Luca Porzio d3df0465db mmc: remove bondage between REQ_META and reliable write ... Anytime a write operation is performed with Reliable Write flag enabled, the eMMC device is enforced to bypass the cache and do a write to the underling NVM device by Jedec specification; this causes a performance penalty since write operations can't be optimized by the device cache. In our tests, we replayed a typical mobile daily trace pattern and found ~9% overall time reduction in trace replay by using this patch. Also the write ops within 4KB~64KB chunk size range get a 40~60% performance improvement by using the patch (as this range of write chunks are the ones affected by REQ_META). This patch has been discussed in the Mobile & Embedded Linux Storage Forum and it's the results of feedbacks from many people. We also checked with fsdevl and f2fs mailing list developers that this change in the usage of REQ_META is not affecting FS behavior and we got positive feedbacks. Reporting here the feedbacks: http://comments.gmane.org/gmane.linux.file-systems/97219 http://thread.gmane.org/gmane.linux.file-systems.f2fs/3178/focus=3183 Signed-off-by: Bruce Ford <bford@micron.com> Signed-off-by: Luca Porzio <lporzio@micron.com> Fixes: ce39f9d17c ("mmc: support packed write command for eMMC4.5 devices") Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>		2015-11-09 14:04:52 +01:00
..
accessibility
acpi	asm-generic cleanups	2015-11-06 14:22:15 -08:00
amba
android
ata	Merge branch 'for-4.3-fixes' into for-4.4	2015-11-03 17:29:03 -05:00
atm
auxdisplay
base	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2015-11-07 13:05:44 -08:00
bcma
block	Merge branch 'akpm' (patches from Andrew)	2015-11-07 14:32:45 -08:00
bluetooth	driver core update for 4.4-rc1	2015-11-04 21:50:37 -08:00
bus
cdrom
char	powerpc updates for 4.4	2015-11-05 23:38:43 -08:00
clk	powerpc updates for 4.4	2015-11-05 23:38:43 -08:00
clocksource	Power management and ACPI updates for v4.4-rc1	2015-11-04 18:10:13 -08:00
connector	mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd	2015-11-06 17:50:42 -08:00
cpufreq	Merge branch 'pm-opp'	2015-11-02 00:54:37 +01:00
cpuidle
crypto	asm-generic cleanups	2015-11-06 14:22:15 -08:00
dca
devfreq
dio
dma	char/misc drivers for 4.4-rc1	2015-11-04 22:15:15 -08:00
dma-buf
edac	asm-generic cleanups	2015-11-06 14:22:15 -08:00
eisa
extcon
firewire	mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd	2015-11-06 17:50:42 -08:00
firmware	Half dozen small cleanups plus change to allow pstore	2015-11-05 11:51:18 -08:00
fmc
fpga
gpio	asm-generic cleanups	2015-11-06 14:22:15 -08:00
gpu	Merge branch 'akpm' (patches from Andrew)	2015-11-07 14:32:45 -08:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid	2015-11-07 12:49:27 -08:00
hsi
hv	drivers/hv: share Hyper-V SynIC constants with userspace	2015-11-04 16:24:33 +01:00
hwmon	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2015-11-07 13:05:44 -08:00
hwspinlock
hwtracing
i2c	asm-generic cleanups	2015-11-06 14:22:15 -08:00
ide	mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM	2015-11-06 17:50:42 -08:00
idle
iio	spi: Updates for v4.4	2015-11-05 13:15:12 -08:00
infiniband	Merge branch 'akpm' (patches from Andrew)	2015-11-07 14:32:45 -08:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2015-11-06 11:57:41 -08:00
iommu	mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd	2015-11-06 17:50:42 -08:00
ipack
irqchip	Power management and ACPI updates for v4.4-rc1	2015-11-04 18:10:13 -08:00
isdn	TTY/Serial driver patches for 4.4-rc1	2015-11-04 21:35:12 -08:00
leds	spi: Updates for v4.4	2015-11-05 13:15:12 -08:00
lguest
lightnvm	lightnvm: refactor phys addrs type to u64	2015-11-03 09:53:24 -07:00
macintosh
mailbox	mailbox: mailbox-test: avoid reading iomem twice	2015-11-04 14:03:04 +05:30
mcb
md	Merge branch 'akpm' (patches from Andrew)	2015-11-07 14:32:45 -08:00
media	mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd	2015-11-06 17:50:42 -08:00
memory	char/misc drivers for 4.4-rc1	2015-11-04 22:15:15 -08:00
memstick
message
mfd	asm-generic cleanups	2015-11-06 14:22:15 -08:00
misc	Merge branch 'akpm' (patches from Andrew)	2015-11-07 14:32:45 -08:00
mmc	mmc: remove bondage between REQ_META and reliable write	2015-11-09 14:04:52 +01:00
mtd	Merge branch 'akpm' (patches from Andrew)	2015-11-07 14:32:45 -08:00
net	Merge branch 'akpm' (patches from Andrew)	2015-11-07 14:32:45 -08:00
nfc	spi: Updates for v4.4	2015-11-05 13:15:12 -08:00
ntb
nubus
nvdimm
nvme	Merge branch 'akpm' (patches from Andrew)	2015-11-07 14:32:45 -08:00
nvmem
of	DeviceTree updates for 4.4:	2015-11-06 12:17:09 -08:00
oprofile
parisc
parport
pci	PCI changes for the v4.4 merge window:	2015-11-06 11:29:53 -08:00
pcmcia
perf	arm64 updates for 4.4:	2015-11-04 14:47:13 -08:00
phy	USB patches for 4.4-rc1	2015-11-04 21:26:27 -08:00
pinctrl	This is the bulk of GPIO changes for v4.4:	2015-11-02 12:59:12 -08:00
platform	asm-generic cleanups	2015-11-06 14:22:15 -08:00
pnp
power	- New Device Support	2015-11-06 10:23:50 -08:00
powercap
pps
ps3
ptp
pwm
rapidio
ras
regulator	spi: Updates for v4.4	2015-11-05 13:15:12 -08:00
remoteproc
reset
rpmsg
rtc
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2015-11-04 11:31:31 -08:00
sbus
scsi	Merge branch 'akpm' (patches from Andrew)	2015-11-07 14:32:45 -08:00
sfi
sh
sn
soc
spi	Merge remote-tracking branches 'spi/topic/s3c64xx', 'spi/topic/ti-qspi' and 'spi/topic/txx9' into spi-next	2015-11-04 11:02:16 +00:00
spmi	char/misc drivers for 4.4-rc1	2015-11-04 22:15:15 -08:00
ssb
staging	Merge branch 'akpm' (patches from Andrew)	2015-11-07 14:32:45 -08:00
target
tc
thermal
thunderbolt
tty	asm-generic cleanups	2015-11-06 14:22:15 -08:00
uio
usb	Merge branch 'akpm' (patches from Andrew)	2015-11-07 14:32:45 -08:00
uwb	driver core update for 4.4-rc1	2015-11-04 21:50:37 -08:00
vfio
vhost
video	mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd	2015-11-06 17:50:42 -08:00
virt
virtio
vlynq
vme	char/misc drivers for 4.4-rc1	2015-11-04 22:15:15 -08:00
w1	power supply and reset changes for the v4.4 series	2015-11-05 12:28:15 -08:00
watchdog
xen
zorro
Kconfig	char/misc drivers for 4.4-rc1	2015-11-04 22:15:15 -08:00
Makefile	char/misc drivers for 4.4-rc1	2015-11-04 22:15:15 -08:00