutex_lock_killable in vfs_readdir
2007-12-06 17:39:54 -05:00
select.c
make sys_poll() wait at least timeout ms
2008-02-06 10:41:09 -08:00
seq_file.c
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signalfd.c
fs/signalfd.c should #include <linux/syscalls.h>
2008-02-06 10:41:03 -08:00
splice.c
splice: always updated atime in direct splice
2008-02-01 09:26:32 +01:00
stack.c
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stat.c
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super.c
Convert files to UTF-8 and some cleanups
2007-10-19 23:21:04 +02:00
sync.c
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timerfd.c
timerfd: new timerfd API
2008-02-05 09:44:07 -08:00
utimes.c
fs/utimes.c should #include <linux/syscalls.h>
2008-02-06 10:41:03 -08:00
xattr_acl.c
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xattr.c
VFS: Reorder vfs_getxattr to avoid unnecessary calls to the LSM
2008-02-05 09:44:20 -08:00