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fa3536cc14
linux/fs
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Eric Dumazet fa3536cc14 [PATCH] Use __read_mostly on some hot fs variables 
I discovered on oprofile hunting on a SMP platform that dentry lookups were
slowed down because d_hash_mask, d_hash_shift and dentry_hashtable were in
a cache line that contained inodes_stat.  So each time inodes_stats is
changed by a cpu, other cpus have to refill their cache line.

This patch moves some variables to the __read_mostly section, in order to
avoid false sharing.  RCU dentry lookups can go full speed.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-26 08:56:56 -08:00
..
9p [PATCH] 9p: fix name consistency problems 2006-03-25 08:22:54 -08:00
adfs [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
affs [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
afs [PATCH] Make address_space_operations->invalidatepage return void 2006-03-26 08:56:55 -08:00
autofs
autofs4 [PATCH] sem2mutex: autofs4 wq_sem 2006-03-23 07:38:13 -08:00
befs fix typos "wich" -> "which" 2006-03-24 18:23:14 +01:00
bfs [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
cifs [PATCH] Make address_space_operations->sync_page return void 2006-03-26 08:56:55 -08:00
coda BUG_ON() Conversion in fs/coda/ 2006-03-24 18:42:13 +01:00
configfs
cramfs [PATCH] sem2mutex: fs/ 2006-03-26 08:56:55 -08:00
debugfs [PATCH] debugfs: Add debugfs_create_blob() helper for exporting binary data 2006-03-20 13:42:59 -08:00
devfs
devpts [PATCH] devpts: use lib/parser.c for parsing mount options 2006-03-23 07:38:17 -08:00
efs [PATCH] cpuset memory spread: slab cache filesystems 2006-03-24 07:33:23 -08:00
exportfs
ext2 [PATCH] Ext2 flags shouldn't report "nogrpid" 2006-03-25 08:22:58 -08:00
ext3 [PATCH] Make address_space_operations->invalidatepage return void 2006-03-26 08:56:55 -08:00
fat [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
freevxfs [PATCH] cpuset memory spread: slab cache filesystems 2006-03-24 07:33:23 -08:00
fuse
hfs
hfsplus
hostfs
hpfs [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
hppfs
hugetlbfs [PATCH] convert hugetlbfs_counter to atomic 2006-03-22 07:54:04 -08:00
isofs [PATCH] isofs: remove unused debugging macros 2006-03-24 07:33:24 -08:00
jbd [PATCH] Make address_space_operations->invalidatepage return void 2006-03-26 08:56:55 -08:00
jffs [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
jffs2 [PATCH] sem2mutex: fs/ 2006-03-26 08:56:55 -08:00
jfs [PATCH] Make address_space_operations->invalidatepage return void 2006-03-26 08:56:55 -08:00
lockd [PATCH] sem2mutex: fs/ 2006-03-26 08:56:55 -08:00
minix [PATCH] fix messages in fs/minix 2006-03-25 08:22:56 -08:00
msdos
ncpfs [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
nfs [PATCH] Make address_space_operations->invalidatepage return void 2006-03-26 08:56:55 -08:00
nfs_common
nfsd [PATCH] sem2mutex: fs/ 2006-03-26 08:56:55 -08:00
nls [PATCH] fs: Use ARRAY_SIZE macro 2006-03-24 07:33:19 -08:00
ntfs [PATCH] cpuset memory spread: slab cache filesystems 2006-03-24 07:33:23 -08:00
ocfs2 ocfs2: finally remove MLF* macros 2006-03-24 14:58:29 -08:00
openpromfs
partitions [PATCH] sem2mutex: fs/ 2006-03-26 08:56:55 -08:00
proc [PATCH] protect remove_proc_entry 2006-03-26 08:56:53 -08:00
qnx4 [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
ramfs [PATCH] fs/*/file.c: drop insane header dependencies 2006-03-23 07:38:17 -08:00
reiserfs [PATCH] Make address_space_operations->invalidatepage return void 2006-03-26 08:56:55 -08:00
romfs [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
smbfs [PATCH] smbfs: Fix debug logging-only compilation error 2006-03-25 08:22:55 -08:00
sysfs [PATCH] sysfs: fix a kobject leak in sysfs_add_link on the error path 2006-03-20 13:42:59 -08:00
sysv [PATCH] cpuset memory spread: slab cache filesystems 2006-03-24 07:33:23 -08:00
