Alan D. Brunelle 488991e28e block: Added in stricter no merge semantics for block I/O ...

Updated 'nomerges' tunable to accept a value of '2' - indicating that _no_
merges at all are to be attempted (not even the simple one-hit cache).

The following table illustrates the additional benefit - 5 minute runs of
a random I/O load were applied to a dozen devices on a 16-way x86_64 system.

nomerges        Throughput      %System         Improvement (tput / %sys)
--------        ------------    -----------     -------------------------
0               12.45 MB/sec    0.669365609
1               12.50 MB/sec    0.641519199     0.40% / 2.71%
2               12.52 MB/sec    0.639849750     0.56% / 2.96%

Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

2010-01-29 09:04:08 +01:00

..

ABI

block: Added in stricter no merge semantics for block I/O

2010-01-29 09:04:08 +01:00

accounting

Documentation/: fix warnings from -Wmissing-prototypes in HOSTCFLAGS

2009-09-23 07:39:28 -07:00

acpi

ACPI: support customizing ACPI control methods at runtime

2009-12-11 01:50:08 -05:00

aoe

…

arm

OMAP: DSS2: Documentation for DSS2

2009-12-09 12:04:34 +02:00

auxdisplay

includecheck fix: Documentation, cfag12864b-example.c

2009-09-24 07:20:57 -07:00

blackfin

Blackfin: add an example showing how to use the gptimers API

2009-12-15 00:15:04 -05:00

block

block: Added in stricter no merge semantics for block I/O

2010-01-29 09:04:08 +01:00

blockdev

The DRBD driver

2009-10-01 21:17:49 +02:00

cdrom

debugfs: Fix terminology inconsistency of dir name to mount debugfs filesystem.

2009-06-15 21:30:28 -07:00

cgroups

blkio: Documentation

2009-12-03 19:28:53 +01:00

connector

connector: Provide the sender's credentials to the callback

2009-10-02 10:54:01 -07:00

console

…

cpu-freq

[ACPI/CPUFREQ] Introduce bios_limit per cpu cpufreq sysfs interface

2009-11-24 13:33:34 -05:00

cpuidle

…

cris

…

crypto

async_tx: add support for asynchronous RAID6 recovery operations

2009-08-29 19:09:27 -07:00

development-process

docs: Encourage better changelogs in the development process document

2009-06-04 10:32:49 -06:00

device-mapper

dm snapshot: add merge target

2009-12-10 23:52:30 +00:00

DocBook

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6

2009-12-16 10:09:16 -08:00

driver-model

Driver core: driver_attribute parameters can often be const*

2009-12-23 11:23:43 -08:00

dvb

tree-wide: fix assorted typos all over the place

2009-12-04 15:39:55 +01:00

early-userspace

…

fault-injection

debugfs: Fix terminology inconsistency of dir name to mount debugfs filesystem.

2009-06-15 21:30:28 -07:00

fb

viafb: documentation update

2009-12-16 07:20:05 -08:00

filesystems

ext4: Update documentation to correct the inode_readahead_blks option name

2009-12-24 17:51:42 -05:00

firmware_class

driver core: fix documentation of request_firmware_nowait

2009-06-15 21:30:24 -07:00

frv

…

hwmon

hwmon: New driver for AMD Family 10h/11h CPUs

2009-12-16 21:38:25 +01:00

i2c

i2c: Get rid of struct i2c_client_address_data

2009-12-14 21:17:25 +01:00

i2o

…

ia64

Documentation/: fix warnings from -Wmissing-prototypes in HOSTCFLAGS

2009-09-23 07:39:28 -07:00

ide

ide: preserve Host Protected Area by default (v2)

