Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Guoqing Jiang e820d55cb9 md: fix raid10 hang issue caused by barrier ... When both regular IO and resync IO happen at the same time, and if we also need to split regular. Then we can see tasks hang due to barrier. 1. resync thread [ 1463.757205] INFO: task md1_resync:5215 blocked for more than 480 seconds. [ 1463.757207] Not tainted 4.19.5-1-default #1 [ 1463.757209] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1463.757212] md1_resync D 0 5215 2 0x80000000 [ 1463.757216] Call Trace: [ 1463.757223] ? __schedule+0x29a/0x880 [ 1463.757231] ? raise_barrier+0x8d/0x140 [raid10] [ 1463.757236] schedule+0x78/0x110 [ 1463.757243] raise_barrier+0x8d/0x140 [raid10] [ 1463.757248] ? wait_woken+0x80/0x80 [ 1463.757257] raid10_sync_request+0x1f6/0x1e30 [raid10] [ 1463.757265] ? _raw_spin_unlock_irq+0x22/0x40 [ 1463.757284] ? is_mddev_idle+0x125/0x137 [md_mod] [ 1463.757302] md_do_sync.cold.78+0x404/0x969 [md_mod] [ 1463.757311] ? wait_woken+0x80/0x80 [ 1463.757336] ? md_rdev_init+0xb0/0xb0 [md_mod] [ 1463.757351] md_thread+0xe9/0x140 [md_mod] [ 1463.757358] ? _raw_spin_unlock_irqrestore+0x2e/0x60 [ 1463.757364] ? __kthread_parkme+0x4c/0x70 [ 1463.757369] kthread+0x112/0x130 [ 1463.757374] ? kthread_create_worker_on_cpu+0x40/0x40 [ 1463.757380] ret_from_fork+0x3a/0x50 2. regular IO [ 1463.760679] INFO: task kworker/0:8:5367 blocked for more than 480 seconds. [ 1463.760683] Not tainted 4.19.5-1-default #1 [ 1463.760684] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1463.760687] kworker/0:8 D 0 5367 2 0x80000000 [ 1463.760718] Workqueue: md submit_flushes [md_mod] [ 1463.760721] Call Trace: [ 1463.760731] ? __schedule+0x29a/0x880 [ 1463.760741] ? wait_barrier+0xdd/0x170 [raid10] [ 1463.760746] schedule+0x78/0x110 [ 1463.760753] wait_barrier+0xdd/0x170 [raid10] [ 1463.760761] ? wait_woken+0x80/0x80 [ 1463.760768] raid10_write_request+0xf2/0x900 [raid10] [ 1463.760774] ? wait_woken+0x80/0x80 [ 1463.760778] ? mempool_alloc+0x55/0x160 [ 1463.760795] ? md_write_start+0xa9/0x270 [md_mod] [ 1463.760801] ? try_to_wake_up+0x44/0x470 [ 1463.760810] raid10_make_request+0xc1/0x120 [raid10] [ 1463.760816] ? wait_woken+0x80/0x80 [ 1463.760831] md_handle_request+0x121/0x190 [md_mod] [ 1463.760851] md_make_request+0x78/0x190 [md_mod] [ 1463.760860] generic_make_request+0x1c6/0x470 [ 1463.760870] raid10_write_request+0x77a/0x900 [raid10] [ 1463.760875] ? wait_woken+0x80/0x80 [ 1463.760879] ? mempool_alloc+0x55/0x160 [ 1463.760895] ? md_write_start+0xa9/0x270 [md_mod] [ 1463.760904] raid10_make_request+0xc1/0x120 [raid10] [ 1463.760910] ? wait_woken+0x80/0x80 [ 1463.760926] md_handle_request+0x121/0x190 [md_mod] [ 1463.760931] ? _raw_spin_unlock_irq+0x22/0x40 [ 1463.760936] ? finish_task_switch+0x74/0x260 [ 1463.760954] submit_flushes+0x21/0x40 [md_mod] So resync io is waiting for regular write io to complete to decrease nr_pending (conf->barrier++ is called before waiting). The regular write io splits another bio after call wait_barrier which call nr_pending++, then the splitted bio would continue with raid10_write_request -> wait_barrier, so the splitted bio has to wait for barrier to be zero, then deadlock happens as follows. resync io regular io raise_barrier wait_barrier generic_make_request wait_barrier To resolve the issue, we need to call allow_barrier to decrease nr_pending before generic_make_request since regular IO is not issued to underlying devices, and wait_barrier is called again to ensure no internal IO happening. Fixes: fc9977dd06 ("md/raid10: simplify the splitting of requests.") Reported-and-tested-by: Siniša Bandin <sinisa@4net.rs> Signed-off-by: Guoqing Jiang <gqjiang@suse.com> Signed-off-by: Shaohua Li <shli@fb.com>		2018-12-20 08:53:24 -08:00
..
