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Joonsoo Kim d3cda2337b mm/page_alloc: don't reserve ZONE_HIGHMEM for ZONE_MOVABLE request 
Freepage on ZONE_HIGHMEM doesn't work for kernel memory so it's not that
important to reserve.  When ZONE_MOVABLE is used, this problem would
theorectically cause to decrease usable memory for GFP_HIGHUSER_MOVABLE
allocation request which is mainly used for page cache and anon page
allocation.  So, fix it by setting 0 to
sysctl_lowmem_reserve_ratio[ZONE_HIGHMEM].

And, defining sysctl_lowmem_reserve_ratio array by MAX_NR_ZONES - 1 size
makes code complex.  For example, if there is highmem system, following
reserve ratio is activated for *NORMAL ZONE* which would be easyily
misleading people.

 #ifdef CONFIG_HIGHMEM
 32
 #endif

This patch also fixes this situation by defining
sysctl_lowmem_reserve_ratio array by MAX_NR_ZONES and place "#ifdef" to
right place.

Link: http://lkml.kernel.org/r/1504672525-17915-1-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Tested-by: Tony Lindgren <tony@atomide.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Laura Abbott <lauraa@codeaurora.org>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Cc: <linux-api@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-04-11 10:28:32 -07:00
..
ABI
Merge tag 'rtc-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
2018-04-10 10:22:27 -07:00
accelerators
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accounting
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acpi
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admin-guide
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2018-04-09 11:42:31 -07:00
aoe
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arm
Merge tag 'mtd/for-4.17' of git://git.infradead.org/linux-mtd
2018-04-06 12:15:41 -07:00
arm64
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2018-04-09 11:42:31 -07:00
auxdisplay
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backlight
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block
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blockdev
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bpf
bpf, doc: add description wrt native/bpf clang target and pointer size
2018-03-20 15:47:45 -07:00
bus-devices
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cdrom
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cgroup-v1
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cma
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connector
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console
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core-api
Documentation: Mention why %p prints ptrval
2018-03-23 12:42:18 -06:00
cpu-freq
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cpuidle
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crypto
crypto: doc - clarify hash callbacks state machine
2018-03-31 01:33:02 +08:00
dev-tools
Merge tag 'docs-4.17' of git://git.lwn.net/linux
2018-04-03 13:35:51 -07:00
device-mapper
dm verity: add 'check_at_most_once' option to only validate hashes once
2018-04-03 15:04:29 -04:00
devicetree
Merge tag 'mips_4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips
2018-04-10 11:39:22 -07:00
doc-guide
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driver-api
Merge tag 'mtd/for-4.17' of git://git.infradead.org/linux-mtd
2018-04-06 12:15:41 -07:00
driver-model
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early-userspace
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EDID
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extcon
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fault-injection
Documentation: nvme: Documentation for nvme fault injection
2018-03-26 08:53:43 -06:00
fb
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features
Merge tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
2018-04-02 20:20:12 -07:00
filesystems
Merge tag 'for-linus-4.17-ofs' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux
2018-04-09 12:45:47 -07:00
firmware_class
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fmc
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fpga
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gpio
Documentation: gpio: Move drivers-on-gpio.txt to driver-api
2018-03-23 04:22:29 +01:00
gpu
Backmerge tag 'v4.16-rc7' into drm-next
2018-03-28 14:30:41 +10:00
hid
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hwmon
hwmon: (lm92) Add max6635 to lm92_id[]
2018-03-22 09:33:24 -07:00
i2c
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ia64
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ide
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iio
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infiniband
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input
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2018-04-05 13:21:57 -07:00
ioctl
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isdn
Documentation/isdn: check and fix dead links ...
2018-03-26 12:31:13 -04:00
kbuild
Merge tag 'kconfig-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2018-04-03 16:28:01 -07:00
kdump
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kernel-hacking
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laptops
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leds
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lightnvm
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livepatch
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locking
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m68k
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maintainer
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md
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media
media: extended-controls.rst: transmitter -> receiver
2018-04-04 08:05:20 -04:00
memory-devices
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mic
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mips
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misc-devices
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mmc
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mtd
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namespaces
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netlabel
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networking
Merge tag 'staging-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
2018-04-04 18:56:27 -07:00
nfc
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nios2
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nvdimm
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nvmem
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openrisc
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parisc
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PCI
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pcmcia
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perf
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phy
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platform
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power
PM / hibernate: Make passing hibernate offsets more friendly
2018-03-30 12:01:20 +02:00
powerpc
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pps
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process
Merge tag 'kbuild-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2018-04-03 15:51:22 -07:00
pti
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ptp
ptp: Fix documentation to match code.
2018-03-26 12:13:21 -04:00
rapidio
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RCU
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s390
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scheduler
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scsi
scsi: documentation: Obsolete documentation references
2018-03-21 18:34:20 -04:00
security
selinux: Update SELinux SCTP documentation
2018-03-20 16:26:15 -04:00
serial
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sh
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sound
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sparc
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sphinx
