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Eric Dumazet 989a297920 fasync: RCU and fine grained locking 
kill_fasync() uses a central rwlock, candidate for RCU conversion, to
avoid cache line ping pongs on SMP.

fasync_remove_entry() and fasync_add_entry() can disable IRQS on a short
section instead during whole list scan.

Use a spinlock per fasync_struct to synchronize kill_fasync_rcu() and
fasync_{remove|add}_entry(). This spinlock is IRQ safe, so sock_fasync()
doesnt need its own implementation and can use fasync_helper(), to
reduce code size and complexity.

We can remove __kill_fasync() direct use in net/socket.c, and rename it
to kill_fasync_rcu().

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-21 16:19:29 -07:00
..
9p
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
2010-04-05 13:42:54 -07:00
adfs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
affs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
afs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
autofs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
autofs4
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
befs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
bfs
pass writeback_control to ->write_inode
2010-03-05 13:25:52 -05:00
btrfs
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
2010-04-12 18:37:04 -07:00
cachefiles
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
ceph
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
2010-04-14 18:45:31 -07:00
cifs
Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6
2010-04-08 11:58:14 -07:00
coda
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
configfs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
cramfs
…
debugfs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
devpts
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
dlm
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
ecryptfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ecryptfs/ecryptfs-2.6
2010-04-19 14:20:32 -07:00
efs
…
exofs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
exportfs
nfs: new subdir Documentation/filesystems/nfs
2009-10-27 19:34:04 -04:00
ext2
ext2: symlink must be handled via filesystem specific operation
2010-04-12 21:11:25 +02:00
ext3
ext3: symlink must be handled via filesystem specific operation
2010-04-12 21:11:39 +02:00
ext4
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
fat
Merge branch 'master' into export-slabh
2010-04-05 11:37:28 +09:00
freevxfs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
fscache
fs-cache: order the debugfs stats correctly
2010-04-07 08:38:05 -07:00
fuse
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
gfs2
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
hfs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
hfsplus
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
hostfs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
hpfs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
hppfs
hppfs can use existing proc_mnt, no need for do_kern_mount() in there
2010-03-03 14:08:00 -05:00
hugetlbfs
Untangling ima mess, part 1: alloc_file()
2009-12-16 12:16:47 -05:00
isofs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
jbd
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
jbd2
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
jffs2
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
jfs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
lockd
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
logfs
Merge branch 'master' into export-slabh
2010-04-05 11:37:28 +09:00
minix
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
ncpfs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
nfs
NFSv4: fix delegated locking
2010-04-12 07:55:15 -04:00
nfs_common
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
nfsd
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
nilfs2
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2
2010-04-12 18:34:25 -07:00
nls
…
notify
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
ntfs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
ocfs2
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
omfs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
openpromfs
…
partitions
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
proc
pagemap: fix pfn calculation for hugepage
2010-04-07 08:38:04 -07:00
qnx4
fs/qnx4: decrement sizeof size in strncmp
2010-02-04 11:55:46 +01:00
quota
quota: Convert __DQUOT_PARANOIA symbol to standard config option
2010-04-20 18:25:25 +02:00
ramfs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
reiserfs
Merge branch 'master' into export-slabh
2010-04-05 11:37:28 +09:00
romfs
fix leak in romfs_fill_super()
2010-01-26 22:22:26 -05:00
smbfs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
squashfs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
