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Artur Paszkiewicz c622ca543b md: don't print the same repeated messages about delayed sync operation 
This fixes a long-standing bug that caused a flood of messages like:
"md: delaying data-check of md1 until md2 has finished (they share one
or more physical units)"

It can be reproduced like this:
1. Create at least 3 raid1 arrays on a pair of disks, each on different
   partitions.
2. Request a sync operation like 'check' or 'repair' on 2 arrays by
   writing to their md/sync_action attribute files. One operation should
   start and one should be delayed and a message like the above will be
   printed.
3. Issue a write to the third array. Each write will cause 2 copies of
   the message to be printed.

This happens when wake_up(&resync_wait) is called, usually by
md_check_recovery(). Then the delayed sync thread again prints the
message and is put to sleep. This patch adds a check in md_do_sync() to
prevent printing this message more than once for the same pair of
devices.

Reported-by: Sven Koehler <sven.koehler@gmail.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=151801
Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>
2016-08-17 10:22:08 -07:00
..
accessibility
acpi Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-07-29 13:55:30 -07:00
amba
android
ata New LED class driver: 2016-07-27 14:03:52 -07:00
atm drivers: atm: nicstar: Use the correct function to free some resources 2016-07-19 11:30:26 -07:00
auxdisplay
base mm: track NR_KERNEL_STACK in KiB instead of number of stacks 2016-07-28 16:07:41 -07:00
bcma wireless-drivers-next patches for 4.8 2016-07-25 11:09:19 -07:00
block libnvdimm for 4.8 2016-07-28 17:38:16 -07:00
bluetooth Bluetooth: btmrvl: reset is_suspending flag in failure path 2016-07-18 10:13:02 +02:00
bus DeviceTree update for 4.8: 2016-07-30 11:32:01 -07:00
cdrom cdrom: support read sub-channel command in LBA format 2016-07-12 08:24:50 -07:00
char Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2016-07-29 17:38:46 -07:00
clk Merge branch 'clk-fixes' into clk-next 2016-07-21 17:30:54 -07:00
clocksource clocksource/atlas7: Convert to hotplug state machine 2016-07-15 10:41:45 +02:00
connector connector: make cn_proc explicitly non-modular 2016-07-05 11:40:47 -07:00
cpufreq Power management material for v4.8-rc1 2016-07-26 17:29:07 -07:00
cpuidle cpuidle: introduce CPU_PM_CPU_IDLE_ENTER macro for ARM{32, 64} 2016-07-21 23:29:38 +02:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-07-26 13:40:17 -07:00
dax dax: use devm_add_action_or_reset() 2016-07-06 15:14:48 -07:00
dca
devfreq PM / devfreq: exynos-bus: add missing of_node_put after calling of_parse_phandle 2016-07-06 13:11:24 +09:00
dio
dma dmaengine updates for 4.8-rc1 2016-07-28 15:45:17 -07:00
dma-buf
edac * Altera Arria10 ethernet FIFO buffer support (Thor Thayer) 2016-07-27 13:40:47 -07:00
eisa
extcon extcon: adc-jack: add suspend/resume support 2016-07-02 14:31:34 +09:00
firewire
firmware xen: features and fixes for 4.8-rc0 2016-07-27 11:35:37 -07:00
fmc
fpga
gpio This is the bulk of GPIO changes for the v4.8 kernel cycle. 2016-07-26 19:16:01 -07:00
gpu Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-07-28 12:59:05 -07:00
hid Merge branch 'for-4.8/hid-led' into for-linus 2016-07-28 10:49:23 +02:00
hsi
hv
hwmon Merge branch 'i2c/for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2016-07-27 14:19:25 -07:00
hwspinlock hwspinlock: qcom_hwspinlock: add missing of_node_put after calling of_parse_phandle 2016-07-06 12:20:34 -07:00
hwtracing Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-07-29 13:55:30 -07:00
i2c Merge branch 'i2c/for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2016-07-27 14:19:25 -07:00
ide Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide 2016-07-29 13:29:06 -07:00
idle Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-07-30 12:56:26 -07:00
