David Rientjes a5c6d65093 mm, page_alloc: extend kernelcore and movablecore for percent ... Both kernelcore= and movablecore= can be used to define the amount of ZONE_NORMAL and ZONE_MOVABLE on a system, respectively. This requires the system memory capacity to be known when specifying the command line, however. This introduces the ability to define both kernelcore= and movablecore= as a percentage of total system memory. This is convenient for systems software that wants to define the amount of ZONE_MOVABLE, for example, as a proportion of a system's memory rather than a hardcoded byte value. To define the percentage, the final character of the parameter should be a '%'. mhocko: "why is anyone using these options nowadays?" rientjes: : : Fragmentation of non-__GFP_MOVABLE pages due to low on memory : situations can pollute most pageblocks on the system, as much as 1GB of : slab being fragmented over 128GB of memory, for example. When the : amount of kernel memory is well bounded for certain systems, it is : better to aggressively reclaim from existing MIGRATE_UNMOVABLE : pageblocks rather than eagerly fallback to others. : : We have additional patches that help with this fragmentation if you're : interested, specifically kcompactd compaction of MIGRATE_UNMOVABLE : pageblocks triggered by fallback of non-__GFP_MOVABLE allocations and : draining of pcp lists back to the zone free area to prevent stranding. [rientjes@google.com: updates] Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1802131700160.71590@chino.kir.corp.google.com Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1802121622470.179479@chino.kir.corp.google.com Signed-off-by: David Rientjes <rientjes@google.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Mel Gorman <mgorman@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2018-04-05 21:36:25 -07:00
..
ABI	Char/Misc patches for 4.17-rc1	2018-04-04 20:07:20 -07:00
accelerators	ocxl: Document the OCXL_IOCTL_GET_METADATA IOCTL	2018-03-02 13:02:15 +11:00
accounting
acpi	ACPI / LPIT: Add Low Power Idle Table (LPIT) support	2017-10-11 15:38:10 +02:00
admin-guide	mm, page_alloc: extend kernelcore and movablecore for percent	2018-04-05 21:36:25 -07:00
aoe
arm	ARM: sunxi: add support for R40 SoC	2017-09-22 21:57:09 +02:00
arm64	arm64: Add work around for Arm Cortex-A55 Erratum 1024718	2018-03-26 18:01:44 +01:00
auxdisplay
backlight
block	block, bfq: move debug blkio stats behind CONFIG_DEBUG_BLK_CGROUP	2017-11-14 20:13:33 -07:00
blockdev	SCSI misc on 20170907	2017-09-07 21:11:05 -07:00
bpf	bpf, doc: add description wrt native/bpf clang target and pointer size	2018-03-20 15:47:45 -07:00
bus-devices
cdrom	documentation: Update ide-cd documentation to reflect CONFIG_BLK_DEV_HD_IDE removal	2017-10-12 11:25:31 -06:00
cgroup-v1	Documentation: Fix 'file_mapped' -> 'mapped_file'	2018-01-30 09:52:11 -08:00
cma
connector
console
core-api	Documentation: Mention why %p prints ptrval	2018-03-23 12:42:18 -06:00
cpu-freq	cpufreq: Add and use cpufreq_for_each_{valid_,}entry_idx()	2018-02-08 10:21:39 +01:00
cpuidle
crypto	crypto: doc - clarify hash callbacks state machine	2018-03-31 01:33:02 +08:00
dev-tools	There's been a fair amount of activity in Documentation/ this time around:	2018-04-03 13:35:51 -07:00
device-mapper	dm cache: Documentation: update default migration_throttling value	2018-01-30 16:55:47 -05:00
devicetree	Char/Misc patches for 4.17-rc1	2018-04-04 20:07:20 -07:00
doc-guide	doc-guide: kernel-doc: add comment about formatting verification	2018-02-23 08:06:15 -07:00
driver-api	Char/Misc patches for 4.17-rc1	2018-04-04 20:07:20 -07:00
driver-model	serdev: Introduce devm_serdev_device_open()	2018-01-08 10:08:34 +00:00
early-userspace
EDID
extcon
