Javier González dd2a434373 lightnvm: pblk: sched. metadata on write thread ... At the moment, line metadata is persisted on a separate work queue, that is kicked each time that a line is closed. The assumption when designing this was that freeing the write thread from creating a new write request was better than the potential impact of writes colliding on the media (user I/O and metadata I/O). Experimentation has proven that this assumption is wrong; collision can cause up to 25% of bandwidth and introduce long tail latencies on the write thread, which potentially cause user write threads to spend more time spinning to get a free entry on the write buffer. This patch moves the metadata logic to the write thread. When a line is closed, remaining metadata is written in memory and is placed on a metadata queue. The write thread then takes the metadata corresponding to the previous line, creates the write request and schedules it to minimize collisions on the media. Using this approach, we see that we can saturate the media's bandwidth, which helps reducing both write latencies and the spinning time for user writer threads. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2017-06-26 16:27:39 -06:00
..
accessibility
acpi	Merge branch 'uuid-types' of bombadil.infradead.org:public_git/uuid into nvme-base	2017-06-13 11:45:14 +02:00
amba
android
ata	libata: fix error checking in in ata_parse_force_one()	2017-05-31 14:26:26 -04:00
atm
auxdisplay
base	Merge branches 'intel_pstate' and 'pm-sleep'	2017-06-09 01:25:16 +02:00
bcma
block	mtip32xx: fix up the checking for internal command failure	2017-06-23 09:18:54 -06:00
bluetooth	Bluetooth: hci_ldisc: Add protocol check to hci_uart_tx_wakeup()	2017-04-30 12:22:14 +02:00
bus
cdrom	block: Make most scsi_req_init() calls implicit	2017-06-20 19:27:14 -06:00
char	Merge branch 'uuid-types' of bombadil.infradead.org:public_git/uuid into nvme-base	2017-06-13 11:45:14 +02:00
clk	Sort of on the quieter side this time, which is probably due more	2017-05-10 13:38:18 -07:00
clocksource	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-05-12 10:43:25 -07:00
connector
cpufreq	Merge branches 'intel_pstate' and 'pm-sleep'	2017-06-09 01:25:16 +02:00
cpuidle	Merge branches 'pm-domains', 'pm-cpuidle', 'pm-sleep' and 'powercap'	2017-05-09 23:21:46 +02:00
crypto	virtio: fixes, cleanups, performance	2017-05-10 11:33:08 -07:00
dax	device-dax: fix 'dax' device filesystem inode destruction crash	2017-06-09 08:50:49 -07:00
dca
devfreq
dio
dma	dmaengine: pl330: fix warning in pl330_remove	2017-06-02 11:49:44 +05:30
dma-buf	dma-buf: Rename dma-ops to prevent conflict with kunmap_atomic macro	2017-04-20 13:47:46 +05:30
edac	EDAC, amd64: Fix reporting of Chip Select sizes on Fam17h	2017-05-03 16:27:36 +02:00
eisa
extcon
firewire
firmware	Char/Misc driver fixes for 4.12-rc5	2017-06-11 11:29:15 -07:00
fmc
fpga	fpga fr br: update supported version numbers	2017-04-26 11:38:56 +02:00
fsi
gpio	gpio: mvebu: fix gpio bank registration when pwm is used	2017-06-09 09:38:27 +02:00