accessibility
acpi	libnvdimm fixes 4.20-rc6	2018-12-09 09:46:54 -08:00
amba
android	binder: fix race that allows malicious free of live buffer	2018-11-26 20:01:47 +01:00
ata	libata: whitelist all SAMSUNG MZ7KM* solid-state disks	2018-12-03 12:54:39 -07:00
atm	firestream: fix spelling mistake: "Inititing" -> "Initializing"	2018-11-27 15:32:06 -08:00
auxdisplay	The Compiler Attributes series	2018-11-01 18:34:46 -07:00
base	devres: Align data[] to ARCH_KMALLOC_MINALIGN	2018-11-11 11:40:04 -08:00
bcma
block	for-linus-20181115	2018-11-16 09:31:59 -06:00
bluetooth	Merge branch 'work.tty-ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-10-24 14:43:41 +01:00
bus	ARM: SoC driver updates for 4.17	2018-10-29 15:16:01 -07:00
cdrom	gdrom: fix mistake in assignment of error	2018-10-25 11:17:40 -06:00
char	RTC for 4.20	2018-10-27 09:24:24 -07:00
clk	clk: qcom: qcs404: Fix gpll0_out_main parent	2018-12-10 11:31:30 -08:00
clocksource	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-11-11 16:41:50 -06:00
connector
cpufreq	cpufreq: ti-cpufreq: Only register platform_device when supported	2018-11-19 11:26:06 +01:00
cpuidle	ARM: cpuidle: Convert to use cpuidle_register|unregister()	2018-11-08 18:53:00 +01:00
crypto	crypto/chelsio/chtls: send/recv window update	2018-12-14 13:40:42 -08:00
dax
dca
devfreq
dio
dma	dmaengine: dw: Fix FIFO size for Intel Merrifield	2018-12-06 22:53:05 +05:30
dma-buf	udmabuf: set read/write flag when exporting	2018-11-16 08:50:53 +01:00
edac	* skx_edac: Address translation for NVDIMMs (Tony Luck and Qiuxu Zhuo)	2018-11-02 11:17:22 -07:00
eisa
extcon
firewire
firmware	efi: Prevent GICv3 WARN() by mapping the memreserve table before first use	2018-11-27 13:50:20 +01:00
fmc
fpga
fsi	fsi: fsi-scom.c: Remove duplicate header	2018-11-26 10:13:04 +11:00
gnss	gnss: sirf: fix activation retry handling	2018-12-06 17:22:23 +01:00
gpio	ARM: SoC fixes	2018-12-02 12:19:44 -08:00
gpu	Merge branch 'vmwgfx-fixes-4.20' of git://people.freedesktop.org/~thomash/linux into drm-fixes	2018-12-14 05:37:44 +10:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid	2018-12-10 11:04:41 -08:00
hsi
hv	hyperv-fixes-4.20-rc6	2018-12-14 15:36:56 +01:00
hwmon	hwmon: (w83795) temp4_type has writable permission	2018-11-18 14:34:56 -08:00
hwspinlock
hwtracing
i2c	i2c: uniphier-f: fix violation of tLOW requirement for Fast-mode	2018-12-06 23:14:59 +01:00
ide	ide: Change to use DEFINE_SHOW_ATTRIBUTE macro	2018-12-02 22:09:09 -08:00
idle	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-10-23 13:32:18 +01:00
iio	iio/hid-sensors: Fix IIO_CHAN_INFO_RAW returning wrong values for signed numbers	2018-11-16 11:42:12 +00:00
infiniband	IB/core: Fix oops in netdev_next_upper_dev_rcu()	2018-12-12 12:14:49 -05:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2018-12-04 08:47:04 -08:00
iommu	iommu/vt-d: Use memunmap to free memremap	2018-11-22 17:02:21 +01:00
ipack
irqchip	irqchip/irq-mvebu-sei: Fix a NULL vs IS_ERR() bug in probe function	2018-11-01 12:38:48 +01:00
isdn	Merge branch 'work.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-11-01 19:58:52 -07:00
leds	LED fixes for 4.20-rc2	2018-11-08 17:49:04 -06:00
lightnvm
macintosh	memblock: stop using implicit alignment to SMP_CACHE_BYTES	2018-10-31 08:54:16 -07:00
mailbox	- Convert print users to use the %pOFn format specifier	2018-10-29 10:30:44 -07:00
mcb
md	md: fix raid10 hang issue caused by barrier	2018-12-20 08:53:24 -08:00
media	media: Add a Kconfig option for the Request API	2018-12-05 13:07:43 -05:00
memory
memstick
message
mfd	Revert "mfd: cros_ec: Use devm_kzalloc for private data"	2018-12-05 09:59:38 +00:00
misc	misc: mic/scif: fix copy-paste error in scif_create_remote_lookup	2018-11-27 09:00:38 +01:00