fault-injection	Documentation updates for 4.16. New stuff includes refcount_t	2018-01-31 19:25:25 -08:00
fb	documentation: fb: update list of available compiled-in fonts	2017-11-08 03:39:52 -07:00
features	arch: remove obsolete architecture ports	2018-04-02 20:20:12 -07:00
filesystems	various SMB3/CIFS fixes for 4.17	2018-04-04 14:09:27 -07:00
firmware_class
fmc
fpga	fpga: mgr: separate getting/locking FPGA manager	2017-11-28 16:30:37 +01:00
gpio	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2018-02-01 10:49:58 -08:00
gpu	Linux 4.16-rc7	2018-03-28 14:30:41 +10:00
hid	Documentation: fix input related doc refs	2017-10-12 11:14:06 -06:00
hwmon	hwmon: (pmbus/max31785) Add dual tachometer support	2018-01-02 15:05:34 -08:00
i2c	i2c: i801: Add missing documentation entries for Braswell and Kaby Lake	2018-02-21 09:17:20 +01:00
ia64	ia64: doc: tweak whitespace for 'console=' parameter	2018-03-05 14:41:38 -08:00
ide
iio
infiniband	Documentation/ABI: update infiniband sysfs interfaces	2018-02-23 08:18:33 -07:00
input	Input: alps - Update documentation for trackstick v3 format	2018-03-26 08:40:34 -06:00
ioctl	arch: remove tile port	2018-03-16 10:56:03 +01:00
isdn	Documentation/isdn: check and fix dead links ...	2018-03-26 12:31:13 -04:00
kbuild	Kconfig updates for v4.17	2018-04-03 16:28:01 -07:00
kdump
kernel-hacking	Documentation: Fix misconversion of #if	2018-01-17 16:45:01 -07:00
laptops	Documentation: fix admin-guide doc refs	2017-10-12 11:13:28 -06:00
leds	Documentation: leds: Update 00-INDEX file	2017-10-23 20:17:03 +02:00
lightnvm
livepatch	livepatch: Remove immediate feature	2018-01-11 10:58:03 +01:00
locking	Linux 4.16-rc2	2018-02-21 09:57:55 +01:00
m68k
maintainer	docs: Add an intro note to the maintainers handbook	2017-12-11 14:46:10 -07:00
md	raid5-ppl: PPL support for disks with write-back cache enabled	2018-01-15 14:29:42 -08:00
media	media: cec-pin-error-inj.rst: document CEC Pin Error Injection	2018-03-22 08:54:21 -04:00
memory-devices
mic
mips	Documentation: mips: Update AU1xxx_IDE Kconfig dependencies	2018-02-01 12:45:35 -07:00
misc-devices
mmc
mtd	mtd: spi-nor: add an API to restore the status of SPI flash chip	2017-12-13 00:36:00 +01:00
namespaces
netlabel
networking	Staging/IIO patches for 4.17-rc1	2018-04-04 18:56:27 -07:00
nfc
nios2
nvdimm
nvmem
openrisc	Documentation: openrisc: Updates to README	2017-10-30 21:37:53 +09:00
parisc
PCI	PCI: Update location of pci.ids file	2018-02-22 15:00:43 -06:00
pcmcia
perf	perf: ARM DynamIQ Shared Unit PMU support	2018-01-02 16:43:12 +00:00
phy
platform
power	PM / hibernate: Make passing hibernate offsets more friendly	2018-03-30 12:01:20 +02:00
powerpc
pps	drivers/pps: aesthetic tweaks to PPS-related content	2017-09-08 18:26:51 -07:00
process	Kbuild updates for v4.17	2018-04-03 15:51:22 -07:00
pti
ptp	ptp: Fix documentation to match code.	2018-03-26 12:13:21 -04:00
rapidio	Documentation: rapidio: move sysfs interface to ABI	2018-02-23 08:25:45 -07:00
RCU	Merge branches 'cond_resched.2017.12.04a', 'dyntick.2017.11.28a', 'fixes.2017.12.11a', 'srbd.2017.12.05a' and 'torture.2017.12.11a' into HEAD	2017-12-11 09:21:58 -08:00
s390
scheduler	sched/deadline: Fix the description of runtime accounting in the documentation	2017-11-16 09:00:35 +01:00
scsi	scsi: documentation: Fix case of 'scsi_device' struct mention(s)	2017-12-02 08:43:43 -07:00
security	Documentation: security/credentials.rst: explain need to sort group_list	2018-01-08 14:20:31 -07:00
serial
sh
sound	sound updates for 4.15-rc1	2017-11-14 18:01:46 -08:00
sparc	sparc64: Add support for ADI (Application Data Integrity)	2018-03-18 07:38:48 -07:00
sphinx	Documentation/sphinx: Fix Directive import error	2018-03-09 10:46:14 -07:00
sphinx-static
spi
