Vitaly Kuznetsov 31bc3858ea memory-hotplug: add automatic onlining policy for the newly added memory ... Currently, all newly added memory blocks remain in 'offline' state unless someone onlines them, some linux distributions carry special udev rules like: SUBSYSTEM=="memory", ACTION=="add", ATTR{state}=="offline", ATTR{state}="online" to make this happen automatically. This is not a great solution for virtual machines where memory hotplug is being used to address high memory pressure situations as such onlining is slow and a userspace process doing this (udev) has a chance of being killed by the OOM killer as it will probably require to allocate some memory. Introduce default policy for the newly added memory blocks in /sys/devices/system/memory/auto_online_blocks file with two possible values: "offline" which preserves the current behavior and "online" which causes all newly added memory blocks to go online as soon as they're added. The default is "offline". Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Daniel Kiper <daniel.kiper@oracle.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Tang Chen <tangchen@cn.fujitsu.com> Cc: David Vrabel <david.vrabel@citrix.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Xishi Qiu <qiuxishi@huawei.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Igor Mammedov <imammedo@redhat.com> Cc: Kay Sievers <kay@vrfy.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2016-03-15 16:55:16 -07:00
..
ABI	Initial roundup of 4.5 merge window patches	2016-01-23 18:45:06 -08:00
accounting	Documentation-getdelays: Apply a recommendation from "checkpatch.pl" in main()	2015-12-24 07:22:32 -07:00
acpi
aoe
arm	ARM: SoC multiplatform code changes for v4.5	2016-01-20 18:03:56 -08:00
arm64	arm64: Documentation: add list of software workarounds for errata	2015-12-11 17:33:21 +00:00
auxdisplay
backlight
blackfin
block	A relatively boring cycle in the docs tree. There's a few kernel-doc	2016-01-17 11:55:07 -08:00
blockdev
bus-devices
cdrom
cgroup-v1	cgroup: rename cgroup documentations	2016-01-11 23:14:51 -05:00
cma
connector
console
cpu-freq	Documentation: cpufreq: intel_pstate: enhance documentation	2016-01-05 13:47:37 +01:00
cpuidle
cris
crypto
development-process
device-mapper	dm verity: add ignore_zero_blocks feature	2015-12-10 10:39:03 -05:00
devicetree	ARM: OMAP2+: critical DRA7xx fix for v4.5-rc	2016-03-09 14:15:31 -08:00
dmaengine	Merge branch 'topic/async' into for-linus	2016-01-06 15:17:47 +05:30
DocBook	[media] media.h: get rid of MEDIA_ENT_F_CONN_TEST	2016-02-16 09:15:23 -02:00
driver-model
dvb	[media] use https://linuxtv.org for LinuxTV URLs	2015-12-04 10:38:59 -02:00
early-userspace
EDID
extcon
fault-injection	net: Add support for CHANGEUPPER notifier error injection	2015-12-03 11:49:23 -05:00
fb
features	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
filesystems	efi: Make efivarfs entries immutable by default	2016-02-10 16:25:52 +00:00
firmware_class
fmc
fpga
frv
gpio	Doc: gpio: Fix typos in Documentation/gpio	2015-11-20 16:51:16 -07:00
hid
hwmon	hwmon: (pmbus) Add client driver for LTC3815	2015-12-18 08:20:59 -08:00
i2c	i2c: i801: add Intel Lewisburg device IDs	2015-11-20 16:22:21 +01:00
