David Rientjes 21440d7eb9 mm, thp: add new defer+madvise defrag option ... There is no thp defrag option that currently allows MADV_HUGEPAGE regions to do direct compaction and reclaim while all other thp allocations simply trigger kswapd and kcompactd in the background and fail immediately. The "defer" setting simply triggers background reclaim and compaction for all regions, regardless of MADV_HUGEPAGE, which makes it unusable for our userspace where MADV_HUGEPAGE is being used to indicate the application is willing to wait for work for thp memory to be available. The "madvise" setting will do direct compaction and reclaim for these MADV_HUGEPAGE regions, but does not trigger kswapd and kcompactd in the background for anybody else. For reasonable usage, there needs to be a mesh between the two options. This patch introduces a fifth mode, "defer+madvise", that will do direct reclaim and compaction for MADV_HUGEPAGE regions and trigger background reclaim and compaction for everybody else so that hugepages may be available in the near future. A proposal to allow direct reclaim and compaction for MADV_HUGEPAGE regions as part of the "defer" mode, making it a very powerful setting and avoids breaking userspace, was offered: http://marc.info/?t=148236612700003 This additional mode is a compromise. A second proposal to allow both "defer" and "madvise" to be selected at the same time was also offered: http://marc.info/?t=148357345300001. This is possible, but there was a concern that it might break existing userspaces the parse the output of the defrag mode, so the fifth option was introduced instead. This patch also cleans up the helper function for storing to "enabled" and "defrag" since the former supports three modes while the latter supports five and triple_flag_store() was getting unnecessarily messy. Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1701101614330.41805@chino.kir.corp.google.com Signed-off-by: David Rientjes <rientjes@google.com> Acked-by: Mel Gorman <mgorman@techsingularity.net> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Michal Hocko <mhocko@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2017-02-22 16:41:30 -08:00
..
ABI	staging/iio driver patches for 4.11-rc1	2017-02-22 12:14:01 -08:00
accounting	tools: move accounting tool from Documentation	2016-09-23 13:07:15 -06:00
acpi	ACPI / button: Remove lid_init_state=method mode	2017-01-31 17:20:45 +01:00
admin-guide	slub: make sysfs directories for memcg sub-caches optional	2017-02-22 16:41:27 -08:00
aoe
arm	ARM: SoC platform updates for v4.10	2016-12-15 15:39:02 -08:00
arm64	arm64: Work around Falkor erratum 1003	2017-02-10 11:22:12 +00:00
auxdisplay	samples: move auxdisplay example code from Documentation	2016-09-23 11:52:32 -06:00
backlight
blackfin	samples: move blackfin gptimers-example from Documentation	2016-10-10 07:12:02 -06:00
block	block: fix up io_poll documentation	2017-01-03 16:47:13 -07:00
blockdev	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
bus-devices
cdrom	cdrom: Make device operations read-only	2017-02-14 08:29:56 -07:00
cgroup-v1	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
cma
connector
console
core-api	core-api: remove an unexpected unident	2016-12-01 10:46:01 -07:00
cpu-freq	cpufreq: intel_pstate: Operation mode control from sysfs	2017-02-04 00:05:31 +01:00
