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Tang Junhui a728eacbbd bcache: add journal statistic 
Sometimes, Journal takes up a lot of CPU, we need statistics
to know what's the journal is doing. So this patch provide
some journal statistics:
1) reclaim: how many times the journal try to reclaim resource,
   usually the journal bucket or/and the pin are exhausted.
2) flush_write: how many times the journal try to flush btree node
   to cache device, usually the journal bucket are exhausted.
3) retry_flush_write: how many times the journal retry to flush
   the next btree node, usually the previous tree node have been
   flushed by other thread.
we show these statistic by sysfs interface. Through these statistics
We can totally see the status of journal module when the CPU is too
high.

Signed-off-by: Tang Junhui <tang.junhui@zte.com.cn>
Reviewed-by: Michael Lyle <mlyle@lyle.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 		2018-02-07 12:50:01 -07:00
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accessibility
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acpi libnvdimm for 4.16 2018-02-06 10:41:33 -08:00
amba
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android Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
ata pci-v4.16-changes 2018-02-06 09:59:40 -08:00
atm
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auxdisplay
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base drm/graphics pull request for v4.16-rc1 2018-02-01 17:48:47 -08:00
bcma Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-01-19 22:59:33 -05:00
block pci-v4.16-changes 2018-02-06 09:59:40 -08:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-01-31 14:31:10 -08:00
bus ARM: SoC driver updates for 4.16 2018-02-01 16:35:31 -08:00
cdrom
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char pci-v4.16-changes 2018-02-06 09:59:40 -08:00
clk The core framework has a handful of patches this time around, mostly due 2018-02-01 16:56:07 -08:00
clocksource
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connector
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cpufreq
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cpuidle powerpc updates for 4.16 2018-02-02 10:01:04 -08:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-01-31 14:22:45 -08:00
dax Merge branch 'for-4.16/dax' into libnvdimm-for-next 2018-02-03 00:26:10 -07:00
dca
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devfreq
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dio
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dma Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2018-02-02 09:50:51 -08:00
dma-buf drm/graphics pull request for v4.16-rc1 2018-02-01 17:48:47 -08:00
edac
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eisa EISA: Delete error message for a failed memory allocation in eisa_probe() 2018-01-23 09:04:10 +01:00
extcon
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firewire IEEE 1394 subsystem patches: 2018-02-02 14:57:44 -08:00
firmware pci-v4.16-changes 2018-02-06 09:59:40 -08:00
fmc
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fpga
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fsi
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gpio This is the bulk of pin control changes for the v4.16 kernel cycle: 2018-02-02 14:22:53 -08:00
gpu pci-v4.16-changes 2018-02-06 09:59:40 -08:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2018-01-31 13:00:01 -08:00
hsi HSI changes for the v4.16 series 2018-01-31 12:54:05 -08:00
hv Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
hwmon hwmon: (dell-smm) Disable fan support for Dell Vostro 3360 2018-01-27 09:34:22 -08:00
hwspinlock
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hwtracing Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
i2c Merge branch 'i2c/for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2018-02-04 10:57:43 -08:00
ide pci-v4.16-changes 2018-02-06 09:59:40 -08:00
idle
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iio Staging/IIO patches for 4.16-rc1 2018-02-01 09:51:57 -08:00
infiniband Second pull request for 4.16 merge window 2018-02-06 11:09:45 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2018-02-01 10:49:58 -08:00
iommu pci-v4.16-changes 2018-02-06 09:59:40 -08:00
ipack
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irqchip pci-v4.16-changes 2018-02-06 09:59:40 -08:00
isdn Merge branch 'work.sock_recvmsg' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2018-01-30 18:59:03 -08:00
leds LED updates for 4.16-rc1 2018-01-31 12:22:41 -08:00
lightnvm
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macintosh pci-v4.16-changes 2018-02-06 09:59:40 -08:00
mailbox Misc driver changes only : 2018-02-04 11:11:23 -08:00
mcb
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md bcache: add journal statistic 2018-02-07 12:50:01 -07:00
media media updates for v4.16-rc1 2018-02-06 11:27:48 -08:00
