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Eric Dumazet f991bd2e14 fs: introduce a per-cpu last_ino allocator 
new_inode() dirties a contended cache line to get increasing
inode numbers. This limits performance on workloads that cause
significant parallel inode allocation.

Solve this problem by using a per_cpu variable fed by the shared
last_ino in batches of 1024 allocations.  This reduces contention on
the shared last_ino, and give same spreading ino numbers than before
(i.e. same wraparound after 2^32 allocations).

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 		2010-10-25 21:26:11 -04:00
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9p new helper: ihold() 2010-10-25 21:26:11 -04:00
adfs Merge branch 'vfs' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl 2010-10-22 10:52:01 -07:00
affs new helper: ihold() 2010-10-25 21:26:11 -04:00
afs new helper: ihold() 2010-10-25 21:26:11 -04:00
autofs Merge branch 'vfs' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl 2010-10-22 10:52:01 -07:00
autofs4 Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl 2010-10-22 10:52:56 -07:00
befs
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bfs new helper: ihold() 2010-10-25 21:26:11 -04:00
btrfs new helper: ihold() 2010-10-25 21:26:11 -04:00
cachefiles llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
ceph ceph: do not carry i_lock for readdir from dcache 2010-10-20 15:38:27 -07:00
cifs Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6 2010-10-22 17:52:29 -07:00
coda new helper: ihold() 2010-10-25 21:26:11 -04:00
configfs
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cramfs cramfs: only unlock new inodes 2010-08-18 01:01:33 -04:00
debugfs llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
devpts
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dlm Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm 2010-10-22 17:33:16 -07:00
ecryptfs Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
efs
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exofs new helper: ihold() 2010-10-25 21:26:11 -04:00
exportfs
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ext2 new helper: ihold() 2010-10-25 21:26:11 -04:00
ext3 new helper: ihold() 2010-10-25 21:26:11 -04:00
ext4 new helper: ihold() 2010-10-25 21:26:11 -04:00
fat Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block 2010-10-22 17:07:18 -07:00
freevxfs BKL: remove BKL from freevxfs 2010-10-21 18:48:09 +02:00
fscache Add a dummy printk function for the maintenance of unused printks 2010-08-12 09:51:35 -07:00
fuse Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl 2010-10-22 10:52:56 -07:00
gfs2 new helper: ihold() 2010-10-25 21:26:11 -04:00
hfs switch hfs to hlist_add_fake() 2010-10-25 21:24:16 -04:00
hfsplus new helper: ihold() 2010-10-25 21:26:11 -04:00
hostfs hostfs: fix UML crash: remove f_spare from hostfs 2010-10-25 21:18:21 -04:00
hpfs Merge branch 'vfs' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl 2010-10-22 10:52:01 -07:00
hppfs llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
hugetlbfs llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
isofs isofs: Fix isofs_get_blocks for 8TB files 2010-10-25 21:18:20 -04:00
jbd Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block 2010-10-22 17:07:18 -07:00
jbd2 Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block 2010-10-22 17:07:18 -07:00
jffs2 new helper: ihold() 2010-10-25 21:26:11 -04:00
jfs new helper: ihold() 2010-10-25 21:26:11 -04:00
lockd
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logfs new helper: ihold() 2010-10-25 21:26:11 -04:00
minix new helper: ihold() 2010-10-25 21:26:11 -04:00
ncpfs ncpfs: Lock socket in ncpfs while setting its callbacks 2010-10-05 11:02:14 +02:00
nfs new helper: ihold() 2010-10-25 21:26:11 -04:00
nfs_common
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nfsd fs: add sync_inode_metadata 2010-10-25 21:18:19 -04:00
nilfs2 new helper: ihold() 2010-10-25 21:26:11 -04:00
nls
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notify Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl 2010-10-22 10:52:56 -07:00
ntfs new helper: ihold() 2010-10-25 21:26:11 -04:00
ocfs2 new helper: ihold() 2010-10-25 21:26:11 -04:00
omfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bcopeland/omfs 2010-08-10 11:47:36 -07:00
openpromfs
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partitions Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block 2010-10-25 07:45:10 -07:00
proc vfs: introduce FMODE_UNSIGNED_OFFSET for allowing negative f_pos 2010-10-25 21:18:21 -04:00
qnx4 BKL: remove BKL from qnx4 2010-10-21 18:48:04 +02:00
quota Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2010-08-10 11:26:52 -07:00
ramfs check ATTR_SIZE contraints in inode_change_ok 2010-08-09 16:47:39 -04:00
reiserfs new helper: ihold() 2010-10-25 21:26:11 -04:00
romfs llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
smbfs smbfs never retains inodes with zero refcount in the first place 2010-10-25 21:23:01 -04:00
squashfs Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl 2010-10-22 10:52:56 -07:00
sysfs Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2010-10-22 19:36:42 -07:00
sysv new helper: ihold() 2010-10-25 21:26:11 -04:00
ubifs new helper: ihold() 2010-10-25 21:26:11 -04:00
udf new helper: ihold() 2010-10-25 21:26:11 -04:00