cpuidle
cris
crypto	This pull contains one set of changes: a conversion of the crypto DocBook	2016-12-17 16:00:34 -08:00
dev-tools	Documentation/sparse: drop __CHECK_ENDIAN__	2016-12-16 00:13:41 +02:00
device-mapper	dm cache metadata: add "metadata2" feature	2017-02-16 13:12:47 -05:00
devicetree	TTY/Serial driver patches for 4.11-rc1	2017-02-22 12:17:25 -08:00
dmaengine	dmaengine: Documentation: Fix typo in pxa_dma.txt	2016-11-14 08:14:24 +05:30
doc-guide	docs-rst: parse-headers.pl: cleanup the documentation	2016-11-30 17:08:09 -07:00
DocBook	char/misc driver patches for 4.11-rc1	2017-02-22 11:38:22 -08:00
driver-api	driver core patches for 4.11-rc1	2017-02-22 11:44:32 -08:00
driver-model	irqdesc: Add a resource managed version of irq_alloc_descs()	2017-02-10 14:39:20 +01:00
early-userspace
EDID
extcon	extcon: int3496: Add Intel INT3496 ACPI device extcon driver	2017-01-09 10:04:11 +09:00
fault-injection
fb
features	2nd round of ARC udpates for 4.10rc1	2016-12-23 10:22:47 -08:00
filesystems	rxrpc: Change module filename to rxrpc.ko	2017-02-17 15:09:19 -05:00
firmware_class	firmware: revamp firmware documentation	2017-01-11 09:42:59 +01:00
fmc
fpga	fpga: Add scatterlist based programming	2017-02-10 15:20:44 +01:00
frv	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
gpio	pinctrl / gpio: Introduce .set_config() callback for GPIO chips	2017-01-26 15:27:37 +01:00
gpu	Main pull request for drm for 4.10 kernel	2016-12-13 09:35:09 -08:00
hid	Documentation: HID: Intel ISH HID document	2016-08-17 11:13:07 +02:00
hwmon	hwmon: Update documentation to clarify rules for the 'name' attribute	2017-01-25 06:14:36 -08:00
i2c	Merge branch 'i2c/for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2016-12-15 12:56:35 -08:00
ia64	selftests: move ia64 tests from Documentation/ia64	2016-09-20 09:58:12 -06:00
ide
iio	iio: Documentation: Correct the path used to create triggers.	2016-10-01 00:49:58 -06:00
infiniband	IB/hfi1: Document new sysfs entries for hfi1 driver	2016-10-02 08:42:19 -04:00
input	Input: ALPS - add V8 protocol documentation	2016-10-04 11:47:02 -07:00
ioctl	doc: ioctl: Add some clarifications to botching-up-ioctls	2016-09-06 06:00:22 -06:00
isdn	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
kbuild	Kconfig: Introduce the "imply" keyword	2016-11-16 09:26:33 +01:00
kdump	Documentation: kdump: Add description of enable multi-cpus support	2016-09-20 18:02:54 -06:00
laptops	platform/x86: thinkpad_acpi: Add support for X1 Yoga (2016) Tablet Mode	2016-12-13 09:29:06 -08:00
leds	leds: class: Add new optional brightness_hw_changed attribute	2017-01-29 19:59:42 +01:00
livepatch	livepatch: doc: remove the limitation for schedule() patching	2017-01-11 02:33:39 +01:00
locking	locking/ww_mutex/Documentation: Update the design document	2017-01-14 11:14:55 +01:00
m68k	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
media	media updates for v4.11-rc1	2017-02-21 16:58:32 -08:00
memory-devices
metag
mic	samples: move mic/mpssd example code from Documentation	2016-09-20 12:38:48 -06:00
mips
misc-devices	samples: move misc-devices/mei example code from Documentation	2016-09-23 11:51:43 -06:00
mmc	mmc: core: Extend sysfs with DSR register	2016-07-25 10:34:51 +02:00
mn10300
