Paolo Valente 43c1b3d6e5 block, bfq: stress that low_latency must be off to get max throughput ... The introduction of the BFQ and Kyber I/O schedulers has triggered a new wave of I/O benchmarks. Unfortunately, comments and discussions on these benchmarks confirm that there is still little awareness that it is very hard to achieve, at the same time, a low latency and a high throughput. In particular, virtually all benchmarks measure throughput, or throughput-related figures of merit, but, for BFQ, they use the scheduler in its default configuration. This configuration is geared, instead, toward a low latency. This is evidently a sign that BFQ documentation is still too unclear on this important aspect. This commit addresses this issue by stressing how BFQ configuration must be (easily) changed if the only goal is maximum throughput. Signed-off-by: Paolo Valente <paolo.valente@linaro.org> Signed-off-by: Jens Axboe <axboe@fb.com>		2017-05-10 07:39:43 -06:00
..
ABI	Staging/IIO patches for 4.12-rc1	2017-05-05 18:16:23 -07:00
accounting	tools: move accounting tool from Documentation	2016-09-23 13:07:15 -06:00
acpi	A reasonably busy cycle for documentation this time around. There is a new	2017-05-02 10:21:17 -07:00
admin-guide	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md	2017-05-03 10:05:38 -07:00
aoe
arm	arm: Documentation: update a path name	2017-04-20 14:06:55 -06:00
arm64	Pre-requisites for the arch timer errata workarounds:	2017-04-07 17:04:19 +01:00
auxdisplay	samples: move auxdisplay example code from Documentation	2016-09-23 11:52:32 -06:00
backlight
blackfin	samples: move blackfin gptimers-example from Documentation	2016-10-10 07:12:02 -06:00
block	block, bfq: stress that low_latency must be off to get max throughput	2017-05-10 07:39:43 -06:00
blockdev	remove the mg_disk driver	2017-04-14 14:00:49 -06:00
bus-devices
cdrom	cdrom: Make device operations read-only	2017-02-14 08:29:56 -07:00
cgroup-v1	Merge branch 'for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2017-02-27 21:41:08 -08:00
cma
connector
console
core-api	docs-rst: core_api: move driver-specific stuff to drivers_api	2017-04-02 14:17:43 -06:00
cpu-freq	cpufreq: User/admin documentation update and consolidation	2017-03-13 17:08:42 -06:00
cpuidle
cris
crypto	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2017-05-03 08:50:52 -07:00
dev-tools	scripts/spelling.txt: add "disble(d)" pattern and fix typo instances	2017-03-09 17:01:09 -08:00
device-mapper	- A major update for DM cache that reduces the latency for deciding	2017-05-03 10:31:20 -07:00
devicetree	DeviceTree for 4.12:	2017-05-05 19:33:07 -07:00
dmaengine	dmaengine: Documentation: Fix typo in pxa_dma.txt	2016-11-14 08:14:24 +05:30
doc-guide	docs-rst: automatically convert Graphviz and SVG images	2017-03-09 02:59:26 -07:00
DocBook	char/misc patches for 4.12-rc1	2017-05-04 19:15:35 -07:00
driver-api	char/misc patches for 4.12-rc1	2017-05-04 19:15:35 -07:00
driver-model	irqdesc: Add a resource managed version of irq_alloc_descs()	2017-02-10 14:39:20 +01:00
early-userspace	Documentation: Fix dead URLs to ftp.kernel.org	2017-03-29 15:46:06 -06:00
EDID	drm: use .hword to represent 16-bit numbers	2017-03-30 10:15:19 +02:00
extcon	extcon: Remove porting compatibility of swich class	2017-04-06 10:55:24 +09:00
fault-injection
fb
features	powerpc updates for 4.12 part 1.	2017-05-05 11:36:44 -07:00