2009-06-07 13:52:52 +02:00

infiniband

IB: Fix typo in ipoib.txt

2009-12-09 14:21:36 -08:00

input

Input: add new driver for Sentelic Finger Sensing Pad

2009-08-19 21:46:09 -07:00

ioctl

drivers/char/uv_mmtimer.c: add memory mapped RTC driver for UV

2009-09-24 07:21:03 -07:00

isdn

gigaset: documentation amendments

2009-12-08 20:30:41 -08:00

ja_JP

block: rename CONFIG_LBD to CONFIG_LBDAF

2009-06-19 08:08:50 +02:00

kbuild

kbuild: generate modules.builtin

2009-12-12 13:08:16 +01:00

kdump

trivial: Miscellaneous documentation typo fixes

2009-06-12 18:01:47 +02:00

ko_KR

…

kvm

KVM: x86: Extend KVM_SET_VCPU_EVENTS with selective updates

2009-12-27 13:36:33 -02:00

laptops

thinkpad-acpi: update volume subdriver documentation

2009-12-26 22:37:58 -05:00

lguest

tree-wide: fix assorted typos all over the place

2009-12-04 15:39:55 +01:00

m68k

…

make

…

mips

ide: remove unused CONFIG_BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ

2009-01-14 19:19:03 +01:00

misc-devices

ad525x_dpot: new driver for AD525x digital potentiometers

2009-12-15 08:53:25 -08:00

mn10300

trivial: Miscellaneous documentation typo fixes

2009-06-12 18:01:47 +02:00

mtd

trivial: Miscellaneous documentation typo fixes

2009-06-12 18:01:47 +02:00

namespaces

…

netlabel

…

networking

ipv4 05/05: add sysctl to accept packets with local source addresses

2009-12-03 12:14:38 -08:00

parisc

…

PCI

PCI: document PCIe fundamental reset interfaces

2009-09-09 13:29:38 -07:00

pcmcia

pcmcia: remove now-defunct cs_error, pcmcia_error_{func,ret}

2009-11-09 08:30:06 +01:00

power

PM: Runtime PM documentation update

2009-12-22 20:43:40 +01:00

powerpc

Merge commit 'kumar/next' into merge

2009-12-21 09:30:42 +11:00

pps

LinuxPPS: core support

2009-06-18 13:04:04 -07:00

prctl

…

RCU

rcu: Add synchronize_srcu_expedited() to the documentation

2009-10-26 09:40:31 +01:00

s390

[S390] s390dbf: Add description for usage of "%s" in sprintf events

2009-09-11 10:29:53 +02:00

scheduler

sched: Documentation/sched-rt-group: Fix style issues & bump version

2009-06-21 13:12:46 +02:00

scsi

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2009-12-09 19:43:33 -08:00

serial

tty: docs: serial/tty, add to ldisc methods

2009-12-11 15:18:05 -08:00

sh

sh: Kill off remaining CONFIG_SH_KGDB bits.

2008-12-22 18:44:05 +09:00

sound

ALSA: Fix a typo in Procfile.txt

2009-12-26 18:37:44 +01:00

sparc

…

spi

tree-wide: fix assorted typos all over the place

2009-12-04 15:39:55 +01:00

sysctl

doc: Add documentation for bootloader_{type,version}

2009-12-11 14:28:56 -08:00

telephony

…

thermal

thermal: add sanity check for the passive attribute

2009-11-05 18:18:10 -05:00

timers

fix URL in hpet.txt

2009-11-09 09:40:54 +01:00

trace

mm tracing: cleanup Documentation/trace/events-kmem.txt

2009-12-22 14:17:55 -08:00

uml

…

usb

USB: power management documentation update

2009-12-23 11:34:09 -08:00

video4linux

V4L/DVB (13651): sh_mobile_ceu_camera: document the scaling and cropping algorithm

2009-12-16 09:27:20 -02:00

vm

HWPOISON: Use correct name for MADV_HWPOISON in documentation

2009-12-16 12:20:00 +01:00

w1

ds2482: Discard obsolete detect method

2009-10-04 22:53:41 +02:00

watchdog

Documentation/: fix warnings from -Wmissing-prototypes in HOSTCFLAGS

2009-09-23 07:39:28 -07:00

wimax

i2400m: documentation and instructions for usage

2009-01-07 10:00:18 -08:00

x86

USB: ehci-dbgp,documentation: Documentation updates for ehci-dbgp

2009-09-23 06:46:39 -07:00

zh_CN

…

00-INDEX

Bluetooth: Add documentation for Marvell Bluetooth driver

2009-08-22 14:25:32 -07:00

applying-patches.txt

…

atomic_ops.txt

Documentation/atomic_ops.txt: fix sample code

2009-06-16 19:47:52 -07:00

bad_memory.txt

…

basic_profiling.txt

…

binfmt_misc.txt

…

braille-console.txt

trivial: Miscellaneous documentation typo fixes

2009-06-12 18:01:47 +02:00

bt8xxgpio.txt

…

btmrvl.txt

Bluetooth: Add documentation for Marvell Bluetooth driver

2009-08-22 14:25:32 -07:00

BUG-HUNTING

…

cachetlb.txt

…

Changes

netfilter: xtables: document minimal required version

2009-12-14 14:52:10 +01:00

CodingStyle

trivial: fix typo milisecond/millisecond for documentation and source comments.