ia64
ide
iio	iio: Documentation: Add IIO configfs documentation	2015-12-03 18:19:28 +00:00
infiniband	IB: remove in-kernel support for memory windows	2015-12-23 14:29:04 -05:00
input
ioctl	Doc: ioctl: Fix typos in Documentation/ioctl	2015-11-20 16:52:50 -07:00
isdn
ja_JP	Documentation: translations: update linux cross reference link	2016-01-11 18:26:58 -07:00
kbuild
kdump
ko_KR	Documentation: translations: update linux cross reference link	2016-01-11 18:26:58 -07:00
laptops
leds	Documentation: leds: Add description of brightness setting API	2016-01-04 09:57:31 +01:00
locking
m68k
memory-devices
metag
mic
mips
misc-devices
mmc
mn10300
mtd	Documentation: mtd: improve nand_ecc.txt for readability and correctness	2015-11-17 17:05:14 -08:00
namespaces
netlabel
networking	net: change tcp_syn_retries documentation	2016-01-20 18:55:08 -08:00
nfc
nios2
nvdimm	libnvdimm: documentation clarifications	2015-11-12 09:55:23 -08:00
nvmem
parisc
PCI
pcmcia
phy
platform
power	Merge branches 'pm-pci' and 'pm-core'	2016-01-12 01:10:52 +01:00
powerpc
pps
prctl
pti
ptp
rapidio
RCU	documentation: Update RCU requirements based on expedited changes	2015-12-05 12:34:32 -08:00
s390	s390/zcore: remove /sys/kernel/debug/zcore/mem	2015-11-27 09:24:12 +01:00
scheduler
scsi
security	keys, trusted: seal with a TPM2 authorization policy	2015-12-20 15:27:13 +02:00
serial
sh
sound	ASoC: img: Add documentation for SPDIF in controls	2015-11-16 10:06:58 +00:00
spi	spi: tools: move spidev_test metadata	2015-11-30 12:14:12 +00:00
sysctl	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-03-14 19:14:06 -07:00
target
thermal	thermal: add description for integral_cutoff unit	2016-01-14 13:29:08 -07:00
timers	hpet: Drop stale URLs	2016-02-17 09:39:56 +01:00
tpm
trace	x86, tracing, perf: Add trace point for MSR accesses	2015-12-06 12:56:10 +01:00
usb	The chipidea changes for v4.5-rc1	2015-12-26 16:59:14 -08:00
vDSO
video4linux	[media] media framework: rename pads init function to media_entity_pads_init()	2016-01-11 12:19:03 -02:00
virtual	KVM: MMU: fix ept=0/pte.u=1/pte.w=0/CR0.WP=0/CR4.SMEP=1/EFER.NX=0 combo	2016-03-10 11:26:07 +01:00
vm	mm, page_owner: convert page_owner_inited to static key	2016-03-15 16:55:16 -07:00
w1
watchdog	Add sun4v_wdt watchdog driver	2016-01-31 11:06:24 -08:00
wimax
x86	x86/mm: Expand the exception table logic to allow new handling options	2016-02-18 09:21:46 +01:00
xtensa
zh_CN	[media] media framework: rename pads init function to media_entity_pads_init()	2016-01-11 12:19:03 -02:00
00-INDEX
adding-syscalls.txt
applying-patches.txt
assoc_array.txt
atomic_ops.txt
bad_memory.txt
basic_profiling.txt
bcache.txt
binfmt_misc.txt
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
BUG-HUNTING
bus-virt-phys-mapping.txt
cachetlb.txt
cgroup-v2.txt	Merge branch 'for-4.5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2016-02-10 11:36:19 -08:00
Changes
circular-buffers.txt
clk.txt
coccinelle.txt
CodeOfConflict
CodingStyle	Documentation: fix typo in CodingStyle	2016-01-11 18:18:16 -07:00
cpu-hotplug.txt	Documentation: cpu-hotplug: Fix sysfs mount instructions	2015-12-10 11:35:30 -07:00
cpu-load.txt
cputopology.txt