ufs new helper: ihold() 2010-10-25 21:26:11 -04:00
xfs new helper: ihold() 2010-10-25 21:26:11 -04:00
Kconfig fs: move exportfs since it is not a networking filesystem 2010-10-25 21:18:22 -04:00
Kconfig.binfmt
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Makefile
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aio.c new helper: ihold() 2010-10-25 21:26:11 -04:00
anon_inodes.c new helper: ihold() 2010-10-25 21:26:11 -04:00
attr.c check ATTR_SIZE contraints in inode_change_ok 2010-08-09 16:47:39 -04:00
bad_inode.c bkl: Remove locked .ioctl file operation 2010-08-14 00:24:24 +02:00
binfmt_aout.c Don't dump task struct in a.out core-dumps 2010-10-14 10:57:40 -07:00
binfmt_elf.c ARM: 6342/1: fix ASLR of PIE executables 2010-10-08 10:02:53 +01:00
binfmt_elf_fdpic.c
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binfmt_em86.c
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binfmt_flat.c
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binfmt_misc.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
binfmt_script.c Make do_execve() take a const filename pointer 2010-08-17 18:07:43 -07:00
binfmt_som.c
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bio-integrity.c fs/bio-integrity.c: return -ENOMEM on kmalloc failure 2010-08-23 13:36:59 +02:00
bio.c block: unify flags for struct bio and struct request 2010-08-07 18:20:39 +02:00
block_dev.c new helper: ihold() 2010-10-25 21:26:11 -04:00
buffer.c fs/buffer.c: call __block_write_begin() if we have page 2010-10-25 21:18:23 -04:00
char_dev.c Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl 2010-10-22 10:52:56 -07:00
compat.c Prevent freeing uninitialized pointer in compat_do_readv_writev 2010-09-22 17:22:38 -07:00
compat_binfmt_elf.c
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compat_ioctl.c fix rawctl compat ioctls breakage on amd64 and itanic 2010-10-19 11:29:54 +02:00
dcache.c fs: brlock vfsmount_lock 2010-08-18 08:35:48 -04:00
dcookies.c
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direct-io.c O_DIRECT: fix the splitting up of contiguous I/O 2010-09-09 18:57:22 -07:00
drop_caches.c simplify checks for I_CLEAR/I_FREEING 2010-08-09 16:47:44 -04:00
eventfd.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
eventpoll.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
exec.c Export dump_{write,seek} to binary loader modules 2010-10-14 19:15:28 -07:00
fcntl.c vfs: take O_NONBLOCK out of the O_* uniqueness test 2010-09-09 18:57:25 -07:00
fifo.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
file.c vfs: use kmalloc() to allocate fdmem if possible 2010-08-11 08:59:02 -07:00
file_table.c fs: allow for more than 2^31 files 2010-10-25 21:18:20 -04:00
filesystems.c
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fs-writeback.c fs: Implement lazy LRU updates for inodes 2010-10-25 21:26:09 -04:00
fs_struct.c fs: fs_struct rwlock to spinlock 2010-08-18 08:35:46 -04:00
generic_acl.c vfs: update ctime when changing the file's permission by setfacl 2010-08-18 01:04:22 -04:00
inode.c fs: introduce a per-cpu last_ino allocator 2010-10-25 21:26:11 -04:00
internal.h fs: Convert nr_inodes and nr_unused to per-cpu counters 2010-10-25 21:26:09 -04:00
ioctl.c bkl: Remove locked .ioctl file operation 2010-08-14 00:24:24 +02:00
ioprio.c
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libfs.c new helper: ihold() 2010-10-25 21:26:11 -04:00
locks.c fs/locks.c: prepare for BKL removal 2010-10-05 11:02:04 +02:00
mbcache.c mbcache: Limit the maximum number of cache entries 2010-08-18 06:24:41 -04:00
mpage.c
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namei.c new helper: ihold() 2010-10-25 21:26:11 -04:00
namespace.c vfs: fix infinite loop caused by clone_mnt race 2010-10-25 21:24:16 -04:00
nfsctl.c
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no-block.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
open.c fs: cleanup files_lock locking 2010-08-18 08:35:47 -04:00
pipe.c pipe: fix failure to return error code on ->confirm() 2010-10-21 14:56:33 +02:00
pnode.c fs: brlock vfsmount_lock 2010-08-18 08:35:48 -04:00
pnode.h
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posix_acl.c
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read_write.c vfs: introduce FMODE_UNSIGNED_OFFSET for allowing negative f_pos 2010-10-25 21:18:21 -04:00
read_write.h
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readdir.c vfs: fix warning: 'dirent' is used uninitialized in this function 2010-08-09 20:45:05 -07:00
select.c
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seq_file.c fs/seq_file.c: Remove unnecessary casts of private_data 2010-09-23 13:28:23 +02:00
signalfd.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
splice.c splice: fix misuse of SPLICE_F_NONBLOCK 2010-08-07 18:52:56 +02:00
stack.c
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stat.c Mark arguments to certain syscalls as being const 2010-08-13 16:53:13 -07:00
statfs.c add f_flags to struct statfs(64) 2010-08-09 16:48:44 -04:00
super.c fs: scale files_lock 2010-08-18 08:35:48 -04:00
sync.c get rid of file_fsync() 2010-08-09 16:47:43 -04:00
timerfd.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
utimes.c Mark arguments to certain syscalls as being const 2010-08-13 16:53:13 -07:00
xattr.c
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xattr_acl.c
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