filesystems	proc: show MADV_FREE pages info in smaps	2017-05-03 15:52:08 -07:00
firmware_class	firmware: revamp firmware documentation	2017-01-11 09:42:59 +01:00
fmc
fpga	fpga: Add scatterlist based programming	2017-02-10 15:20:44 +01:00
frv	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
gpio	gpio: return NULL from gpiod_get_optional when GPIOLIB is disabled	2017-03-15 11:16:30 +01:00
gpu	drm: Document code of conduct	2017-05-05 11:48:17 +10:00
hid	Documentation: hid: fix path to input bus definitions	2017-03-13 17:15:19 -06:00
hwmon	drivers: hwmon: Support for ASPEED PWM/Fan tach	2017-04-10 13:12:18 -07:00
i2c	i2c: i801: Add support for Intel Gemini Lake	2017-02-09 17:39:16 +01:00
ia64	selftests: move ia64 tests from Documentation/ia64	2016-09-20 09:58:12 -06:00
ide
iio	iio: Documentation: Correct the path used to create triggers.	2016-10-01 00:49:58 -06:00
infiniband	IB/opa-vnic: Virtual Network Interface Controller (VNIC) documentation	2017-04-20 12:01:06 -04:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2017-05-03 12:38:20 -07:00
ioctl	docs: Fix a spelling error in ioctl-number.txt	2017-04-27 15:54:38 -06:00
isdn	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
kbuild	Kconfig: Introduce the "imply" keyword	2016-11-16 09:26:33 +01:00
kdump	Documentation: kdump: describe arm64 port	2017-04-05 18:32:32 +01:00
laptops	platform/x86: thinkpad_acpi: Add support for X1 Yoga (2016) Tablet Mode	2016-12-13 09:29:06 -08:00
leds	Documentaion: leds: leds-lp55xx.txt: Fix typos	2017-03-17 13:06:14 -06:00
lightnvm	lightnvm: physical block device (pblk) target	2017-04-16 10:06:33 -06:00
livepatch	livepatch: allow removal of a disabled patch	2017-03-08 09:38:43 +01:00
locking	locking/ww_mutex/Documentation: Update the design document	2017-01-14 11:14:55 +01:00
m68k	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
md	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md	2017-05-03 10:05:38 -07:00
media	media updates for v4.12-rc1	2017-05-05 17:34:57 -07:00
memory-devices
metag
mic	samples: move mic/mpssd example code from Documentation	2016-09-20 12:38:48 -06:00
mips
misc-devices	samples: move misc-devices/mei example code from Documentation	2016-09-23 11:51:43 -06:00
mmc	MMC core:	2017-05-02 17:34:32 -07:00
mn10300
mtd	spi-nor: Add support for Intel SPI serial flash controller	2017-01-03 17:33:36 +00:00
namespaces
netlabel
networking	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2017-05-02 16:40:27 -07:00
nfc
nios2
nvdimm	libnvdimm, btt: update the usage section in Documentation	2016-06-17 16:23:23 -07:00
nvmem
parisc
PCI	pci-error-recovery: doc cleanup	2017-03-29 15:51:32 -06:00
pcmcia	tools: move pcmcia crc32hash tool from Documentation	2016-09-23 13:07:27 -06:00
perf	perf: qcom: Add L3 cache PMU driver	2017-04-03 18:53:50 +01:00
phy
platform
power	A reasonably busy cycle for documentation this time around. There is a new	2017-05-02 10:21:17 -07:00
powerpc	powerpc updates for 4.12 part 1.	2017-05-05 11:36:44 -07:00
pps	Doc: clarify source of jitter in USB1.1, and USB2.0	2017-01-04 14:40:52 -07:00
prctl	selftests: move prctl tests from Documentation/prctl	2016-09-20 09:09:09 -06:00
process	docs: complete bumping minimal GNU Make version to 3.81	2017-05-06 18:49:09 -07:00
pti
ptp	selftests: move ptp tests from Documentation/ptp	2016-09-20 09:54:38 -06:00
