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dcd195071f
linux/drivers
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Mikulas Patocka dcd195071f dm writecache: improve performance of large linear writes on SSDs 
When dm-writecache is used with SSD as a cache device, it would submit a
separate bio for each written block. The I/Os would be merged by the disk
scheduler, but this merging degrades performance.

Improve dm-writecache performance by submitting larger bios - this is
possible as long as there is consecutive free space on the cache
device.

Benchmark (arm64 with 64k page size, using /dev/ram0 as a cache device):

fio --bs=512k --iodepth=32 --size=400M --direct=1 \
    --filename=/dev/mapper/cache --rw=randwrite --numjobs=1 --name=test

block	old	new
size	MiB/s	MiB/s
---------------------
512	181	700
1k	347	1256
2k	644	2020
4k	1183	2759
8k	1852	3333
16k	2469	3509
32k	2974	3670
64k	3404	3810

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2020-01-16 13:34:17 -05:00
..
accessibility
acpi ACPI: PM: Avoid attaching ACPI PM domain to certain devices 2019-12-10 00:22:18 +01:00
amba
android binder: fix incorrect calculation for num_valid 2019-12-14 09:10:47 +01:00
ata ata: ahci_brcm: Add missing clock management during recovery 2019-12-25 20:47:24 -07:00
atm
auxdisplay auxdisplay: charlcd: deduplicate simple_strtoul() 2019-12-04 19:44:12 -08:00
base Merge branch 'remove-ksys-mount-dup' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux 2019-12-15 11:36:12 -08:00
bcma
block block-5.5-20200103 2020-01-03 12:11:30 -08:00
bluetooth Bluetooth: btbcm: Use the BDADDR_PROPERTY quirk 2019-11-22 13:35:20 +01:00
bus bus: ti-sysc: Fix missing reset delay handling 2019-12-12 08:20:10 -08:00
cdrom cdrom: respect device capabilities during opening action 2019-11-26 13:02:24 -07:00
char agp: remove unused variable arqsz in agp_3_5_enable() 2020-01-03 16:08:05 +10:00
clk clk: qcom: Avoid SMMU/cx gdsc corner cases 2019-12-18 22:02:27 -08:00
clocksource clocksource: riscv: add notrace to riscv_sched_clock 2020-01-04 21:48:48 -08:00
connector
counter
cpufreq cpufreq: vexpress-spc: Switch cpumask from topology core to OPP sharing 2019-12-09 11:52:50 +00:00
cpuidle cpuidle: Drop unnecessary type cast in cpuidle_poll_time() 2019-12-12 17:56:08 +01:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-12-02 17:23:21 -08:00
dax libnvdimm for 5.5 2019-12-01 18:43:25 -08:00
dca
devfreq PM / devfreq: tegra: Add COMMON_CLK dependency 2019-12-23 10:42:58 +09:00
dio
dma ioat: ioat_alloc_ring() failure handling. 2019-12-27 12:06:06 +05:30
dma-buf - A fix for a memory leak in the dma-buf support 2019-12-09 17:13:19 +10:00
edac riscv: move sifive_l2_cache.c to drivers/soc 2019-12-20 03:40:24 -08:00
eisa
extcon Char/Misc driver patches for 5.5-rc1 2019-11-27 10:53:50 -08:00
firewire FireWire (IEEE 1394) subsystem updates: 2019-12-02 14:13:00 -08:00
firmware Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-12-17 10:39:55 -08:00
fpga
fsi
gnss
gpio A set of fixes for the v5.5 series: 2019-12-27 11:02:48 -08:00
gpu Merge tag 'amd-drm-fixes-5.5-2020-01-01' of git://people.freedesktop.org/~agd5f/linux into drm-fixes 2020-01-02 10:16:04 +10:00
greybus
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid 2019-12-01 18:20:54 -08:00
hsi
hv Merge branch 'akpm' (patches from Andrew) 2019-12-01 20:36:41 -08:00
hwmon compat_ioctl: remove most of fs/compat_ioctl.c 2019-12-01 13:46:15 -08:00
hwspinlock
hwtracing intel_th: msu: Fix window switching without windows 2019-12-17 15:45:59 +01:00
i2c i2c: remove i2c_new_dummy() API 2019-12-10 23:15:09 +01:00
i3c
ide compat_ioctl: remove most of fs/compat_ioctl.c 2019-12-01 13:46:15 -08:00
idle cpuidle: Drop disabled field from struct cpuidle_state 2019-11-29 11:48:39 +01:00
iio First set of fixes for IIO in the 5.5 cycle. 2019-12-09 09:27:52 +01:00
infiniband Pull request for 5.5-rc2 2019-12-15 14:58:13 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2019-12-07 18:33:01 -08:00
interconnect interconnect: qcom: msm8974: Walk the list safely on node removal 2019-12-12 10:28:54 +01:00
iommu IOMMU Fixes for Linux v5.5-rc2 2019-12-20 10:42:25 -08:00
ipack
irqchip riscv: prefix IRQ_ macro names with an RV_ namespace 2020-01-04 21:48:59 -08:00