sysctl	net: do not create fallback tunnels for non-default namespaces	2018-03-09 11:23:11 -05:00
target
thermal	cpu_cooling: Remove static-power related documentation	2018-01-03 13:11:48 +01:00
timers	sched/isolation: Eliminate NO_HZ_FULL_ALL	2018-02-15 15:40:37 -08:00
trace	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-04-04 14:50:29 -07:00
translations	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk	2018-02-01 13:36:15 -08:00
usb	Documentation updates for 4.16. New stuff includes refcount_t	2018-01-31 19:25:25 -08:00
userspace-api
virtual	KVM: x86: Add a framework for supporting MSR-based features	2018-03-01 19:00:28 +01:00
vm	docs/vm: update 00-INDEX	2018-03-21 09:10:23 -06:00
w1	Documentation updates for 4.16. New stuff includes refcount_t	2018-01-31 19:25:25 -08:00
watchdog	watchdog: remove bfin_wdt driver	2018-03-26 15:57:04 +02:00
wimax
x86	Merge branch 'x86/urgent' into x86/mm to pick up dependencies	2018-03-14 20:23:25 +01:00
xtensa	xtensa: add support for KASAN	2017-12-16 22:37:12 -08:00
.gitignore
00-INDEX	CRIS: Drop support for the CRIS port	2018-03-16 10:56:05 +01:00
atomic_bitops.txt	locking/atomic/bitops: Document and clarify ordering semantics for failed test_and_{}_bit()	2018-02-13 14:55:53 +01:00
atomic_t.txt
bcache.txt
bt8xxgpio.txt
btmrvl.txt
bus-virt-phys-mapping.txt
cachetlb.txt
cgroup-v2.txt	cgroup, docs: document the root cgroup behavior of cpu and io controllers	2018-01-16 08:07:09 -08:00
Changes
circular-buffers.txt	doc: De-emphasize smp_read_barrier_depends	2017-12-05 11:57:53 -08:00
clearing-warn-once.txt	kernel debug: support resetting WARN*_ONCE	2017-11-17 16:10:00 -08:00
clk.txt
CodingStyle
conf.py	docs: Remove "could not extract kernel version" warning	2017-12-11 15:20:04 -07:00
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
DMA-API.txt
DMA-attributes.txt
DMA-ISA-LPC.txt
docutils.conf
dontdiff
efi-stub.txt
eisa.txt
flexible-arrays.txt
futex-requeue-pi.txt
gcc-plugins.txt
highuid.txt
hw_random.txt
hwspinlock.txt
index.rst	Documentation: add Linux tracing to Sphinx TOC tree	2018-03-07 10:22:53 -07:00
intel_txt.txt
Intel-IOMMU.txt
io_ordering.txt
io-mapping.txt
iostats.txt
IPMI.txt	ipmi: Make IPMI panic strings always available	2017-09-27 16:03:45 -05:00
IRQ-affinity.txt
IRQ-domain.txt	irqdomain: Kill CONFIG_IRQ_DOMAIN_DEBUG	2018-01-24 12:32:58 +01:00
IRQ.txt
irqflags-tracing.txt
isa.txt
isapnp.txt
kernel-per-CPU-kthreads.txt
kobject.txt
kprobes.txt	kprobes/docs: Remove jprobes related documents	2017-10-20 11:02:55 +02:00
kref.txt
ldm.txt
lockup-watchdogs.txt
logo.gif
logo.txt
lsm.txt
lzo.txt
mailbox.txt
Makefile	Documentation: add script and build target to check for broken file references	2017-10-12 11:07:42 -06:00
memory-barriers.txt	locking/memory-barriers: De-emphasize smp_read_barrier_depends() some more	2018-03-10 10:22:22 +01:00
memory-hotplug.txt
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	Documentation: fix locking rt-mutex doc refs	2017-10-19 12:56:44 -06:00
pnp.txt
preempt-locking.txt
pwm.txt
rbtree.txt	rbtree: cache leftmost node internally	2017-09-08 18:26:48 -07:00
remoteproc.txt
rfkill.txt
robust-futex-ABI.txt
robust-futexes.txt
rpmsg.txt
rtc.txt	Documentation: rtc: move iotcl interface documentation to ABI	2018-01-12 00:20:41 +01:00
SAK.txt
sgi-ioc4.txt
siphash.txt
SM501.txt
smsc_ece1099.txt
speculation.txt	Documentation: Document array_index_nospec	2018-01-30 21:54:28 +01:00
static-keys.txt
SubmittingPatches
svga.txt	documentation/svga.txt: update outdated file	2017-11-20 10:45:50 -07:00
switchtec.txt	NTB: switchtec_ntb: Update switchtec documentation with notes for NTB	2017-11-18 20:37:13 -05:00
sync_file.txt
tee.txt
this_cpu_ops.txt
unaligned-memory-access.txt
vfio-mediated-device.txt
vfio.txt
video-output.txt
xillybus.txt
xz.txt
zorro.txt