KAMEZAWA Hiroyuki 34e55232e5 mm: avoid false sharing of mm_counter ... Considering the nature of per mm stats, it's the shared object among threads and can be a cache-miss point in the page fault path. This patch adds per-thread cache for mm_counter. RSS value will be counted into a struct in task_struct and synchronized with mm's one at events. Now, in this patch, the event is the number of calls to handle_mm_fault. Per-thread value is added to mm at each 64 calls. rough estimation with small benchmark on parallel thread (2threads) shows [before] 4.5 cache-miss/faults [after] 4.0 cache-miss/faults Anyway, the most contended object is mmap_sem if the number of threads grows. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2010-03-06 11:26:24 -08:00
..
ABI	Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6	2010-03-03 08:48:58 -08:00
accounting
acpi
aoe
arm	ARM: 5930/1: Add PKMAP area description to memory.txt.	2010-02-15 21:40:33 +00:00
auxdisplay
blackfin
block	Merge branch 'master' into for-2.6.34	2010-02-22 13:48:51 +01:00
blockdev
cdrom
cgroups
connector
console
cpu-freq
cpuidle
cris
crypto
development-process
device-mapper
DocBook	docbook: fix errors from x86 headers merger	2010-03-03 07:32:39 -08:00
driver-model
dvb	V4L/DVB: get_dvb_firmware: Fix typo, sort list of components	2010-02-26 15:10:56 -03:00
early-userspace
fault-injection
fb
filesystems	mm: avoid false sharing of mm_counter	2010-03-06 11:26:24 -08:00
firmware_class
frv
hwmon
i2c	i2c: Document the message size limit	2010-03-02 12:23:49 +01:00
i2o
ia64
ide
infiniband
input	Merge branch 'next' into for-linus	2010-02-28 23:55:20 -08:00
ioctl	USB: vstusb.c: removal of driver for Vernier Software & Technology, Inc., devices and spectrometers	2010-03-02 14:55:08 -08:00
isdn	gigaset: small documentation improvement	2010-02-26 01:24:22 -08:00
ja_JP
kbuild
kdump
ko_KR
kvm	KVM: trivial document fixes	2010-03-01 12:35:43 -03:00
laptops	thinkpad-acpi: lock down video output state access	2010-02-25 22:22:22 -03:00
lguest	lguest: remove unneeded zlib.h include in example launcher	2010-02-24 14:22:22 +10:30
m68k
make
mips
misc-devices
mn10300
mtd
namespaces
netlabel
networking	Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6	2010-03-03 08:48:58 -08:00
parisc
PCI
pcmcia	pcmcia: use ops_mutex for rsrc_{mgr,nonstatic} locking	2010-02-17 17:48:24 +01:00
power
powerpc	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx	2010-03-04 08:20:14 -08:00
pps
prctl
RCU	rcu: Use canonical URL for Mathieu's dissertation	2010-02-25 10:34:56 +01:00
s390	[S390] cio: introduce cio_settle	2010-02-26 22:37:29 +01:00
scheduler
scsi	[SCSI] megaraid_sas: version and documentation update	2010-02-17 13:13:00 -06:00
serial
sh
sound	Merge branch 'topic/hda' into for-linus	2010-03-01 12:38:54 +01:00
sparc
spi
sysctl
telephony
thermal
timers
trace	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-02-28 10:20:25 -08:00
uml
usb	USB: convert to the runtime PM framework	2010-03-02 14:54:12 -08:00
video4linux	V4L/DVB: Documentation: gspca.txt: update known mr97310a cams	2010-02-26 15:11:09 -03:00
vm	failslab: add ability to filter slab caches	2010-02-26 19:19:39 +02:00
w1
watchdog
wimax
x86	x86, numa: Remove configurable node size support for numa emulation	2010-02-15 14:34:18 -08:00
zh_CN
00-INDEX
applying-patches.txt
atomic_ops.txt
bad_memory.txt
basic_profiling.txt
binfmt_misc.txt
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
BUG-HUNTING
cachetlb.txt	Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm	2010-03-01 09:15:15 -08:00
Changes
CodingStyle
cpu-hotplug.txt
cpu-load.txt
cputopology.txt
credentials.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt
devices.txt
DMA-API.txt
DMA-attributes.txt
DMA-ISA-LPC.txt
dmaengine.txt
dontdiff	Merge branch 'for-linus-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-kconfig	2010-02-25 14:43:57 -08:00
dynamic-debug-howto.txt
edac.txt
eisa.txt
email-clients.txt
feature-removal-schedule.txt	Merge branch 'kvm-updates/2.6.34' of git://git.kernel.org/pub/scm/virt/kvm/kvm	2010-03-05 13:12:34 -08:00
flexible-arrays.txt
futex-requeue-pi.txt
gcov.txt
gpio.txt
highuid.txt
HOWTO
hw_random.txt
initrd.txt
intel_txt.txt
Intel-IOMMU.txt
io_ordering.txt
io-mapping.txt
IO-mapping.txt
iostats.txt
IPMI.txt
IRQ-affinity.txt
IRQ.txt
irqflags-tracing.txt
isapnp.txt
java.txt
kernel-doc-nano-HOWTO.txt
kernel-docs.txt
kernel-parameters.txt	Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-03-03 08:15:37 -08:00
keys-request-key.txt
keys.txt
kmemcheck.txt
kmemleak.txt
kobject.txt
kprobes.txt	kprobes: Add documents of jump optimization	2010-02-25 17:49:27 +01:00
kref.txt
ldm.txt
leds-class.txt
leds-lp3944.txt
local_ops.txt
lockdep-design.txt
lockstat.txt
logo.gif
logo.txt
magic-number.txt
Makefile
ManagementStyle
mca.txt
md.txt
memory-barriers.txt
memory-hotplug.txt
memory.txt
mono.txt
mutex-design.txt
nmi_watchdog.txt
nommu-mmap.txt
numastat.txt
oops-tracing.txt
parport-lowlevel.txt
parport.txt
pi-futex.txt
pnp.txt
preempt-locking.txt
printk-formats.txt
prio_tree.txt
rbtree.txt
rfkill.txt
robust-futex-ABI.txt
robust-futexes.txt
rt-mutex-design.txt
rt-mutex.txt
rtc.txt
SAK.txt
SecurityBugs
SELinux.txt
serial-console.txt
sgi-ioc4.txt
sgi-visws.txt
slow-work.txt
SM501.txt
Smack.txt
sparse.txt
spinlocks.txt
stable_api_nonsense.txt
stable_kernel_rules.txt
SubmitChecklist
SubmittingDrivers
SubmittingPatches
svga.txt
sysfs-rules.txt
sysrq.txt
tomoyo.txt
unaligned-memory-access.txt
unicode.txt
unshare.txt
VGA-softcursor.txt
vgaarbiter.txt
video-output.txt
volatile-considered-harmful.txt
voyager.txt
zorro.txt