gpu	Merge branch 'uuid-types' of bombadil.infradead.org:public_git/uuid into nvme-base	2017-06-13 11:45:14 +02:00
hid	ACPI: Switch to use generic guid_t in acpi_evaluate_dsm()	2017-06-07 12:20:49 +02:00
hsi	HSI: ssi_protocol: double free in ssip_pn_xmit()	2017-04-21 17:58:45 +02:00
hv	char/misc patches for 4.12-rc1	2017-05-04 19:15:35 -07:00
hwmon	hwmon: (aspeed-pwm-tacho) make fan/pwm names start with index 1	2017-06-03 03:55:43 -07:00
hwspinlock
hwtracing	drivers/hwtracing/intel_th/msu.c: use set_memory.h header	2017-05-08 17:15:14 -07:00
i2c	i2c: designware: Fix bogus sda_hold_time due to uninitialized vars	2017-05-22 19:22:19 -07:00
ide	block: Change argument type of scsi_req_init()	2017-06-20 19:27:14 -06:00
idle	x86/intel_idle: add Gemini Lake support	2017-05-01 23:17:37 +02:00
iio	First set of IIO fixes in the 4.12 cycle.	2017-05-22 21:53:09 +02:00
infiniband	RDMA/SA: Fix kernel panic in CMA request handler flow	2017-06-01 17:20:14 -04:00
input	Input: synaptics-rmi4 - register F03 port as pass-through serio	2017-06-09 09:57:19 -07:00
iommu	Merge branch 'uuid-types' of bombadil.infradead.org:public_git/uuid into nvme-base	2017-06-13 11:45:14 +02:00
ipack
irqchip	Xtensa fixes for v4.12-rc6	2017-06-13 15:09:10 +09:00
isdn	mISDN: Fix a sleep-in-atomic bug	2017-06-01 14:49:47 -04:00
leds	leds: pca955x: Correct I2C Functionality	2017-05-22 21:12:44 +02:00
lguest
lightnvm	lightnvm: pblk: sched. metadata on write thread	2017-06-26 16:27:39 -06:00
macintosh	DeviceTree for 4.12:	2017-05-05 19:33:07 -07:00
mailbox	mailbox: handle empty message in tx_tick	2017-04-27 16:20:04 +05:30
mcb
md	blk-mq: use the introduced blk_mq_unquiesce_queue()	2017-06-18 14:20:04 -06:00
media	media fixes for v4.12-rc4	2017-06-06 09:37:44 -07:00
memory	Merge tag 'at91-4.12-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux into fixes	2017-06-01 17:07:31 -07:00
memstick	block: introduce new block status code type	2017-06-09 09:27:32 -06:00
message	scsi: mpt: Move scsi_remove_host() out of mptscsih_remove_host()	2017-04-24 18:21:17 -04:00
mfd	mfd: axp20x: Support AXP803 variant	2017-04-27 11:54:49 +01:00
misc	Char/Misc driver fixes for 4.12-rc5	2017-06-11 11:29:15 -07:00
mmc	Merge branch 'uuid-types' of bombadil.infradead.org:public_git/uuid into nvme-base	2017-06-13 11:45:14 +02:00
mtd	Linux 4.12-rc5	2017-06-12 08:30:13 -06:00
net	Merge branch 'uuid-types' of bombadil.infradead.org:public_git/uuid into nvme-base	2017-06-13 11:45:14 +02:00
nfc	nfc: fix get_unaligned_...() misuses	2017-04-17 00:42:22 +02:00
ntb
nubus	nubus: Clean up whitespace	2017-04-20 09:54:24 +02:00
nvdimm	Merge branch 'uuid-types' of bombadil.infradead.org:public_git/uuid into nvme-base	2017-06-13 11:45:14 +02:00
nvme	lightnvm: propagate right error code to target	2017-06-26 16:24:53 -06:00
nvmem	ARM: SoC driver updates	2017-05-09 10:01:15 -07:00
of	iommu/of: Ignore all errors except EPROBE_DEFER	2017-05-30 11:31:32 +02:00
oprofile
parisc
parport	Annotate hardware config module parameters in drivers/parport/	2017-04-20 12:02:32 +01:00