memory ARM: SoC driver updates for 4.16 2018-02-01 16:35:31 -08:00
memstick
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message
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mfd regmap: Updates for v4.16 2018-01-29 11:35:24 -08:00
misc Merge branch 'i2c/for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2018-02-04 10:57:43 -08:00
mmc MMC host: 2018-02-05 09:51:15 -08:00
mtd dma mapping changes for Linux 4.16: 2018-01-31 11:32:27 -08:00
mux Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
net Second pull request for 4.16 merge window 2018-02-06 11:09:45 -08:00
nfc
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ntb NTB: ntb_perf: fix cast to restricted __le32 2018-01-28 22:17:24 -05:00
nubus
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nvdimm Merge branch 'for-4.16/nfit' into libnvdimm-for-next 2018-02-03 00:26:26 -07:00
nvme for-linus-20180204 2018-02-04 11:16:35 -08:00
nvmem
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of pci-v4.16-changes 2018-02-06 09:59:40 -08:00
opp
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oprofile
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parisc
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parport
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pci pci-v4.16-changes 2018-02-06 09:59:40 -08:00
pcmcia
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perf
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phy USB/PHY updates for 4.16-rc1 2018-02-01 09:40:49 -08:00
pinctrl This is the bulk of pin control changes for the v4.16 kernel cycle: 2018-02-02 14:22:53 -08:00
platform Driver Core updates for 4.16-rc1 2018-02-01 10:00:28 -08:00
pnp
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power power supply and reset changes for the v4.16 series 2018-01-31 12:55:31 -08:00
powercap
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pps
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ps3
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ptp
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pwm
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rapidio
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ras mm/memory_failure: Remove unused trapno from memory_failure 2018-01-23 12:17:42 -06:00
regulator Merge remote-tracking branch 'regulator/topic/tps65218' into regulator-next 2018-01-26 17:57:05 +00:00
remoteproc remoteproc updates for v4.16 2018-02-05 10:07:40 -08:00
reset
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rpmsg rpmsg updates for v4.16 2018-02-05 10:05:40 -08:00
rtc RTC for 4.16 2018-02-02 14:19:19 -08:00
s390 libnvdimm for 4.16 2018-02-06 10:41:33 -08:00
sbus pci-v4.16-changes 2018-02-06 09:59:40 -08:00
scsi for-linus-20180204 2018-02-04 11:16:35 -08:00
sfi
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sh
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siox
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slimbus
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sn
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soc ARM: SoC driver updates for 4.16 2018-02-01 16:35:31 -08:00
soundwire soundwire: Fix a signedness bug 2018-01-22 16:45:26 +01:00
spi Merge remote-tracking branch 'spi/topic/xilinx' into spi-next 2018-01-26 17:57:34 +00:00
spmi
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ssb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-01-19 22:59:33 -05:00
staging media updates for v4.16-rc1 2018-02-06 11:27:48 -08:00
target Merge branch 'for-4.16/block' of git://git.kernel.dk/linux-block 2018-01-29 11:51:49 -08:00
tc
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tee
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thermal Driver Core updates for 4.16-rc1 2018-02-01 10:00:28 -08:00
thunderbolt
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tty Driver Core updates for 4.16-rc1 2018-02-01 10:00:28 -08:00
uio Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
usb pinctrl: files should directly include apis they use 2018-02-05 09:41:54 -08:00
uwb
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vfio VFIO updates for v4.16-rc1 2018-02-01 13:18:25 -08:00
vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-01-31 14:31:10 -08:00
video pci-v4.16-changes 2018-02-06 09:59:40 -08:00
virt Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
virtio
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visorbus
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vlynq
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vme
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w1 Documentation updates for 4.16. New stuff includes refcount_t 2018-01-31 19:25:25 -08:00
watchdog
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xen dma mapping changes for Linux 4.16: 2018-01-31 11:32:27 -08:00
zorro
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Kconfig Char/Misc driver patches for 4.16-rc1 2018-02-01 10:31:17 -08:00
Makefile pci-v4.16-changes 2018-02-06 09:59:40 -08:00