mtd	spi-nor: Add support for Intel SPI serial flash controller	2017-01-03 17:33:36 +00:00
namespaces
netlabel
networking	GTP: Add some basic documentation about drivers/net/gtp.c	2017-02-20 10:24:20 -05:00
nfc
nios2
nvdimm
nvmem
parisc
PCI	PCI changes for the v4.9 merge window:	2016-10-07 11:46:37 -07:00
pcmcia	tools: move pcmcia crc32hash tool from Documentation	2016-09-23 13:07:27 -06:00
perf	perf: add qcom l2 cache perf events driver	2017-02-08 19:32:24 +00:00
phy
platform
power	Merge branch 'pm-sleep'	2017-02-20 14:26:13 +01:00
powerpc	powerpc updates for 4.9	2016-10-07 20:19:31 -07:00
pps
prctl	selftests: move prctl tests from Documentation/prctl	2016-09-20 09:09:09 -06:00
process	Doc: Correct typo, "Introdution" => "Introduction"	2016-12-01 10:44:08 -07:00
pti
ptp	selftests: move ptp tests from Documentation/ptp	2016-09-20 09:54:38 -06:00
rapidio	rapidio/documentation/mport_cdev: add missing parameter description	2016-09-01 17:52:02 -07:00
RCU	Merge branches 'doc.2017.01.15b', 'dyntick.2017.01.23a', 'fixes.2017.01.23a', 'srcu.2017.01.25a' and 'torture.2017.01.15b' into HEAD	2017-01-25 12:56:05 -08:00
s390
scheduler	sched/Documentation/sched-rt-group: Fix incorrect example	2017-01-22 10:34:17 +01:00
scsi	Merge branch 'misc' into for-linus	2016-12-22 12:32:33 -08:00
security	This renames the (now inaccurate) CONFIG_DEBUG_RODATA and related config	2017-02-21 17:56:45 -08:00
serial	Documentation: rs485: Do not define manually the ioctl	2016-08-18 11:08:33 -06:00
sh
sound	Merge remote-tracking branch 'sound/topic/restize-docs' into sound	2016-11-18 16:19:28 -07:00
sphinx	docs: sphinx-extensions: make rstFlatTable work with docutils 0.13	2016-12-18 13:30:29 -07:00
sphinx-static	This is the documentation update pull for the 4.9 merge window.	2016-10-04 13:54:07 -07:00
spi	spi: spi-ep93xx: simplify GPIO chip selects	2017-02-16 20:10:26 +00:00
sysctl	bpf: make jited programs visible in traces	2017-02-17 13:40:05 -05:00
target
thermal	thermal: Add support for hardware-tracked trip points	2016-09-27 14:02:16 +08:00
timers	time: Remove CONFIG_TIMER_STATS	2017-02-10 11:15:08 +01:00
trace	trace-vmscan-postprocess: sync with tracepoints updates	2017-02-22 16:41:29 -08:00
translations	Documentation/sparse: drop __CHECK_ENDIAN__	2016-12-16 00:13:41 +02:00
usb	usb: gadget: uac2: add req_number as parameter	2017-01-24 11:04:21 +02:00
virtual	KVM: PPC: Book3S HV: Add userspace interfaces for POWER9 MMU	2017-01-31 19:11:47 +11:00
vm	mm, thp: add new defer+madvise defrag option	2017-02-22 16:41:30 -08:00
w1
watchdog	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
wimax
x86	efi: Get and store the secure boot status	2017-02-07 10:42:10 +01:00
xtensa	xtensa: cleanup MMU setup and kernel layout macros	2016-07-24 06:33:58 +03:00
.gitignore
00-INDEX	edac: adjust docs location at MAINTAINERS and 00-INDEX	2016-12-15 08:57:16 -02:00
bcache.txt
bt8xxgpio.txt
btmrvl.txt
bus-virt-phys-mapping.txt
cachetlb.txt
cgroup-v2.txt
Changes	docs: add back 'Documentation/Changes' file (as symlink)	2016-12-14 16:30:12 -08:00
circular-buffers.txt	Documentation: circular-buffers: use READ_ONCE()	2016-11-16 16:17:45 -07:00
clk.txt	Documentation: clk: update file names containing referenced structures	2016-08-14 12:12:36 -06:00
CodingStyle	doc: re-add CodingStyle and SubmittingPatches	2016-10-24 08:12:35 -02:00