2009-06-12 18:01:46 +02:00

cpu-hotplug.txt

cpumask: don't recommend set_cpus_allowed hack in Documentation/cpu-hotplug.txt

2009-12-17 11:43:29 +10:30

cpu-load.txt

…

cputopology.txt

Documentation: ABI: /sys/devices/system/cpu/cpu#/ topology files

2009-10-30 14:59:52 -07:00

credentials.txt

…

dcdbas.txt

…

debugging-modules.txt

…

debugging-via-ohci1394.txt

ieee1394: update URLs in debugging-via-ohci1394.txt

2009-10-03 09:28:11 +02:00

dell_rbu.txt

trivial: Documentation/dell_rbu.txt: fix typos

2009-06-12 18:01:50 +02:00

devices.txt

lanana: assign a device name and numbering for MAX3100

2009-04-07 08:44:05 -07:00

DMA-API.txt

trivial: Miscellaneous documentation typo fixes

2009-06-12 18:01:47 +02:00

DMA-attributes.txt

…

DMA-ISA-LPC.txt

…

DMA-mapping.txt

use DMA_BIT_MASK instead of inline constant

2009-12-09 18:59:52 -08:00

dmaengine.txt

async_tx, dmaengine: document channel allocation and api rework

2009-01-05 18:10:19 -07:00

dontdiff

dontdiff: add generated

2009-12-12 13:08:13 +01:00

dynamic-debug-howto.txt

Dynamic debug: allow simple quoting of words

2009-03-24 16:38:27 -07:00

edac.txt

fix typos/grammos in Documentation/edac.txt

2009-12-04 15:39:53 +01:00

eisa.txt

…

email-clients.txt

…

feature-removal-schedule.txt

Merge branch 'asus' into release

2009-12-15 22:34:48 -05:00

flexible-arrays.txt

Update flex_arrays.txt

2009-10-15 07:25:20 -06:00

futex-requeue-pi.txt

futex: add requeue-pi documentation

2009-05-09 07:12:50 +02:00

gcov.txt

trivial: fix typo in CONFIG_DEBUG_FS in gcov doc

2009-09-21 15:14:56 +02:00

gpio.txt

gpiolib: add support for changing value polarity in sysfs

2009-12-16 07:20:01 -08:00

highuid.txt

…

HOWTO

…

hw_random.txt

…

initrd.txt

…

intel_txt.txt

x86, intel_txt: Intel TXT boot support

2009-07-21 11:49:06 -07:00

Intel-IOMMU.txt

intel-iommu: Kill DMAR_BROKEN_GFX_WA option.

2009-09-19 09:37:23 -07:00

io_ordering.txt

…

io-mapping.txt

…

IO-mapping.txt

Documentation: move DMA-mapping.txt to Doc/PCI/

2009-01-29 18:19:29 -08:00

iostats.txt

…

IPMI.txt

…

IRQ-affinity.txt

…

IRQ.txt

…

irqflags-tracing.txt

…

isapnp.txt

…

java.txt

…

kernel-doc-nano-HOWTO.txt

kernel-doc: allow multi-line declaration purpose descriptions

2009-09-18 09:48:52 -07:00

kernel-docs.txt

…

kernel-parameters.txt

ACPI: introduce kernel parameter acpi_sleep=sci_force_enable

2009-12-30 18:32:01 -05:00

keys-request-key.txt

…

keys.txt

KEYS: Add a keyctl to install a process's session keyring on its parent [try #6]

2009-09-02 21:29:22 +10:00

kmemcheck.txt

kmemcheck: update documentation

2009-07-01 22:36:22 +02:00

kmemleak.txt

kmemleak: add clear command support

2009-09-08 16:36:08 +01:00

kobject.txt

trivial: Miscellaneous documentation typo fixes

2009-06-12 18:01:47 +02:00

kprobes.txt

debugfs: Fix terminology inconsistency of dir name to mount debugfs filesystem.