rapidio	rapidio/documentation/mport_cdev: add missing parameter description	2016-09-01 17:52:02 -07:00
RCU	Merge branches 'doc.2017.01.15b', 'dyntick.2017.01.23a', 'fixes.2017.01.23a', 'srcu.2017.01.25a' and 'torture.2017.01.15b' into HEAD	2017-01-25 12:56:05 -08:00
s390	docs: add documentation for vfio-ccw	2017-03-31 12:55:11 +02:00
scheduler	sched/Documentation: Add 'sched-pelt' tool	2017-04-14 10:26:35 +02:00
scsi	scsi: make asynchronous aborts mandatory	2017-04-06 13:07:33 -04:00
security	KEYS: add SP800-56A KDF support for DH	2017-04-04 22:33:38 +01:00
serial	Documentation: rs485: Do not define manually the ioctl	2016-08-18 11:08:33 -06:00
sh
sound	ALSA: hda - Allow to enable/disable vmaster build explicitly	2017-04-10 17:45:27 +02:00
sparc	Documentation/sparc: Steps for sending break on sunhv console	2017-02-23 08:27:25 -08:00
sphinx	tmplcvt: make the tool more robust	2017-04-11 14:35:15 -06:00
sphinx-static	This is the documentation update pull for the 4.9 merge window.	2016-10-04 13:54:07 -07:00
spi	spi: spi-ep93xx: simplify GPIO chip selects	2017-02-16 20:10:26 +00:00
sysctl	Replace 2 jiffies with sysctl netdev_budget_usecs to enable softirq tuning	2017-04-21 13:22:34 -04:00
target
thermal	Doc/PM: Sync with intel_powerclamp code behavior	2017-04-20 15:35:03 -06:00
timers	time: Remove CONFIG_TIMER_STATS	2017-02-10 11:15:08 +01:00
trace	New features for this release:	2017-05-03 18:41:21 -07:00
translations	Documentation: Add HOWTO Japanese translation into rst based build system	2017-04-08 11:13:05 -06:00
usb	USB patches for 4.12-rc1	2017-05-04 18:03:51 -07:00
userspace-api	docs: Convert unshare.txt to RST and add to the user-space API manual	2017-04-02 15:18:32 -06:00
virtual	KVM/ARM Fixes for v4.11-rc6	2017-04-05 16:27:47 +02:00
vm	Documentation: vm, add hugetlbfs reservation overview	2017-05-03 15:52:11 -07:00
w1	w1: add documentation for w1_ds2438	2017-03-17 15:10:49 +09:00
watchdog	watchdog: Introduce watchdog_stop_on_unregister helper	2017-02-24 14:00:23 -08:00
wimax
x86	Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-05-01 23:54:56 -07:00
xtensa	xtensa: cleanup MMU setup and kernel layout macros	2016-07-24 06:33:58 +03:00
.gitignore	Add .pyc files to .gitignore	2016-06-30 13:07:33 -06:00
00-INDEX	Documentation: move MD related doc into a separate dir	2017-02-13 09:17:53 -08:00
bcache.txt	bcache: documentation formatting, edited for clarity, stripe alignment notes	2016-06-23 07:58:38 -06:00
bt8xxgpio.txt
btmrvl.txt
bus-virt-phys-mapping.txt
cachetlb.txt
cgroup-v2.txt	mm: memcontrol: provide shmem statistics	2017-05-03 15:52:08 -07:00
Changes	docs: add back 'Documentation/Changes' file (as symlink)	2016-12-14 16:30:12 -08:00
circular-buffers.txt	Documentation: circular-buffers: use READ_ONCE()	2016-11-16 16:17:45 -07:00
clk.txt	Documentation: clk: update file names containing referenced structures	2016-08-14 12:12:36 -06:00
CodingStyle	doc: re-add CodingStyle and SubmittingPatches	2016-10-24 08:12:35 -02:00
conf.py	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2017-05-03 12:38:20 -07:00
cpu-load.txt
cputopology.txt	docs: Fix a couple typos	2017-04-27 15:54:39 -06:00
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt	docs: Fix a couple typos	2017-04-27 15:54:39 -06:00
dell_rbu.txt
digsig.txt
DMA-API-HOWTO.txt	Documentation: DMA-API-HOWTO: Fix a typo	2016-09-20 17:58:46 -06:00
