Michal Hocko a1400af755 mm, proc: report PR_SET_THP_DISABLE in proc ... David Rientjes has reported that commit 1860033237 ("mm: make PR_SET_THP_DISABLE immediately active") has changed the way how we report THPable VMAs to the userspace. Their monitoring tool is triggering false alarms on PR_SET_THP_DISABLE tasks because it considers an insufficient THP usage as a memory fragmentation resp. memory pressure issue. Before the said commit each newly created VMA inherited VM_NOHUGEPAGE flag and that got exposed to the userspace via /proc/<pid>/smaps file. This implementation had its downsides as explained in the commit message but it is true that the userspace doesn't have any means to query for the process wide THP enabled/disabled status. PR_SET_THP_DISABLE is a process wide flag so it makes a lot of sense to export in the process wide context rather than per-vma. Introduce a new field to /proc/<pid>/status which export this status. If PR_SET_THP_DISABLE is used then it reports false same as when the THP is not compiled in. It doesn't consider the global THP status because we already export that information via sysfs Link: http://lkml.kernel.org/r/20181211143641.3503-4-mhocko@kernel.org Fixes: 1860033237 ("mm: make PR_SET_THP_DISABLE immediately active") Signed-off-by: Michal Hocko <mhocko@suse.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Reported-by: David Rientjes <rientjes@google.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Jan Kara <jack@suse.cz> Cc: Mike Rapoport <rppt@linux.ibm.com> Cc: Paul Oppenheimer <bepvte@gmail.com> Cc: William Kucharski <william.kucharski@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2018-12-28 12:11:50 -08:00
..
ABI	zram: writeback throttle	2018-12-28 12:11:49 -08:00
EDID	…
PCI	pci-v4.20-changes	2018-10-25 06:50:48 -07:00
RCU	doc: Fix "struction" typo in RCU memory-ordering documentation	2018-11-12 08:56:25 -08:00
accelerators	ocxl: Document new OCXL IOCTLs	2018-06-03 20:40:33 +10:00
accounting	psi: cgroup support	2018-10-26 16:26:32 -07:00
acpi	ACPI: property: graph: Update graph documentation to use generic references	2018-07-23 12:44:52 +02:00
admin-guide	selinux/stable-4.21 PR 20181224	2018-12-27 12:01:58 -08:00
aoe	…
arm	ARM: SoC device tree updates for 4.20	2018-10-29 15:05:20 -07:00
arm64	arm64 festive updates for 4.21	2018-12-25 17:41:56 -08:00
auxdisplay	…
backlight	…
block	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
blockdev	zram: writeback throttle	2018-12-28 12:11:49 -08:00
bpf	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2018-08-07 11:02:05 -07:00
bus-devices	…
cdrom	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
cgroup-v1	Merge branch 'for-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2018-10-25 17:15:46 -07:00
cma	…
connector	…
console	Documentation: corrections to console/console.txt	2018-08-10 16:09:40 -06:00
core-api	XArray: Add xa_cmpxchg_irq and xa_cmpxchg_bh	2018-12-06 08:26:17 -05:00
cpu-freq	Documentation: cpu-freq: Frequencies aren't always sorted	2018-11-07 13:29:04 +01:00
cpuidle	Documentation: admin-guide: PM: Add cpuidle document	2018-12-03 10:03:36 +01:00
crypto	crypto: skcipher - remove remnants of internal IV generators	2018-12-23 11:52:45 +08:00
dev-tools	kasan: update documentation	2018-12-28 12:11:44 -08:00
device-mapper	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
devicetree	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2018-12-27 13:53:32 -08:00
doc-guide	Documentation/sphinx: allow "functions" with no parameters	2018-06-30 07:52:42 -06:00
driver-api	docs: driver-api: Add I3C documentation	2018-11-12 10:33:49 +01:00
driver-model	gpio: Add devm_gpiod_unhinge()	2018-12-11 01:04:23 +00:00
