redonkable/remarkable-linux
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Eric Dumazet 179f7ebff6 percpu_counter: FBC_BATCH should be a variable 
For NR_CPUS >= 16 values, FBC_BATCH is 2*NR_CPUS

Considering more and more distros are using high NR_CPUS values, it makes
sense to use a more sensible value for FBC_BATCH, and get rid of NR_CPUS.

A sensible value is 2*num_online_cpus(), with a minimum value of 32 (This
minimum value helps branch prediction in __percpu_counter_add())

We already have a hotcpu notifier, so we can adjust FBC_BATCH dynamically.

We rename FBC_BATCH to percpu_counter_batch since its not a constant
anymore.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-06 15:59:13 -08:00
..
9p
adfs
affs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2009-01-05 18:32:06 -08:00
afs fs: symlink write_begin allocation context fix 2009-01-04 13:33:20 -08:00
autofs zero i_uid/i_gid on inode allocation 2009-01-05 11:54:28 -05:00
autofs4 zero i_uid/i_gid on inode allocation 2009-01-05 11:54:28 -05:00
befs
bfs
cifs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2009-01-05 18:32:06 -08:00
coda add a vfs_fsync helper 2009-01-05 11:54:28 -05:00
configfs zero i_uid/i_gid on inode allocation 2009-01-05 11:54:28 -05:00
cramfs zero i_uid/i_gid on inode allocation 2009-01-05 11:54:28 -05:00
debugfs zero i_uid/i_gid on inode allocation 2009-01-05 11:54:28 -05:00
devpts zero i_uid/i_gid on inode allocation 2009-01-05 11:54:28 -05:00
dlm Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm 2009-01-05 19:02:09 -08:00
ecryptfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2009-01-05 18:32:06 -08:00
efs
exportfs
ext2
ext3 ext3: Add default allocation routines for quota structures 2009-01-05 08:40:25 -08:00
ext4 percpu_counter: FBC_BATCH should be a variable 2009-01-06 15:59:13 -08:00
fat
freevxfs
fuse fs: symlink write_begin allocation context fix 2009-01-04 13:33:20 -08:00
gfs2 GFS2: Use DEFINE_SPINLOCK 2009-01-05 07:45:02 +00:00
hfs
hfsplus
hostfs fs: symlink write_begin allocation context fix 2009-01-04 13:33:20 -08:00
hpfs
hppfs
hugetlbfs hugetlb: unsigned ret cannot be negative 2009-01-06 15:59:08 -08:00
isofs isofs check for NULL ->i_op in root directory is dead code 2009-01-05 11:53:38 -05:00
jbd
jbd2 jbd2: Add buffer triggers 2009-01-05 08:40:30 -08:00
jffs2 fs: symlink write_begin allocation context fix 2009-01-04 13:33:20 -08:00
jfs fix the treatment of jfs special inodes 2009-01-05 11:54:29 -05:00
lockd
minix
ncpfs
nfs fs: symlink write_begin allocation context fix 2009-01-04 13:33:20 -08:00
nfs_common
nfsd add a vfs_fsync helper 2009-01-05 11:54:28 -05:00
nls
notify inotify: fix type errors in interfaces 2009-01-05 11:54:29 -05:00
ntfs ntfs: don't NULL i_op 2009-01-05 11:54:27 -05:00
ocfs2 Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2 2009-01-05 18:32:43 -08:00
omfs zero i_uid/i_gid on inode allocation 2009-01-05 11:54:28 -05:00
openpromfs zero i_uid/i_gid on inode allocation 2009-01-05 11:54:28 -05:00
partitions
proc mm: report the MMU pagesize in /proc/pid/smaps 2009-01-06 15:58:58 -08:00
qnx4
ramfs zero i_uid/i_gid on inode allocation 2009-01-05 11:54:28 -05:00
reiserfs Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2 2009-01-05 18:32:43 -08:00
