Dan Williams 956a4cd2c9 device-dax: switch to srcu, fix rcu_read_lock() vs pte allocation ... The following warning triggers with a new unit test that stresses the device-dax interface. =============================== [ ERR: suspicious RCU usage. ] 4.11.0-rc4+ #1049 Tainted: G O ------------------------------- ./include/linux/rcupdate.h:521 Illegal context switch in RCU read-side critical section! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 0 2 locks held by fio/9070: #0: (&mm->mmap_sem){++++++}, at: [<ffffffff8d0739d7>] __do_page_fault+0x167/0x4f0 #1: (rcu_read_lock){......}, at: [<ffffffffc03fbd02>] dax_dev_huge_fault+0x32/0x620 [dax] Call Trace: dump_stack+0x86/0xc3 lockdep_rcu_suspicious+0xd7/0x110 ___might_sleep+0xac/0x250 __might_sleep+0x4a/0x80 __alloc_pages_nodemask+0x23a/0x360 alloc_pages_current+0xa1/0x1f0 pte_alloc_one+0x17/0x80 __pte_alloc+0x1e/0x120 __get_locked_pte+0x1bf/0x1d0 insert_pfn.isra.70+0x3a/0x100 ? lookup_memtype+0xa6/0xd0 vm_insert_mixed+0x64/0x90 dax_dev_huge_fault+0x520/0x620 [dax] ? dax_dev_huge_fault+0x32/0x620 [dax] dax_dev_fault+0x10/0x20 [dax] __do_fault+0x1e/0x140 __handle_mm_fault+0x9af/0x10d0 handle_mm_fault+0x16d/0x370 ? handle_mm_fault+0x47/0x370 __do_page_fault+0x28c/0x4f0 trace_do_page_fault+0x58/0x2a0 do_async_page_fault+0x1a/0xa0 async_page_fault+0x28/0x30 Inserting a page table entry may trigger an allocation while we are holding a read lock to keep the device instance alive for the duration of the fault. Use srcu for this keep-alive protection. Fixes: dee4107924 ("/dev/dax, core: file operations and dax-mmap") Cc: <stable@vger.kernel.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>		2017-04-12 13:45:18 -07:00
..
accessibility	…
acpi	acpi, nfit, libnvdimm: fix interleave set cookie calculation (64-bit comparison)	2017-03-27 21:53:38 -07:00
amba	…
android	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>	2017-03-02 08:42:29 +01:00
ata	ahci: qoriq: correct the sata ecc setting error	2017-03-09 11:55:23 -05:00
atm	sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>	2017-03-02 08:42:32 +01:00
auxdisplay	auxdisplay: img-ascii-lcd: add missing sentinel entry in img_ascii_lcd_matches	2017-03-16 16:59:55 +09:00
base	drivers core: remove assert_held_device_hotplug()	2017-03-16 16:56:19 -07:00
bcma	…
block	A fix for the recently discovered misdirected requests bug present in	2017-03-10 11:05:47 -08:00
bluetooth	Bluetooth: btqcomsmd: fix compile-test dependency	2017-03-22 19:22:04 -07:00
bus	…
cdrom	…
char	Char/Misc driver fixes for 4.11-rc4	2017-03-26 11:15:54 -07:00
clk	Allwinner clock fixes for 4.11	2017-03-23 16:08:46 -07:00
clocksource	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-03-17 13:13:35 -07:00
connector	…
cpufreq	Merge branches 'pm-cpufreq-fixes', 'pm-cpufreq-sched-fixes' and 'intel_pstate-fixes'	2017-03-24 00:43:26 +01:00
cpuidle	cpuidle: Validate cpu_dev in cpuidle_add_sysfs()	2017-03-21 22:26:37 +01:00
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2017-03-24 14:11:36 -07:00
dax	device-dax: switch to srcu, fix rcu_read_lock() vs pte allocation	2017-04-12 13:45:18 -07:00
dca	…
devfreq	scripts/spelling.txt: add "followings" pattern and fix typo instances	2017-02-27 18:43:47 -08:00
dio	…
dma	sched/headers: Prepare to move the get_task_struct()/put_task_struct() and related APIs from <linux/sched.h> to <linux/sched/task.h>	2017-03-02 08:42:40 +01:00
dma-buf	sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>	2017-03-02 08:42:32 +01:00
edac	…
eisa	…
extcon	extcon: int3496: Set the id pin to direction-input if necessary	2017-03-22 18:29:48 +09:00
firewire	Merge branch 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax	2017-02-28 20:29:41 -08:00
firmware	Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-03-07 14:25:48 -08:00
fmc	…
fpga	…
fsi	…
gpio	gpio:mcp23s08 Fixed missing interrupts	2017-03-17 09:20:28 +01:00
gpu	Merge branch 'drm-fixes-4.11' of git://people.freedesktop.org/~agd5f/linux into drm-fixes	2017-03-24 11:05:06 +10:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid	2017-03-21 13:07:18 -07:00
hsi	sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>	2017-03-02 08:42:32 +01:00
hv	Drivers: hv: vmbus: Don't leak memory when a channel is rescinded	2017-03-16 16:42:33 +09:00
hwmon	hwmon: (asus_atk0110) fix uninitialized data access	2017-03-23 12:01:57 -07:00
hwspinlock	…
hwtracing	intel_th: pci: Add Gemini Lake support	2017-03-15 14:55:18 +02:00
i2c	Revert "i2c: copy device properties when using i2c_register_board_info()"	2017-03-09 16:41:48 +01:00
ide	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>	2017-03-02 08:42:36 +01:00
idle	Power management turbostat utility updates for v4.11-rc1	2017-03-02 17:41:27 -08:00
iio	iio: imu: st_lsm6dsx: fix FIFO_CTRL2 overwrite during watermark configuration	2017-03-19 10:44:42 +00:00