early-userspace	initramfs: move gen_initramfs_list.sh from scripts/ to usr/	2018-08-22 23:21:44 +09:00
extcon	…
fault-injection	…
fb	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
features	MIPS: Enable IOREMAP_PROT config option for MIPS cpus	2018-11-05 10:15:28 -08:00
filesystems	mm, proc: report PR_SET_THP_DISABLE in proc	2018-12-28 12:11:50 -08:00
firmware_class	…
fmc	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
fpga	docs: fpga: add a document for FPGA Device Feature List (DFL) Framework Overview	2018-07-15 13:55:44 +02:00
gpio	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
gpu	Final changes to drm-misc-next for v4.21:	2018-12-07 11:23:05 +10:00
hid	…
hwmon	hwmon: (ina3221) Read channel input source info from DT	2018-10-10 20:37:13 -07:00
i2c	i2c: add i2c bus driver for NVIDIA GPU	2018-11-09 17:46:43 +01:00
ia64	…
ide	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
iio	…
infiniband	…
input	Revert "Input: Add the `REL_WHEEL_HI_RES` event code"	2018-11-22 08:57:44 +01:00
ioctl	drm pull for 4.20-rc1	2018-10-28 17:49:53 -07:00
isdn	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
kbuild	kbuild: remove unused cc-fullversion variable	2018-11-02 00:15:26 +09:00
kdump	…
kernel-hacking	doc:it_IT: translation for kernel-hacking	2018-07-26 16:21:09 -06:00
laptops	platform-drivers-x86 for v4.20-1	2018-11-01 08:42:21 -07:00
leds	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
lightnvm	…
livepatch	livepatch: Remove not longer valid limitations from the documentation	2018-05-24 15:37:57 +02:00
locking	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
m68k	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
maintainer	docs: Fix more broken references	2018-06-15 18:11:26 -03:00
md	…
media	media fixes for v4.20-rc8	2018-12-25 13:11:30 -08:00
memory-devices	…
mic	…
mips	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
misc-devices	pci_endpoint_test: Add 2 ioctl commands	2018-07-19 11:46:57 +01:00
mmc	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
mtd	Documentation: mtd: remove stale pxa3xx NAND controller documentation	2018-09-04 23:37:38 +02:00
namespaces	…
netlabel	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
networking	Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next	2018-12-20 18:20:26 -08:00
nfc	…
nios2	…
nvdimm	…
nvmem	Documentation: nvmem: document cell tables and lookup entries	2018-09-28 15:14:54 +02:00
openrisc	…
parisc	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
pcmcia	pcmcia: remove long deprecated pcmcia_request_exclusive_irq() function	2018-08-18 12:30:42 -07:00
perf	Documentation: perf: Add documentation for ThunderX2 PMU uncore driver	2018-12-06 12:29:47 +00:00
phy	…
platform	…
power	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
powerpc	powerpc/fadump: Reservationless firmware assisted dump	2018-12-21 11:32:49 +11:00
pps	…
process	The Compiler Attributes series	2018-11-01 18:34:46 -07:00
pti	…
ptp	…
rapidio	…
riscv	perf: riscv: Add Document for Future Porting Guide	2018-06-04 14:02:11 -07:00
s390	KVM updates for v4.20	2018-10-25 17:57:35 -07:00
scheduler	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
scsi	SCSI misc on 20181024	2018-10-25 07:40:30 -07:00
security	Merge branch 'next-keys2' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2018-11-01 15:23:59 -07:00
serial	TTY/Serial patches for 4.20-rc1	2018-10-29 10:42:20 -07:00
sh	…
sound	ALSA: doc: Brush up the old writing-an-alsa-driver	2018-10-18 10:30:01 +02:00
sparc	…
sphinx	Documentation/sphinx: allow "functions" with no parameters	2018-06-30 07:52:42 -06:00
sphinx-static	docs: improve readability for people with poorer eyesight	2018-10-07 09:16:50 -06:00
spi	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