conf.py	docs-rst: doc-guide: split the kernel-documentation.rst contents	2016-11-19 10:22:04 -07:00
cpu-hotplug.txt	Documentation: cpu-hotplug: Fix typos	2016-10-25 17:07:52 -06:00
cpu-load.txt
cputopology.txt
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt
digsig.txt
DMA-API-HOWTO.txt	Documentation: DMA-API-HOWTO: Fix a typo	2016-09-20 17:58:46 -06:00
DMA-API.txt	dma-mapping: add dma_{map,unmap}_resource	2016-09-26 22:16:41 +05:30
DMA-attributes.txt	common: DMA-mapping: add DMA_ATTR_PRIVILEGED attribute	2017-01-19 15:56:19 +00:00
dma-buf-sharing.txt
DMA-ISA-LPC.txt
docutils.conf	doc-rst: add docutils config file	2016-08-14 11:52:40 -06:00
dontdiff	Remove last traces of ikconfig.h	2016-12-14 10:54:28 +01:00
efi-stub.txt
eisa.txt
flexible-arrays.txt
futex-requeue-pi.txt
gcc-plugins.txt
highuid.txt
hw_random.txt
hwspinlock.txt
index.rst	crypto: doc - convert crypto API documentation to Sphinx	2016-12-13 16:37:54 -07:00
intel_txt.txt
Intel-IOMMU.txt
io_ordering.txt
io-mapping.txt
iostats.txt
IPMI.txt	ipmi: Update documentation	2016-11-07 12:16:06 -06:00
IRQ-affinity.txt
IRQ-domain.txt
IRQ.txt
irqflags-tracing.txt
isa.txt
isapnp.txt
kernel-doc-nano-HOWTO.txt	docs-rst: doc-guide: split the kernel-documentation.rst contents	2016-11-19 10:22:04 -07:00
kernel-per-CPU-kthreads.txt	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
kobject.txt
kprobes.txt	Documentation: kprobes: Document jprobes stack copying limitations	2016-08-15 10:19:11 -06:00
kref.txt
kselftest.txt	Doc: update kselftest.txt with details on how to run tests after install	2016-11-07 18:04:18 -07:00
ldm.txt
lockup-watchdogs.txt	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
logo.gif
logo.txt
lzo.txt
mailbox.txt
Makefile	samples: move blackfin gptimers-example from Documentation	2016-10-10 07:12:02 -06:00
Makefile.sphinx	docs-rst: fix media cleandocs target	2016-11-30 17:08:03 -07:00
md-cluster.txt
memory-barriers.txt	doc: Update control-dependencies section of memory-barriers.txt	2017-01-14 21:29:15 -08:00
memory-hotplug.txt	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
men-chameleon-bus.txt
nommu-mmap.txt
ntb.txt
numastat.txt
padata.txt
parport-lowlevel.txt
percpu-rw-semaphore.txt
phy.txt
pi-futex.txt
pinctrl.txt	pinctrl: core: Fix regression caused by delayed work for hogs	2017-01-13 16:25:17 +01:00
pnp.txt
preempt-locking.txt
printk-formats.txt
pwm.txt
rbtree.txt
remoteproc.txt	remoteproc: Split driver and consumer dereferencing	2016-10-02 22:50:21 -07:00
rfkill.txt	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
robust-futex-ABI.txt
robust-futexes.txt
rpmsg.txt
rtc.txt
SAK.txt
sgi-ioc4.txt
siphash.txt	siphash: implement HalfSipHash1-3 for hash tables	2017-01-09 13:58:57 -05:00
SM501.txt
smsc_ece1099.txt
static-keys.txt	jump_labels: Allow array initialisers	2016-09-07 09:41:11 +01:00
SubmittingPatches	doc: re-add CodingStyle and SubmittingPatches	2016-10-24 08:12:35 -02:00
svga.txt
sync_file.txt	dma-buf: Rename struct fence to dma_fence	2016-10-25 14:40:39 +02:00
this_cpu_ops.txt
unaligned-memory-access.txt	Documentation/unaligned-memory-access.txt: fix incorrect comparison operator	2016-12-27 13:08:42 -07:00
unshare.txt
vfio-mediated-device.txt	vfio-mdev: Make mdev_parent private	2016-12-30 08:13:41 -07:00
vfio.txt
video-output.txt
xillybus.txt
xz.txt
zorro.txt