udf [PATCH] udf: fix uid/gid options and add uid/gid=ignore and forget options 2006-03-25 08:23:00 -08:00
ufs typo patch for fs/ufs/super.c 2006-03-24 18:21:44 +01:00
vfat
xfs [PATCH] Make address_space_operations->invalidatepage return void 2006-03-26 08:56:55 -08:00
aio.c [PATCH] use kzalloc and kcalloc in core fs code 2006-03-25 08:23:00 -08:00
attr.c
bad_inode.c
binfmt_aout.c
binfmt_elf_fdpic.c BUG_ON() Conversion in fs/binfmt_elf_fdpic.c 2006-03-24 18:38:48 +01:00
binfmt_elf.c [PATCH] x86_64: Increase the variability of the process stack on 64bit architectures 2006-03-25 09:10:52 -08:00
binfmt_em86.c
binfmt_flat.c [PATCH] flat binary loader doesn't check fd table full 2006-03-25 08:23:01 -08:00
binfmt_misc.c
binfmt_script.c
binfmt_som.c
bio.c [PATCH] Use __read_mostly on some hot fs variables 2006-03-26 08:56:56 -08:00
block_dev.c [PATCH] Use __read_mostly on some hot fs variables 2006-03-26 08:56:56 -08:00
buffer.c [PATCH] Make address_space_operations->invalidatepage return void 2006-03-26 08:56:55 -08:00
char_dev.c [PATCH] use kzalloc and kcalloc in core fs code 2006-03-25 08:23:00 -08:00
compat_ioctl.c [PATCH] fs: Use ARRAY_SIZE macro 2006-03-24 07:33:19 -08:00
compat.c [PATCH] use kzalloc and kcalloc in core fs code 2006-03-25 08:23:00 -08:00
dcache.c [PATCH] Use __read_mostly on some hot fs variables 2006-03-26 08:56:56 -08:00
dcookies.c [PATCH] Use __read_mostly on some hot fs variables 2006-03-26 08:56:56 -08:00
direct-io.c [PATCH] direct-io: bug fix in dio handling write error 2006-03-25 08:23:00 -08:00
dnotify.c [PATCH] Use __read_mostly on some hot fs variables 2006-03-26 08:56:56 -08:00
dquot.c [PATCH] cpuset memory spread: slab cache format 2006-03-24 07:33:23 -08:00
drop_caches.c
eventpoll.c [PATCH] Use __read_mostly on some hot fs variables 2006-03-26 08:56:56 -08:00
exec.c [PATCH] use kzalloc and kcalloc in core fs code 2006-03-25 08:23:00 -08:00
fcntl.c [PATCH] Use __read_mostly on some hot fs variables 2006-03-26 08:56:56 -08:00
fifo.c
file_table.c [PATCH] get_empty_filp tweaks, inline epoll_init_file() 2006-03-23 07:38:17 -08:00
file.c [PATCH] Shrinks sizeof(files_struct) and better layout 2006-03-23 07:38:09 -08:00
filesystems.c
fs-writeback.c [PATCH] Move cond_resched() after iput() in sync_sb_inodes() 2006-03-25 08:22:56 -08:00
inode.c [PATCH] Use __read_mostly on some hot fs variables 2006-03-26 08:56:56 -08:00
inotify.c [PATCH] Use __read_mostly on some hot fs variables 2006-03-26 08:56:56 -08:00
ioctl.c
ioprio.c
Kconfig Merge branch 'linus' 2006-03-23 23:44:19 -05:00
Kconfig.binfmt
libfs.c [PATCH] sem2mutex: fs/libfs.c 2006-03-23 07:38:12 -08:00
locks.c [PATCH] Use __read_mostly on some hot fs variables 2006-03-26 08:56:56 -08:00
Makefile [PATCH] relay: migrate from relayfs to a generic relay API 2006-03-23 19:56:55 +01:00
mbcache.c [PATCH] cpuset memory spread: slab cache filesystems 2006-03-24 07:33:23 -08:00
mpage.c
namei.c Merge branch 'audit.b3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current 2006-03-25 09:24:53 -08:00
namespace.c [PATCH] Use __read_mostly on some hot fs variables 2006-03-26 08:56:56 -08:00
nfsctl.c [PATCH] fs: Use ARRAY_SIZE macro 2006-03-24 07:33:19 -08:00
open.c Merge branch 'audit.b3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current 2006-03-25 09:24:53 -08:00
pipe.c [PATCH] Use __read_mostly on some hot fs variables 2006-03-26 08:56:56 -08:00
pnode.c [PATCH] s/;;/;/g 2006-03-24 07:33:24 -08:00
pnode.h
posix_acl.c
quota_v1.c
quota_v2.c [PATCH] sem2mutex: quota 2006-03-23 07:38:11 -08:00
quota.c [PATCH] sem2mutex: quota 2006-03-23 07:38:11 -08:00
read_write.c [PATCH] remove needless check in fs/read_write.c 2006-03-25 08:23:01 -08:00
readdir.c
select.c
seq_file.c [PATCH] sem2mutex: fs/seq_file.c 2006-03-23 07:38:12 -08:00
stat.c
super.c [PATCH] sem2mutex: fs/ 2006-03-26 08:56:55 -08:00
xattr_acl.c
xattr.c [PATCH] Collect more inode information during syscall processing. 2006-03-20 14:08:53 -05:00