pci	ACPI: Switch to use generic guid_t in acpi_evaluate_dsm()	2017-06-07 12:20:49 +02:00
pcmcia	Annotation of module parameters that specify device settings	2017-05-10 19:13:03 -07:00
perf	drivers/perf: arm_pmu_acpi: avoid perf IRQ init when guest PMU is off	2017-05-30 12:40:03 +01:00
phy	phy: qualcomm: phy-qcom-qmp: fix application of sizeof to pointer	2017-06-01 15:03:41 +05:30
pinctrl	pinctrl: sunxi: Fix SPDIF function name for A83T	2017-05-23 11:31:27 +02:00
platform	goldfish_pipe: use GFP_ATOMIC under spin lock	2017-05-25 18:26:11 +02:00
pnp
power	power supply and reset changes for the v4.12 series (part 2)	2017-05-12 12:02:21 -07:00
powercap	PowerCap: Fix an error code in powercap_register_zone()	2017-05-14 13:30:05 +02:00
pps
ps3
ptp	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-05-01 16:15:18 -07:00
pwm
rapidio	char/misc patches for 4.12-rc1	2017-05-04 19:15:35 -07:00
ras
regulator	Merge remote-tracking branch 'regulator/topic/vctrl' into regulator-next	2017-04-30 22:17:44 +09:00
remoteproc	virtio: fixes, cleanups, performance	2017-05-10 11:33:08 -07:00
reset	reset: hi6220: Set module license so that it can be loaded	2017-05-24 10:53:41 +02:00
rpmsg	virtio: fixes, cleanups, performance	2017-05-10 11:33:08 -07:00
rtc	Merge branches 'pm-sleep' and 'powercap'	2017-05-22 20:32:05 +02:00
s390	Merge commit '8e8320c9315c' into for-4.13/block	2017-06-22 21:55:24 -06:00
sbus	block: introduce new block status code type	2017-06-09 09:27:32 -06:00
scsi	block: Change argument type of scsi_req_init()	2017-06-20 19:27:14 -06:00
sfi
sh
sn
soc	ARM: SoC fixes (and a cross-arch dt-include fix)	2017-05-19 13:36:56 -07:00
spi	Merge remote-tracking branches 'spi/topic/ti-qspi' and 'spi/topic/xlp' into spi-next	2017-04-26 15:58:22 +01:00
spmi
ssb
staging	Staging/IIO fixes for 4.12-rc5	2017-06-11 11:25:51 -07:00
target	block: Make most scsi_req_init() calls implicit	2017-06-20 19:27:14 -06:00
tc
tee	Linux 4.12-rc1	2017-05-18 23:54:47 -07:00
thermal	thermal: int340x_thermal: fix compile after the UUID API switch	2017-06-09 16:37:31 +02:00
thunderbolt
tty	Revert "tty: fix port buffer locking"	2017-06-04 10:23:25 +02:00
uio	uio: fix incorrect memory leak cleanup	2017-05-16 23:06:41 +02:00
usb	Merge branch 'uuid-types' of bombadil.infradead.org:public_git/uuid into nvme-base	2017-06-13 11:45:14 +02:00
uwb	uwb: fix device quirk on big-endian hosts	2017-05-17 11:27:41 +02:00
vfio	powerpc updates for 4.12 part 1.	2017-05-05 11:36:44 -07:00
vhost	mm: support __GFP_REPEAT in kvmalloc_node for >32kB	2017-05-08 17:15:12 -07:00
video	fbdev changes for v4.12:	2017-05-11 11:12:26 -07:00
virt	drivers/virt/fsl_hypervisor.c: use get_user_pages_unlocked()	2017-05-08 17:15:10 -07:00
virtio	virtio: allow extra context per descriptor	2017-05-02 23:41:43 +03:00
vlynq
vme
w1
watchdog	watchdog: bcm281xx: Fix use of uninitialized spinlock.	2017-05-19 10:42:25 +02:00
xen	Merge branch 'uuid-types' of bombadil.infradead.org:public_git/uuid into nvme-base	2017-06-13 11:45:14 +02:00
zorro
Kconfig
Makefile	Merge branch 'tee/initial-merge' into fixes	2017-05-10 21:03:31 +02:00