isdn compat_ioctl: remove most of fs/compat_ioctl.c 2019-12-01 13:46:15 -08:00
leds Merge tag 'leds-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds 2019-12-01 16:09:28 -08:00
lightnvm
macintosh powerpc updates for 5.5 2019-11-30 14:35:43 -08:00
mailbox mailbox changes for v5.5 2019-12-01 18:42:02 -08:00
mcb
md dm writecache: improve performance of large linear writes on SSDs 2020-01-16 13:34:17 -05:00
media media updates for v5.5-rc5 2020-01-04 10:41:08 -08:00
memory memory: tegra: Fixes for v5.5-rc1 2019-12-06 08:28:51 -08:00
memstick pci-v5.5-changes 2019-12-03 13:58:22 -08:00
message
mfd chrome platform changes for v5.5 2019-12-03 14:37:12 -08:00
misc powerpc fixes for 5.5 #4 2019-12-21 06:17:05 -08:00
mmc mmc: sdhci-of-esdhc: re-implement erratum A-009204 workaround 2019-12-19 08:13:43 +01:00
mtd TTY/Serial patches for 5.5-rc1 2019-12-03 14:09:14 -08:00
mux
net net: dsa: sja1105: Reconcile the meaning of TPID and TPID2 for E/T and P/Q/R/S 2019-12-30 20:15:02 -08:00
nfc nfc: s3fwrn5: replace the assertion with a WARN_ON 2019-12-19 17:33:23 -08:00
ntb Add Hygon Device ID to the AMD NTB device driver 2019-12-07 18:38:17 -08:00
nubus
nvdimm libnvdimm for 5.5 2019-12-01 18:43:25 -08:00
nvme for-linus-20191212 2019-12-13 14:27:19 -08:00
nvmem ARM: SoC-related driver updates 2019-12-05 11:43:31 -08:00
of Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-12-22 09:54:33 -08:00
opp
oprofile Printk changes for 5.5 2019-11-25 19:40:40 -08:00
parisc
parport parport: daisy: use new parport device model 2019-11-13 19:09:49 +08:00
pci PCI: rockchip: Fix IO outbound ATU register number 2019-12-12 15:25:37 -06:00
pcmcia pcmcia: remove unused dprintk definition 2019-11-22 07:03:45 +01:00
perf perf/smmuv3: Remove the leftover put_cpu() in error path 2019-12-18 16:15:36 +00:00
phy ARM: SoC-related driver updates 2019-12-05 11:43:31 -08:00
pinctrl pinctrl: ingenic: Fixup PIN_CONFIG_OUTPUT config 2019-12-16 11:38:20 +01:00
platform A collection of MIPS fixes: 2020-01-04 14:16:57 -08:00
pnp
power Additional power management updates for 5.5-rc1 2019-12-04 10:48:09 -08:00
powercap
pps
ps3
ptp ptp: fix the race between the release of ptp_clock and cdev 2019-12-30 20:19:27 -08:00
pwm pwm: Changes for v5.5-rc1 2019-12-05 11:28:14 -08:00
rapidio drivers/rapidio/rio-access.c: fix missing include of <linux/rio_drv.h> 2019-12-04 19:44:13 -08:00
ras
regulator regulator: Fixes for v5.5 2019-12-17 13:08:41 -08:00
remoteproc remoteproc: stm32: fix probe error case 2019-11-18 20:35:16 -08:00
reset reset: Do not register resource data for missing resets 2019-12-10 11:43:37 +01:00
rpmsg rpmsg updates for v5.5 2019-12-01 18:39:24 -08:00
rtc RTC for 5.5 2019-12-03 13:31:08 -08:00
s390 s390/qeth: fix initialization on old HW 2019-12-24 22:41:06 -08:00
sbus
scsi SCSI fixes on 20191227 2019-12-27 17:28:41 -08:00
sfi
sh
siox
slimbus
soc riscv: move sifive_l2_cache.c to drivers/soc 2019-12-20 03:40:24 -08:00
soundwire
spi spi: Fixes for v5.5 2019-12-17 13:06:31 -08:00
spmi
ssb
staging media updates for v5.5-rc5 2020-01-04 10:41:08 -08:00
target SCSI fixes on 20191227 2019-12-27 17:28:41 -08:00
tc
tee Merge mainline/master into arm/fixes 2019-12-05 13:18:54 -08:00
thermal thermal: power_allocator: Fix Kconfig warning 2019-12-07 21:49:06 +08:00
thunderbolt thunderbolt: Power cycle the router if NVM authentication fails 2019-11-19 17:35:57 +01:00
tty tty/serial: atmel: fix out of range clock divider handling 2019-12-17 14:17:32 +01:00
uio uio: fix irq init with dt support & irq not defined 2019-11-14 11:49:48 +08:00
usb usb: xhci: Fix build warning seen with CONFIG_PM=n 2019-12-18 19:23:42 +01:00
vfio VFIO updates for v5.5-rc1 2019-12-07 14:51:04 -08:00
vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-12-08 13:28:11 -08:00
video pci-v5.5-changes 2019-12-03 13:58:22 -08:00
virt compat_ioctl: remove most of fs/compat_ioctl.c 2019-12-01 13:46:15 -08:00
virtio virtio_balloon: divide/multiply instead of shifts 2019-12-11 08:14:07 -05:00
visorbus
vlynq
vme
w1 w1: new driver. DS2430 chip 2019-11-14 13:06:33 +08:00
watchdog linux-watchdog 5.5-rc1 tag 2019-12-01 18:01:03 -08:00
xen xen: branch for v5.5-rc3 2019-12-21 06:24:56 -08:00
zorro
Kconfig
Makefile