DMA-API.txt	dma-mapping: add dma_{map,unmap}_resource	2016-09-26 22:16:41 +05:30
DMA-attributes.txt	common: DMA-mapping: add DMA_ATTR_PRIVILEGED attribute	2017-01-19 15:56:19 +00:00
DMA-ISA-LPC.txt	Documentation: DMA-ISA-LPC.txt	2017-02-12 15:20:07 -07:00
docutils.conf	doc-rst: add docutils config file	2016-08-14 11:52:40 -06:00
dontdiff	Documentation: dontdiff: Update with additional entries	2017-01-26 15:08:06 -07:00
efi-stub.txt
eisa.txt
flexible-arrays.txt
futex-requeue-pi.txt
gcc-plugins.txt	gcc-plugins: update architecture list in documentation	2017-03-21 22:20:05 +11:00
highuid.txt
hw_random.txt
hwspinlock.txt
index.rst	Merge branch 'user-space-api' into docs-next	2017-04-08 11:25:37 -06:00
intel_txt.txt
Intel-IOMMU.txt
io_ordering.txt
io-mapping.txt
iostats.txt
IPMI.txt	Documentation: Fix a typo in IPMI.txt.	2017-01-05 15:01:54 -06:00
IRQ-affinity.txt
IRQ-domain.txt
IRQ.txt
irqflags-tracing.txt
isa.txt
isapnp.txt
kernel-doc-nano-HOWTO.txt	docs-rst: doc-guide: split the kernel-documentation.rst contents	2016-11-19 10:22:04 -07:00
kernel-per-CPU-kthreads.txt	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
kobject.txt
kprobes.txt	Documentation: kprobes: Document jprobes stack copying limitations	2016-08-15 10:19:11 -06:00
kref.txt	Revert "kref: double kref_put() in my_data_handler()"	2017-04-08 18:38:10 +02:00
kselftest.txt	scripts/spelling.txt: add "an user" pattern and fix typo instances	2017-02-27 18:43:46 -08:00
ldm.txt
lockup-watchdogs.txt	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
logo.gif
logo.txt
lzo.txt
mailbox.txt
Makefile	samples: move blackfin gptimers-example from Documentation	2016-10-10 07:12:02 -06:00
Makefile.sphinx	Add a target to check broken external links in the Documentation	2017-02-15 15:22:47 -07:00
memory-barriers.txt	doc: Update control-dependencies section of memory-barriers.txt	2017-01-14 21:29:15 -08:00
memory-hotplug.txt	scripts/spelling.txt: add "followings" pattern and fix typo instances	2017-02-27 18:43:47 -08:00
men-chameleon-bus.txt
nommu-mmap.txt
ntb.txt
numastat.txt
padata.txt
parport-lowlevel.txt
percpu-rw-semaphore.txt
phy.txt	Documentation: phy: Fix repetition of word 'the'	2017-03-09 00:33:15 -07:00
pi-futex.txt
pinctrl.txt	pinctrl: core: Fix pinctrl_register_and_init() with pinctrl_enable()	2017-04-07 01:08:08 +02:00
pnp.txt
preempt-locking.txt
printk-formats.txt
pwm.txt
rbtree.txt
remoteproc.txt	remoteproc: Split driver and consumer dereferencing	2016-10-02 22:50:21 -07:00
rfkill.txt	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
robust-futex-ABI.txt
robust-futexes.txt
rpmsg.txt
rtc.txt
SAK.txt
sgi-ioc4.txt
siphash.txt	siphash: implement HalfSipHash1-3 for hash tables	2017-01-09 13:58:57 -05:00
SM501.txt
smsc_ece1099.txt
static-keys.txt	docs: Fix a couple typos	2017-04-27 15:54:39 -06:00
SubmittingPatches	doc: re-add CodingStyle and SubmittingPatches	2016-10-24 08:12:35 -02:00
svga.txt
sync_file.txt	Documentation: sync_file.txt: Fix typos	2017-03-17 13:03:36 -06:00
this_cpu_ops.txt
unaligned-memory-access.txt	Documentation/unaligned-memory-access.txt: fix incorrect comparison operator	2016-12-27 13:08:42 -07:00
vfio-mediated-device.txt	docs: Fix a spelling error in vfio-mediated-device.txt	2017-04-27 15:54:39 -06:00
vfio.txt
video-output.txt
xillybus.txt
xz.txt
zorro.txt	docs: Fix a couple typos	2017-04-27 15:54:39 -06:00