2009-06-15 21:30:28 -07:00

kref.txt

kref: double kref_put() in my_data_handler()

2009-09-18 09:48:52 -07:00

ldm.txt

…

leds-class.txt

led: document sysfs interface

2009-08-28 15:21:12 -04:00

leds-lp3944.txt

leds: LED driver for National Semiconductor LP3944 Funlight Chip

2009-06-23 20:21:38 +01:00

local_ops.txt

trivial: Miscellaneous documentation typo fixes

2009-06-12 18:01:47 +02:00

lockdep-design.txt

lockdep: Fix typos in documentation

2009-08-07 12:03:46 +02:00

lockstat.txt

lockstat: Add usage info to Documentation/lockstat.txt

2009-12-06 13:20:02 +01:00

logo.gif

Revert "linux.conf.au 2009: Tuz"

2009-04-27 12:00:27 -07:00

logo.txt

Revert "linux.conf.au 2009: Tuz"

2009-04-27 12:00:27 -07:00

magic-number.txt

documentation: update header file paths

2009-01-06 15:59:28 -08:00

Makefile

…

ManagementStyle

…

mca.txt

…

md.txt

md: add 'recovery_start' per-device sysfs attribute

2009-12-14 12:58:57 +11:00

memory-barriers.txt

sched: Document memory barriers implied by sleep/wake-up primitives

2009-04-29 14:15:55 +02:00

memory-hotplug.txt

mm: add numa node symlink for memory section in sysfs

2009-12-15 08:53:17 -08:00

memory.txt

Documentation/memory.txt: remove some very outdated recommendations

2009-09-22 07:17:26 -07:00

mono.txt

…

mutex-design.txt

…

nmi_watchdog.txt

…

nommu-mmap.txt

nommu: fix malloc performance by adding uninitialized flag

2009-12-15 08:53:24 -08:00

numastat.txt

mm: fix NUMA accounting in numastat.txt

2009-09-22 07:17:39 -07:00

oops-tracing.txt

docs: Describe the 'C' taint flag in oops-tracing.txt

2009-11-09 09:40:56 +01:00

parport-lowlevel.txt

…

parport.txt

…

pi-futex.txt

…

pnp.txt

…

preempt-locking.txt

…

printk-formats.txt

…

prio_tree.txt

…

rbtree.txt

trivial: rbtree.txt: fix rb_entry() parameters in sample code

2009-06-12 18:01:47 +02:00

rfkill.txt

rfkill: export persistent attribute in sysfs

2009-06-19 11:50:18 -04:00

robust-futex-ABI.txt

futex: documentation: fix inconsistent description of futex list_op_pending

2009-06-18 13:03:56 -07:00

robust-futexes.txt

…

rt-mutex-design.txt

…

rt-mutex.txt

…

rtc.txt

rtc: add boot_timesource sysfs attribute

2009-09-23 07:39:46 -07:00

SAK.txt

…

SecurityBugs

…

SELinux.txt

…

serial-console.txt

…

sgi-ioc4.txt

…

sgi-visws.txt

…

slow-work.txt

SLOW_WORK: Move slow_work's proc file to debugfs

2009-12-01 08:20:31 -08:00

SM501.txt

trivial: Miscellaneous documentation typo fixes

2009-06-12 18:01:47 +02:00

Smack.txt

smack: implement logging V3

2009-04-14 09:00:23 +10:00

sparse.txt

Documentation: explain the difference between __bitwise and __bitwise__

2009-04-11 08:18:11 +02:00

spinlocks.txt

Documentation: rw_lock lessons learned

2009-12-14 09:46:56 -08:00

stable_api_nonsense.txt

…

stable_kernel_rules.txt

Doc/stable rules: add new cherry-pick logic

2009-12-23 11:23:43 -08:00

SubmitChecklist

doc: SubmitChecklist, add ioctls, remove OSDL reference

2009-12-16 07:20:06 -08:00

SubmittingDrivers

…

SubmittingPatches

docs: update patch size in SubmittingPatches

2009-10-01 16:11:12 -07:00

svga.txt

…

sysfs-rules.txt

Doc/sysfs-rules: Swap the order of the words so the sentence makes more sense

2009-05-08 19:22:20 -07:00

sysrq.txt

sysrq, kdump: make sysrq-c consistent

2009-07-29 19:10:36 -07:00

tomoyo.txt

tomoyo: add Documentation/tomoyo.txt

2009-04-14 09:14:58 +10:00

unaligned-memory-access.txt

…

unicode.txt

…

unshare.txt

…

VGA-softcursor.txt

…

vgaarbiter.txt

vgaarbiter: fix a typo in the vgaarbiter Documentation

2009-12-16 11:28:58 -08:00

video-output.txt

…

volatile-considered-harmful.txt

…

voyager.txt

…

zorro.txt

…