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt
devices.txt
digsig.txt
DMA-API-HOWTO.txt	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
DMA-API.txt	DMA-API: fix confusing sentence in Documentation/DMA-API.txt	2016-01-11 18:29:00 -07:00
DMA-attributes.txt
dma-buf-sharing.txt
DMA-ISA-LPC.txt
dontdiff
dynamic-debug-howto.txt
edac.txt	EDAC: Remove references to bluesmoke.sourceforge.net	2015-11-26 14:46:06 +01:00
efi-stub.txt
eisa.txt
email-clients.txt	A few more documentation patches that wandered in and have no reason to	2015-11-13 09:19:05 -08:00
flexible-arrays.txt
futex-requeue-pi.txt
gcov.txt
gdb-kernel-debugging.txt
highuid.txt
HOWTO	Documentation: HOWTO: update code cross reference link	2015-12-10 11:19:35 -07:00
hsi.txt
hw_random.txt
hwspinlock.txt
init.txt
initrd.txt
Intel-IOMMU.txt	iommu/vt-d: Fix link to Intel IOMMU Specification	2016-01-29 12:32:12 +01:00
intel_txt.txt
io-mapping.txt
io_ordering.txt
iostats.txt
IPMI.txt	ipmi watchdog : add panic_wdt_timeout parameter	2015-11-16 06:28:43 -06:00
IRQ-affinity.txt
IRQ-domain.txt
IRQ.txt
irqflags-tracing.txt
isapnp.txt
java.txt
kasan.txt
kernel-doc-nano-HOWTO.txt
kernel-docs.txt	Documentation: translations: update linux cross reference link	2016-01-11 18:26:58 -07:00
kernel-parameters.txt	mm/page_poison.c: enable PAGE_POISONING as a separate option	2016-03-15 16:55:16 -07:00
kernel-per-CPU-kthreads.txt	irq_poll: make blk-iopoll available outside the block layer	2015-12-11 11:52:24 -08:00
kmemcheck.txt
kmemleak.txt
kobject.txt
kprobes.txt
kref.txt
kselftest.txt
ldm.txt
local_ops.txt
lockup-watchdogs.txt
logo.gif
logo.txt
lzo.txt
magic-number.txt
mailbox.txt
Makefile	spi: Move spi code from Documentation to tools	2015-11-23 14:54:01 +00:00
ManagementStyle
md-cluster.txt	md-cluster: update the documentation	2016-01-06 11:39:06 +11:00
md.txt
memory-barriers.txt	virtio: barrier rework+fixes	2016-01-18 16:44:24 -08:00
memory-hotplug.txt	memory-hotplug: add automatic onlining policy for the newly added memory	2016-03-15 16:55:16 -07:00
men-chameleon-bus.txt
module-signing.txt
mono.txt
nommu-mmap.txt
ntb.txt
numastat.txt
oops-tracing.txt
padata.txt
parport-lowlevel.txt
parport.txt
percpu-rw-semaphore.txt
phy.txt
pi-futex.txt
pinctrl.txt
pnp.txt
preempt-locking.txt
printk-formats.txt	mm, printk: introduce new format string for flags	2016-03-15 16:55:16 -07:00
pwm.txt
ramoops.txt
rbtree.txt
remoteproc.txt
rfkill.txt
robust-futex-ABI.txt
robust-futexes.txt
rpmsg.txt
rtc.txt
SAK.txt
SecurityBugs
serial-console.txt
sgi-ioc4.txt
SM501.txt
smsc_ece1099.txt
sparse.txt
stable_api_nonsense.txt
stable_kernel_rules.txt	stable_kernel_rules.txt: Remove extra space after Cc:	2015-11-20 16:54:57 -07:00
static-keys.txt
SubmitChecklist
SubmittingDrivers
SubmittingPatches	A few more documentation patches that wandered in and have no reason to	2015-11-13 09:19:05 -08:00
svga.txt
sysfs-rules.txt
sysrq.txt
this_cpu_ops.txt
ubsan.txt	UBSAN: run-time undefined behavior sanity checker	2016-01-20 17:09:18 -08:00
unaligned-memory-access.txt
unicode.txt
unshare.txt
vfio.txt
VGA-softcursor.txt
vgaarbiter.txt
video-output.txt
vme_api.txt
volatile-considered-harmful.txt
workqueue.txt
xillybus.txt
xz.txt
zorro.txt