mmc	mmc: core: Use a minimum 1600ms timeout when enabling CACHE ctrl	2018-12-17 08:59:42 +01:00
mtd	mtd: nand: Fix memory allocation in nanddev_bbt_init()	2018-11-28 15:41:50 +01:00
mux	This is the bulk of GPIO changes for the v4.20 series:	2018-10-23 08:45:05 +01:00
net	net: mvpp2: fix the phylink mode validation	2018-12-19 16:38:35 -08:00
nfc	NFC: nfcmrvl_uart: fix OF child-node lookup	2018-10-23 13:28:53 -05:00
ntb	ntb: idt: Alter the driver info comments	2018-11-01 10:33:12 -04:00
nubus
nvdimm	libnvdimm, pfn: Pad pfn namespaces relative to other regions	2018-12-05 14:16:12 -08:00
nvme	nvmet-rdma: fix response use after free	2018-12-07 07:11:11 -08:00
nvmem	nvmem: core: fix regression in of_nvmem_cell_get()	2018-11-11 09:15:29 -08:00
of	Devicetree fixes for 4.20-rc:	2018-11-09 16:41:58 -06:00
opp	OPP: Fix parsing of multiple phandles in "operating-points-v2" property	2018-11-23 10:47:21 +05:30
oprofile
parisc
parport
pci	PCI/AER: Queue one GHES event, not several uninitialized ones	2018-12-14 11:29:37 -06:00
pcmcia	powerpc updates for 4.20	2018-10-26 14:36:21 -07:00
perf	arm64 updates for 4.20:	2018-10-22 17:30:06 +01:00
phy	phy: qcom-qusb2: Fix HSTX_TRIM tuning with fused value for SDM845	2018-11-21 13:13:58 +05:30
pinctrl	pinctrl: sunxi: a83t: Fix IRQ offset typo for PH11	2018-12-07 13:32:19 +01:00
platform	platform-drivers-x86 for v4.20-1	2018-11-01 08:42:21 -07:00
pnp
power	Devicetree updates for 4.20:	2018-10-26 12:09:58 -07:00
powercap	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-10-23 13:32:18 +01:00
pps
ps3
ptp	ptp: drop redundant kasprintf() to create worker name	2018-10-28 19:20:06 -07:00
pwm
rapidio
ras
regulator	regulator: Regulator updates for next release	2018-10-23 01:54:44 +01:00
remoteproc	remoteproc: qcom: q6v5-mss: Register segments/dumpfn for coredump	2018-10-19 12:54:03 -07:00
reset	ARM: SoC driver updates for 4.17	2018-10-29 15:16:01 -07:00
rpmsg
rtc	Staging and IIO driver fixes for 4.20-rc5	2018-11-30 12:23:44 -08:00
s390	virtio/s390: fix race in ccw_io_helper()	2018-12-06 14:22:35 -05:00
sbus	drivers/sbus/char: add of_node_put()	2018-12-02 20:55:23 -08:00
scsi	SCSI fixes on 20181218	2018-12-18 09:38:34 -08:00
sfi	mm: remove include/linux/bootmem.h	2018-10-31 08:54:16 -07:00
sh
siox
slimbus	slimbus: ngd: remove unnecessary check	2018-11-07 14:59:28 +01:00
sn
soc	soc: ti: QMSS: Fix usage of irq_set_affinity_hint	2018-11-02 11:22:09 -07:00
soundwire
spi	spi: Fixes for v4.20	2018-11-28 08:33:55 -08:00
spmi
ssb
staging	media fixes for v4.20-rc7	2018-12-12 18:24:32 -08:00
target	scsi: target/core: Avoid that a kernel oops is triggered when COMPARE AND WRITE fails	2018-11-05 22:16:00 -05:00
tc
tee
thermal	thermal: stm32: Fix stm_thermal_read_factory_settings	2018-12-10 20:15:28 -08:00
thunderbolt	thunderbolt: Prevent root port runtime suspend during NVM upgrade	2018-11-26 20:38:49 +01:00
tty	Revert "serial: 8250: Fix clearing FIFOs in RS485 mode again"	2018-12-17 16:18:29 +01:00
uio	uio_hv_generic: set callbacks on open	2018-12-11 14:23:17 +01:00
usb	USB: xhci: fix 'broken_suspend' placement in struct xchi_hcd	2018-12-17 16:01:02 +01:00
uwb
vfio	VFIO updates for v4.20	2018-10-31 11:01:38 -07:00
vhost	Revert "net: vhost: lock the vqs one by one"	2018-12-12 21:56:20 -08:00
video	backlight: pwm_bl: Fix brightness levels for non-DT case.	2018-12-10 15:37:47 +00:00
virt
virtio	virtio-balloon: VIRTIO_BALLOON_F_PAGE_POISON	2018-10-24 20:57:55 -04:00
visorbus
vlynq
vme
w1
watchdog	watchdog: ts4800: release syscon device node in ts4800_wdt_probe()	2018-10-22 10:16:28 +02:00
xen	xen: fixes for 4.20-rc5	2018-12-02 12:15:55 -08:00
zorro
Kconfig
Makefile