infiniband	IB/qib: fix false-postive maybe-uninitialized warning	2017-03-24 22:44:29 -04:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2017-03-23 19:51:06 -07:00
iommu	Merge branch 'for-joerg/arm-smmu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into iommu/fixes	2017-03-22 23:59:56 +01:00
ipack	…
irqchip	irqchip/irqdomain updates for 4.11-rc2	2017-03-09 12:06:41 +01:00
isdn	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-03-14 21:31:23 -07:00
leds	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/loadavg.h>	2017-03-02 08:42:27 +01:00
lguest	sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>	2017-03-02 08:42:32 +01:00
lightnvm	…
macintosh	powerpc/pmac: Fix crash in dma-mapping.h with NULL dma_ops	2017-03-10 14:17:23 +11:00
mailbox	sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>	2017-03-02 08:42:32 +01:00
mcb	…
md	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md	2017-03-16 11:43:48 -07:00
media	media fixes for v4.11-rc4	2017-03-24 13:34:16 -07:00
memory	Linux 4.11-rc1	2017-03-06 08:37:53 -08:00
memstick	…
message	…
mfd	…
misc	Char/Misc driver fixes for 4.11-rc4	2017-03-26 11:15:54 -07:00
mmc	mmc: sdhci-pci: Do not disable interrupts in sdhci_intel_set_power	2017-03-23 09:24:42 +01:00
mtd	scripts/spelling.txt: add "disble(d)" pattern and fix typo instances	2017-03-09 17:01:09 -08:00
net	net:ethernet:aquantia: Fix for RX checksum offload.	2017-03-22 19:40:52 -07:00
nfc	scripts/spelling.txt: add "omited" pattern and fix typo instances	2017-02-27 18:43:47 -08:00
ntb	…
nubus	…
nvdimm	libnvdimm: band aid btt vs clear poison locking	2017-04-10 17:21:45 -07:00
nvme	nvme-loop: handle cpu unplug when re-establishing the controller	2017-03-21 18:38:46 +02:00
nvmem	…
of	…
oprofile	sched/headers: Prepare to move the get_task_struct()/put_task_struct() and related APIs from <linux/sched.h> to <linux/sched/task.h>	2017-03-02 08:42:40 +01:00
parisc	Merge branch 'parisc-4.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux	2017-03-03 16:20:06 -08:00
parport	parport: fix attempt to write duplicate procfiles	2017-03-16 17:32:21 +09:00
pci	PCI/ASPM: Always set link->downstream to avoid NULL dereference on remove	2017-03-07 14:23:30 -06:00
pcmcia	…
perf	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>	2017-03-02 08:42:27 +01:00
phy	phy: qcom-usb-hs: Add depends on EXTCON	2017-03-09 15:29:57 +05:30
pinctrl	pinctrl: uniphier: change pin names of aio/xirq for LD11	2017-03-06 14:38:05 +01:00
platform	platform-drivers-x86 for v4.11-2	2017-03-13 13:23:43 -07:00
pnp	…
power	scripts/spelling.txt: add "intialization" pattern and fix typo instances	2017-02-27 18:43:47 -08:00
powercap	…
pps	…
ps3	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>	2017-03-02 08:42:29 +01:00
ptp	…
pwm	pwm: Changes for v4.11-rc1	2017-03-01 09:46:02 -08:00
rapidio	rapidio: use get_user_pages_unlocked()	2017-02-27 18:43:45 -08:00
ras	…
regulator	…
remoteproc	remoteproc: qcom: fix QCOM_SMD dependencies	2017-03-20 14:45:44 -07:00
reset	…
rpmsg	virtio, vhost: optimizations, fixes	2017-03-02 13:53:13 -08:00
rtc	sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>	2017-03-02 08:42:32 +01:00
s390	Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-03-03 10:16:38 -08:00
sbus	…
scsi	SCSI fixes on 20170321	2017-03-21 13:10:17 -07:00
sfi	…
sh	…
sn	…
soc	sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>	2017-03-02 08:42:32 +01:00
spi	sched/headers: Prepare for new header dependencies before moving code to <uapi/linux/sched/types.h>	2017-03-02 08:42:27 +01:00
spmi	…
ssb	…
staging	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-03-14 21:31:23 -07:00
target	tcmu: Convert cmd_time_out into backend device attribute	2017-03-18 16:32:30 -07:00
tc	…
thermal	sched/headers: Prepare for new header dependencies before moving code to <uapi/linux/sched/types.h>	2017-03-02 08:42:27 +01:00
thunderbolt	…
tty	TTY/Serial driver fixes for 4.11-rc4	2017-03-26 11:03:42 -07:00
uio	sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>	2017-03-02 08:42:32 +01:00
usb	USB-serial fixes for v4.11-rc4	2017-03-23 22:07:22 +01:00
uwb	uwb: i1480-dfu: fix NULL-deref at probe	2017-03-14 17:07:31 +08:00
vfio	VFIO fixes for v4.11-rc4	2017-03-24 14:39:36 -07:00
vhost	vhost-vsock: add pkt cancel capability	2017-03-21 14:41:46 -07:00
video	sched/headers: Remove the <linux/mm_types.h> dependency from <linux/sched.h>	2017-03-03 01:45:16 +01:00
virt	…
virtio	Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-03-03 10:16:38 -08:00
vlynq	…
vme	…
w1	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>	2017-03-02 08:42:29 +01:00
watchdog	watchdog: retu: restore MFD dependency	2017-03-01 06:15:10 -08:00
xen	xen/acpi: upload PM state from init-domain to Xen	2017-03-23 12:00:02 -04:00
zorro	…
Kconfig	…
Makefile	…