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Ravikiran G Thirumalai c3508f8f34 x86_64: Avoid too many remote cpu references due to /proc/stat 
Too many remote cpu references due to /proc/stat.

On x86_64, with newer kernel versions, kstat_irqs is a bit of a problem.
On every call to kstat_irqs, the process brings in per-cpu data from all
online cpus.  Doing this for NR_IRQS, which is now 256 + 32 * NR_CPUS
results in (256+32*63) * 63 remote cpu references on a 64 cpu config.
/proc/stat is parsed by common commands like top, who etc, causing lots
of cacheline transfers

This statistic seems useless.  Other 'big iron' arches disable this.

AK: changed to remove for all SMP setups
AK: add comment

Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-21 18:37:09 -07:00
..
9p
9p: fix debug compilation error
2007-07-16 16:03:25 -05:00
adfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
affs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
afs
AFS: Use patched rxrpc_kernel_send_data() correctly
2007-07-20 08:54:14 -07:00
autofs
…
autofs4
…
befs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
bfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
cifs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
coda
coda: remove CODA_STORE/CODA_RELEASE upcalls
2007-07-21 17:49:14 -07:00
configfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
cramfs
…
debugfs
debugfs: remove rmdir() non-empty complaint
2007-07-18 15:49:48 -07:00
devpts
…
dlm
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
ecryptfs
fix some conversion overflows
2007-07-20 08:44:19 -07:00
efs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
exportfs
knfsd: exportfs: split out reconnecting a dentry from find_exported_dentry
2007-07-17 10:23:06 -07:00
ext2
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
ext3
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
ext4
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
fat
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
freevxfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
fuse
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
gfs2
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
hfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
hfsplus
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
hostfs
sendfile: remove .sendfile from filesystems that use generic_file_sendfile()
2007-07-10 08:04:13 +02:00
hpfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
hppfs
…
hugetlbfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
isofs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
jbd
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
jbd2
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
jffs2
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
jfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
lockd
knfsd: lockd: nfsd4: use same grace period for lockd and nfsd4
2007-07-17 10:23:07 -07:00
minix
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
msdos
…
ncpfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
nfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
nfs_common
…
nfsd
knfsd: fix typo in export display, print uid and gid as unsigned
2007-07-21 17:49:14 -07:00
nls
NLS: Remove obsolete Makefile entries
2007-07-16 09:05:52 -07:00
ntfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
ocfs2
fix some conversion overflows
2007-07-20 08:44:19 -07:00
openpromfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
partitions
some kmalloc/memset ->kzalloc (tree wide)
2007-07-19 10:04:50 -07:00
proc
x86_64: Avoid too many remote cpu references due to /proc/stat
2007-07-21 18:37:09 -07:00
qnx4
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
ramfs
Add __GFP_MOVABLE for callers to flag allocations from high memory that may be migrated
2007-07-17 10:22:59 -07:00
reiserfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
romfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
smbfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
sysfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
sysv
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
udf
UDF: coding style conversion - lindent fixups
2007-07-21 17:49:14 -07:00
ufs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
vfat
…
xfs
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
aio.c
…
anon_inodes.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm
2007-07-17 11:50:26 -07:00
attr.c
Introduce is_owner_or_cap() to wrap CAP_FOWNER use with fsuid check
2007-07-17 12:00:03 -07:00
bad_inode.c
sendfile: remove bad_sendfile() from bad_file_ops
2007-07-10 08:04:15 +02:00
binfmt_aout.c
…
binfmt_elf_fdpic.c
coredump masking: ELF-FDPIC: enable core dump filtering
2007-07-19 10:04:47 -07:00
binfmt_elf.c
revert "PIE randomization"
2007-07-21 17:49:14 -07:00
binfmt_em86.c
…
binfmt_flat.c
…
binfmt_misc.c
mm: variable length argument support
2007-07-19 10:04:45 -07:00
binfmt_script.c
mm: variable length argument support
2007-07-19 10:04:45 -07:00
binfmt_som.c
…
bio.c
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
block_dev.c
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
buffer.c
fix some conversion overflows
2007-07-20 08:44:19 -07:00
char_dev.c
unregister_chrdev() return void
2007-07-19 10:04:43 -07:00
compat_ioctl.c
compat32: ignore the LOOP_CLR_FD ioctl
2007-07-16 09:05:52 -07:00
compat.c
mm: variable length argument support
2007-07-19 10:04:45 -07:00
dcache.c
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
dcookies.c
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
direct-io.c
…
dnotify.c
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
dquot.c
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
drop_caches.c
invalidate_mapping_pages(): add cond_resched
2007-07-16 09:05:36 -07:00
eventfd.c
…
eventpoll.c
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
exec.c
coredump masking: reimplementation of dumpable using two flags
2007-07-19 10:04:46 -07:00
fcntl.c
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
fifo.c
…
file_table.c
…
file.c
…
filesystems.c
…
fs-writeback.c
…
generic_acl.c
Introduce is_owner_or_cap() to wrap CAP_FOWNER use with fsuid check
2007-07-17 12:00:03 -07:00
inode.c
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
inotify_user.c
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
inotify.c
…
internal.h
…
ioctl.c
drop obsolete sys_ioctl export
2007-07-16 09:05:48 -07:00
ioprio.c
…
Kconfig
NFSD/SUNRPC: Fix the automatic selection of RPCSEC_GSS
2007-07-19 15:09:02 -04:00
Kconfig.binfmt
…
libfs.c
…
locks.c
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
Makefile
…
mbcache.c
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
mpage.c
…
namei.c
fs: remove path_walk export
2007-07-19 10:04:45 -07:00
namespace.c
mm: Remove slab destructors from kmem_cache_create().
2007-07-20 10:11:58 +09:00
nfsctl.c
nfsctl: use vfs_path_lookup
2007-07-19 10:04:45 -07:00
no-block.c
…
open.c
sys_fallocate() implementation on i386, x86_64 and powerpc
2007-07-17 21:42:44 -04:00
pipe.c
pipe: add documentation and comments
2007-07-10 08:04:16 +02:00
pnode.c
…
pnode.h
…
posix_acl.c
…
quota_v1.c
…
quota_v2.c
…
quota.c
diskquota: 32bit quota tools on 64bit architectures
2007-07-16 09:05:48 -07:00
read_write.c
Remove remnants of sendfile()
2007-07-10 08:04:15 +02:00
read_write.h
…
readdir.c
…
select.c
…
seq_file.c
seq_file: more atomicity in traverse()
2007-07-16 09:05:45 -07:00
signalfd.c
…
splice.c
splice: fix bad unlock_page() in error case
2007-07-20 09:07:01 -07:00
stack.c
…
stat.c
…
super.c
hugetlbfs: handle empty options string
2007-07-16 09:05:46 -07:00
sync.c
…
timerfd.c
…
utimes.c
Introduce is_owner_or_cap() to wrap CAP_FOWNER use with fsuid check
2007-07-17 12:00:03 -07:00
xattr_acl.c
…
xattr.c
Introduce is_owner_or_cap() to wrap CAP_FOWNER use with fsuid check
2007-07-17 12:00:03 -07:00