iio Third set of IIO new device support, features and cleanups for the 4.8 cycle. 2016-07-14 12:05:29 +09:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-07-24 00:53:32 -04:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2016-07-27 14:30:41 -07:00
iommu DeviceTree update for 4.8: 2016-07-30 11:32:01 -07:00
ipack
irqchip Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-07-29 13:55:30 -07:00
isdn
leds Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-07-29 13:55:30 -07:00
lguest
lightnvm block: get rid of bio_rw and READA 2016-07-20 17:37:01 -06:00
macintosh
mailbox
mcb
md md: don't print the same repeated messages about delayed sync operation 2016-08-17 10:22:08 -07:00
media media updates for v4.8-rc1 2016-07-27 14:58:31 -07:00
memory DeviceTree update for 4.8: 2016-07-30 11:32:01 -07:00
memstick memstick: don't allow REQ_TYPE_BLOCK_PC requests 2016-07-20 17:38:27 -06:00
message
mfd Merge remote-tracking branches 'regulator/topic/qcom-spmi', 'regulator/topic/rn5t618', 'regulator/topic/tps65218' and 'regulator/topic/twl' into regulator-next 2016-07-20 18:02:08 +01:00
misc Merge branch 'i2c/for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2016-07-27 14:19:25 -07:00
mmc Merge branch 'for-4.8/drivers' of git://git.kernel.dk/linux-block 2016-07-26 15:37:51 -07:00
mtd Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-07-27 12:03:20 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-07-27 12:03:20 -07:00
nfc NFC 4.8 pull request 2016-07-20 23:39:36 -07:00
ntb
nubus
nvdimm libnvdimm for 4.8 2016-07-28 17:38:16 -07:00
nvme Merge branch 'for-4.8/drivers' of git://git.kernel.dk/linux-block 2016-07-26 15:37:51 -07:00
nvmem
of DeviceTree update for 4.8: 2016-07-30 11:32:01 -07:00
oprofile
parisc
parport
pci Power management material for v4.8-rc1 2016-07-26 17:29:07 -07:00
pcmcia
perf Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-07-29 13:55:30 -07:00
phy Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-07-27 12:03:20 -07:00
pinctrl This is the bulk of pin control changes for the v4.8 kernel cycle. 2016-07-28 17:06:51 -07:00
platform platform-drivers-x86 for 4.8-1 2016-07-26 17:23:08 -07:00
pnp PNP material for v4.8-rc1 2016-07-26 18:27:20 -07:00
power power supply and reset changes for the v4.8 series 2016-07-26 19:49:09 -07:00
powercap
pps pps: do not crash when failed to register 2016-07-23 10:25:54 +09:00
ps3
ptp
pwm
rapidio
ras
regulator Merge remote-tracking branches 'regulator/topic/qcom-spmi', 'regulator/topic/rn5t618', 'regulator/topic/tps65218' and 'regulator/topic/twl' into regulator-next 2016-07-20 18:02:08 +01:00
remoteproc remoteproc: qcom: hexagon: Clean up mpss validation 2016-07-14 20:11:36 -07:00
reset
rpmsg
rtc
s390 libnvdimm for 4.8 2016-07-28 17:38:16 -07:00
sbus
scsi Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2016-07-28 14:22:25 -07:00
sfi
sh
sn
soc
spi spi: Updates for v4.8 2016-07-27 14:11:43 -07:00
spmi
ssb
staging Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2016-07-29 15:54:19 -07:00
target Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-07-27 12:03:20 -07:00
tc
thermal Merge branch 'x86/urgent' into x86/cpu, to pick up dependent fix 2016-07-01 09:35:49 +02:00
thunderbolt
tty sparc: serial: sunhv: fix a double lock bug 2016-07-27 22:54:52 -07:00
uio
usb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2016-07-28 14:30:16 -07:00
uwb
vfio vfio: platform: check reset call return code during release 2016-07-19 10:54:45 -06:00
vhost tun: switch to use skb array for tx 2016-07-01 05:32:17 -04:00
video fbmon: remove unused function argument 2016-07-26 16:19:19 -07:00
virt
virtio mm: fix build warnings in <linux/compaction.h> 2016-07-26 16:19:19 -07:00
vlynq
vme
w1
watchdog
xen xen: features and fixes for 4.8-rc0 2016-07-27 11:35:37 -07:00
zorro
Kconfig
Makefile HSI changes for the v4.8 series 2016-07-27 15:18:53 -07:00