sysfs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
sysv
pass writeback_control to ->write_inode
2010-03-05 13:25:52 -05:00
ubifs
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
udf
udf: add speciffic ->setattr callback
2010-04-08 15:35:20 +02:00
ufs
ufs: make solaris fsck happy
2010-03-12 15:52:35 -08:00
xfs
xfs: don't warn on EAGAIN in inode reclaim
2010-04-16 13:51:44 -05:00
aio.c
aio: remove unused field
2009-12-16 07:20:13 -08:00
anon_inodes.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
attr.c
fs: use rlimit helpers
2010-03-06 11:26:29 -08:00
bad_inode.c
…
binfmt_aout.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
binfmt_elf_fdpic.c
FDPIC: For-loop in elf_core_vma_data_size() is incorrect
2010-03-24 16:43:29 -07:00
binfmt_elf.c
coredump: pass mm->flags as a coredump parameter for consistency
2010-03-06 11:26:46 -08:00
binfmt_em86.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
binfmt_flat.c
fs: use rlimit helpers
2010-03-06 11:26:29 -08:00
binfmt_misc.c
…
binfmt_script.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
binfmt_som.c
Split 'flush_old_exec' into two functions
2010-01-29 08:22:01 -08:00
bio-integrity.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
bio.c
Merge branch 'master' into for-linus
2010-03-19 08:05:10 +01:00
block_dev.c
vfs: rename block_fsync() to blkdev_fsync()
2010-04-07 08:38:04 -07:00
buffer.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2010-03-12 16:04:50 -08:00
char_dev.c
…
compat_binfmt_elf.c
elf coredump: replace ELF_CORE_EXTRA_* macros by functions
2010-03-06 11:26:45 -08:00
compat_ioctl.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
compat.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
dcache.c
fix race in d_splice_alias()
2010-03-03 14:13:08 -05:00
dcookies.c
…
direct-io.c
dio: fix use-after-free
2009-12-17 04:52:13 -05:00
drop_caches.c
…
eventfd.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
eventpoll.c
anonfd: Allow making anon files read-only
2009-12-22 12:27:34 -05:00
exec.c
coredump: suppress uid comparison test if core output files are pipes
2010-03-06 11:26:46 -08:00
fcntl.c
fasync: RCU and fine grained locking
2010-04-21 16:19:29 -07:00
fifo.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
file_table.c
vfs: take f_lock on modifying f_mode after open time
2010-03-06 11:26:25 -08:00
file.c
fs: use rlimit helpers
2010-03-06 11:26:29 -08:00
filesystems.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
fs_struct.c
…
fs-writeback.c
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
2010-04-09 11:50:29 -07:00
generic_acl.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
inode.c
dquot: move dquot initialization responsibility into the filesystem
2010-03-05 00:20:30 +01:00
internal.h
Take vfsmount_lock to fs/internal.h
2010-03-03 14:07:59 -05:00
ioctl.c
__generic_block_fiemap(): fix for files bigger than 4GB
2009-11-12 07:26:01 -08:00
ioprio.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
Kconfig
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
2010-03-19 09:43:06 -07:00
Kconfig.binfmt
…
libfs.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
locks.c
Merge branch 'for-next' into for-linus
2010-03-08 16:55:37 +01:00
Makefile
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
2010-03-19 09:43:06 -07:00
mbcache.c
…
mpage.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
namei.c
Restore LOOKUP_DIRECTORY hint handling in final lookup on open()
2010-03-26 12:41:05 -04:00
namespace.c
vfs: add NOFOLLOW flag to umount(2)
2010-03-03 14:08:00 -05:00
nfsctl.c
Switch may_open() and break_lease() to passing O_...
2010-03-03 13:00:21 -05:00
no-block.c
…
open.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
pipe.c
fs: no games with DCACHE_UNHASHED
2009-12-17 10:51:40 -05:00
pnode.c
Kill CL_PROPAGATION, sanitize fs/pnode.c:get_source()
2010-03-03 13:00:22 -05:00
pnode.h
VFS: Clean up shared mount flag propagation
2010-03-03 14:07:55 -05:00
posix_acl.c
…
read_write.c
do_sync_read/write() should set kiocb.ki_nbytes to be consistent
2010-03-24 16:43:29 -07:00
read_write.h
…
readdir.c
…
select.c
Add generic sys_old_select()
2010-03-12 15:52:32 -08:00
seq_file.c
seq_file: fix new kernel-doc warnings
2010-03-07 15:48:26 -08:00
signalfd.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
splice.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
stack.c
VFS/fsstack: handle 32-bit smp + preempt + large files in fsstack_copy_inode_size
2009-12-17 10:58:17 -05:00
stat.c
Add unlocked version of inode_add_bytes() function
2009-12-23 13:33:54 +01:00
super.c
Mirror MS_KERNMOUNT in ->mnt_flags
2010-03-03 14:08:00 -05:00
sync.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
timerfd.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
utimes.c
…
xattr_acl.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
xattr.c
sanitize xattr handler prototypes
2009-12-16 12:16:49 -05:00