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sphinx-static
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spi
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sysctl
mm/page_alloc: don't reserve ZONE_HIGHMEM for ZONE_MOVABLE request
2018-04-11 10:28:32 -07:00
target
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thermal
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timers
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trace
Merge tag 'trace-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2018-04-10 11:27:30 -07:00
translations
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usb
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userspace-api
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virtual
KVM: trivial documentation cleanups
2018-03-28 22:47:06 +02:00
vm
Documentation/vm/hmm.txt: typos and syntaxes fixes
2018-04-11 10:28:31 -07:00
w1
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watchdog
watchdog: remove bfin_wdt driver
2018-03-26 15:57:04 +02:00
wimax
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x86
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2018-04-05 11:56:35 -07:00
xtensa
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.gitignore
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00-INDEX
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atomic_bitops.txt
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atomic_t.txt
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bcache.txt
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bt8xxgpio.txt
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btmrvl.txt
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bus-virt-phys-mapping.txt
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cachetlb.txt
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cgroup-v2.txt
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Changes
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circular-buffers.txt
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clearing-warn-once.txt
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clk.txt
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CodingStyle
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conf.py
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cpu-load.txt
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cputopology.txt
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crc32.txt
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dcdbas.txt
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debugging-modules.txt
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debugging-via-ohci1394.txt
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dell_rbu.txt
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digsig.txt
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DMA-API-HOWTO.txt
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DMA-API.txt
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DMA-attributes.txt
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DMA-ISA-LPC.txt
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docutils.conf
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dontdiff
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efi-stub.txt
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eisa.txt
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flexible-arrays.txt
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futex-requeue-pi.txt
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gcc-plugins.txt
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highuid.txt
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hw_random.txt
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hwspinlock.txt
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index.rst
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intel_txt.txt
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Intel-IOMMU.txt
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io_ordering.txt
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io-mapping.txt
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iostats.txt
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IPMI.txt
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IRQ-affinity.txt
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IRQ-domain.txt
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IRQ.txt
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irqflags-tracing.txt
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isa.txt
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isapnp.txt
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kernel-per-CPU-kthreads.txt
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kobject.txt
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kprobes.txt
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kref.txt
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ldm.txt
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lockup-watchdogs.txt
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logo.gif
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logo.txt
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lsm.txt
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lzo.txt
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mailbox.txt
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Makefile
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memory-barriers.txt
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memory-hotplug.txt
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men-chameleon-bus.txt
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nommu-mmap.txt
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ntb.txt
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numastat.txt
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padata.txt
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parport-lowlevel.txt
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percpu-rw-semaphore.txt
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phy.txt
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pi-futex.txt
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pnp.txt
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preempt-locking.txt
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pwm.txt
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rbtree.txt
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remoteproc.txt
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rfkill.txt
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robust-futex-ABI.txt
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robust-futexes.txt
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rpmsg.txt
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rtc.txt
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SAK.txt
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sgi-ioc4.txt
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siphash.txt
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SM501.txt
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smsc_ece1099.txt
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speculation.txt
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static-keys.txt
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SubmittingPatches
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svga.txt
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switchtec.txt
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sync_file.txt
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tee.txt
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this_cpu_ops.txt
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unaligned-memory-access.txt
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vfio-mediated-device.txt
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vfio.txt
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video-output.txt
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xillybus.txt
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xz.txt
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zorro.txt
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