romfs zero i_uid/i_gid on inode allocation 2009-01-05 11:54:28 -05:00
smbfs fs: symlink write_begin allocation context fix 2009-01-04 13:33:20 -08:00
sysfs zero i_uid/i_gid on inode allocation 2009-01-05 11:54:28 -05:00
sysv
ubifs UBIFS: do not use WB_SYNC_HOLD 2009-01-06 15:59:09 -08:00
udf
ufs
xfs
aio.c
anon_inodes.c
attr.c
bad_inode.c
binfmt_aout.c sanitize ifdefs in binfmt_aout 2009-01-03 11:45:54 -08:00
binfmt_elf.c
binfmt_elf_fdpic.c
binfmt_em86.c
binfmt_flat.c
binfmt_misc.c zero i_uid/i_gid on inode allocation 2009-01-05 11:54:28 -05:00
binfmt_script.c
binfmt_som.c
bio-integrity.c
bio.c
block_dev.c
buffer.c block_write_begin(): remove useless goto 2009-01-06 15:59:08 -08:00
char_dev.c
compat.c
compat_binfmt_elf.c
compat_ioctl.c
dcache.c
dcookies.c
direct-io.c fs: truncate blocks outside i_size after O_DIRECT write error 2009-01-06 15:59:06 -08:00
dquot.c quota: Export dquot_alloc() and dquot_destroy() functions 2009-01-05 08:40:25 -08:00
drop_caches.c
eventfd.c
eventpoll.c
exec.c fs/exec.c:__bprm_mm_init(): clean up error handling 2009-01-06 15:59:11 -08:00
fcntl.c
fifo.c
file.c
file_table.c
filesystems.c vfs: remove duplicate code in get_fs_type() 2009-01-05 11:54:29 -05:00
fs-writeback.c fs: sys_sync fix 2009-01-06 15:59:09 -08:00
generic_acl.c
inode.c mm: remove GFP_HIGHUSER_PAGECACHE 2009-01-06 15:59:01 -08:00
internal.h
ioctl.c GFS2: Support for FIEMAP ioctl 2009-01-05 07:38:46 +00:00
ioprio.c
Kconfig fs: use menuconfig to control the Misc. filesystems menu 2009-01-06 15:59:12 -08:00
Kconfig.binfmt
libfs.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2009-01-05 18:32:06 -08:00
locks.c
Makefile quota: Split off quota tree handling into a separate file 2009-01-05 08:40:21 -08:00
mbcache.c
mpage.c do_mpage_readpage(): remove useless clear_buffer_mapped() call 2009-01-06 15:59:01 -08:00
namei.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2009-01-05 18:32:06 -08:00
namespace.c
nfsctl.c
no-block.c
open.c inode->i_op is never NULL 2009-01-05 11:54:28 -05:00
pipe.c sanitize audit_fd_pair() 2009-01-04 15:14:41 -05:00
pnode.c
pnode.h
posix_acl.c
quota.c quota: Introduce DQUOT_QUOTA_SYS_FILE flag 2009-01-05 08:36:57 -08:00
quota_tree.c quota: Split off quota tree handling into a separate file 2009-01-05 08:40:21 -08:00
quota_tree.h quota: Split off quota tree handling into a separate file 2009-01-05 08:40:21 -08:00
quota_v1.c quota: Move quotaio_v[12].h from include/linux/ to fs/ 2009-01-05 08:36:58 -08:00
quota_v2.c quota: Convert union in mem_dqinfo to a pointer 2009-01-05 08:40:21 -08:00
quotaio_v1.h quota: Move quotaio_v[12].h from include/linux/ to fs/ 2009-01-05 08:36:58 -08:00
quotaio_v2.h quota: Split off quota tree handling into a separate file 2009-01-05 08:40:21 -08:00
read_write.c vfs: lseek(fd, 0, SEEK_CUR) race condition 2009-01-05 11:53:07 -05:00
read_write.h
readdir.c
select.c poll: allow f_op->poll to sleep 2009-01-06 15:59:12 -08:00
seq_file.c Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-01-03 12:04:39 -08:00
signalfd.c
splice.c
stack.c
stat.c inode->i_op is never NULL 2009-01-05 11:54:28 -05:00
super.c
sync.c mm: do_sync_mapping_range integrity fix 2009-01-06 15:59:00 -08:00
timerfd.c
utimes.c
xattr.c inode->i_op is never NULL 2009-01-05 11:54:28 -05:00
xattr_acl.c