sysctl	mm: reclaim small amounts of memory when an external fragmentation event occurs	2018-12-28 12:11:48 -08:00
target	…
thermal	…
timers	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
trace	The biggest change here is the updates to kprobes	2018-10-30 09:49:56 -07:00
translations	This was a moderately busy cycle for docs, with the usual collection of	2018-08-14 14:29:31 -07:00
usb	USB-serial updates for v4.19-rc1	2018-07-20 21:47:15 +02:00
userspace-api	x86/speculation: Add prctl() control for indirect branch speculation	2018-11-28 11:57:13 +01:00
virtual	x86/kvm/hyper-v: Introduce KVM_GET_SUPPORTED_HV_CPUID	2018-12-14 17:59:54 +01:00
vm	Merge drm/drm-next into drm-intel-next-queued	2018-11-20 13:14:08 +02:00
w1	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
watchdog	documentation: watchdog: add documentation for armada-37xx-wdt	2018-10-13 15:19:40 +02:00
wimax	…
x86	Merge branch 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-12-26 12:17:43 -08:00
xilinx	Documentation: xilinx: Add documentation for eemi APIs	2018-10-09 13:26:05 +02:00
xtensa	…
.gitignore	…
Changes	…
CodingStyle	…
DMA-API-HOWTO.txt	…
DMA-API.txt	…
DMA-ISA-LPC.txt	…
DMA-attributes.txt	…
IPMI.txt	…
IRQ-affinity.txt	…
IRQ-domain.txt	…
IRQ.txt	…
Intel-IOMMU.txt	…
Makefile	…
SAK.txt	…
SM501.txt	…
SubmittingPatches	…
atomic_bitops.txt	…
atomic_t.txt	…
bt8xxgpio.txt	…
btmrvl.txt	…
bus-virt-phys-mapping.txt	…
clearing-warn-once.txt	…
conf.py	This is a fairly typical cycle for documentation. There's some welcome	2018-10-24 18:01:11 +01:00
cpu-load.txt	…
cputopology.txt	…
crc32.txt	…
dcdbas.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	…
dell_rbu.txt	Documentation: remove stale firmware API reference	2018-05-14 16:44:41 +02:00
digsig.txt	…
docutils.conf	…
dontdiff	…
efi-stub.txt	efi_stub: update documentation on dtb= parameter	2018-09-09 14:46:44 -06:00
eisa.txt	…
flexible-arrays.txt	…
futex-requeue-pi.txt	…
gcc-plugins.txt	…
highuid.txt	…
hw_random.txt	…
hwspinlock.txt	…
index.rst	docs: tidy up TOCs and refs to license-rules.rst	2018-08-31 16:50:50 -06:00
intel_txt.txt	…
io-mapping.txt	…
io_ordering.txt	…
iostats.txt	block: Track DISCARD statistics and output them in stat and diskstat	2018-07-18 08:44:22 -06:00
irqflags-tracing.txt	…
isa.txt	…
isapnp.txt	…
kernel-per-CPU-kthreads.txt	doc: Update removal of RCU-bh/sched update machinery	2018-08-30 10:59:48 -07:00
kobject.txt	…
kprobes.txt	kprobes/Documentation: Fix various typos	2018-06-22 11:10:55 +02:00
kref.txt	…
ldm.txt	…
lockup-watchdogs.txt	…
logo.gif	…
logo.txt	…
lsm.txt	…
lzo.txt	…
mailbox.txt	…
memory-barriers.txt	locking/memory-barriers: Replace smp_cond_acquire() with smp_cond_load_acquire()	2018-10-02 10:28:05 +02:00
men-chameleon-bus.txt	…
nommu-mmap.txt	Documentation: nommu-map: Fix duplicate word typo	2018-06-26 09:01:27 -06:00
ntb.txt	…
numastat.txt	…
padata.txt	…
parport-lowlevel.txt	…
percpu-rw-semaphore.txt	…
phy.txt	…
pi-futex.txt	…
pnp.txt	…
preempt-locking.txt	Documentation: preempt-locking: Use better example	2018-10-12 11:35:47 -06:00
pwm.txt	…
rbtree.txt	…
remoteproc.txt	…
rfkill.txt	rfkill: Fix several typos in documentation	2018-06-15 13:36:08 +02:00
robust-futex-ABI.txt	…
robust-futexes.txt	…
rpmsg.txt	…
rtc.txt	…
sgi-ioc4.txt	…
siphash.txt	…
smsc_ece1099.txt	…
speculation.txt	…
static-keys.txt	…
svga.txt	…
switchtec.txt	NTB: switchtec_ntb: Update switchtec documentation with prerequisites for NTB	2018-10-11 11:28:53 -05:00
sync_file.txt	…
tee.txt	…
this_cpu_ops.txt	…
unaligned-memory-access.txt	…
vfio-mediated-device.txt	vfio/mdev: Check globally for duplicate devices	2018-06-08 10:24:27 -06:00
vfio.txt	vfio: fix documentation	2018-05-08 09:16:41 -06:00
video-output.txt	…
xillybus.txt	…
xz.txt	…
zorro.txt	…