Mel Gorman 4f9b16a647 mm: disable zone_reclaim_mode by default ... When it was introduced, zone_reclaim_mode made sense as NUMA distances punished and workloads were generally partitioned to fit into a NUMA node. NUMA machines are now common but few of the workloads are NUMA-aware and it's routine to see major performance degradation due to zone_reclaim_mode being enabled but relatively few can identify the problem. Those that require zone_reclaim_mode are likely to be able to detect when it needs to be enabled and tune appropriately so lets have a sensible default for the bulk of users. This patch (of 2): zone_reclaim_mode causes processes to prefer reclaiming memory from local node instead of spilling over to other nodes. This made sense initially when NUMA machines were almost exclusively HPC and the workload was partitioned into nodes. The NUMA penalties were sufficiently high to justify reclaiming the memory. On current machines and workloads it is often the case that zone_reclaim_mode destroys performance but not all users know how to detect this. Favour the common case and disable it by default. Users that are sophisticated enough to know they need zone_reclaim_mode will detect it. Signed-off-by: Mel Gorman <mgorman@suse.de> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Acked-by: Michal Hocko <mhocko@suse.cz> Reviewed-by: Christoph Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-06-04 16:53:59 -07:00
..
ABI	ACPI and power management updates for 3.16-rc1	2014-06-04 08:57:16 -07:00
DocBook	USB driver patches for 3.16-rc1	2014-06-03 09:11:20 -07:00
EDID	…
PCI	…
RCU	documentation: Update API documentation	2014-04-29 08:38:53 -07:00
accounting	…
acpi	Documentation / ACPI: Fix location of GPIO documentation	2014-05-23 14:39:26 +02:00
aoe	…
arm	Despite relatively young Berlin SoC support, we already have support	2014-05-26 13:41:02 -07:00
arm64	- Documentation clarification on CPU topology and booting requirements	2014-04-08 12:06:03 -07:00
auxdisplay	…
backlight	…
blackfin	…
block	…
blockdev	zram: propagate error to user	2014-04-07 16:36:02 -07:00
bus-devices	…
cdrom	…
cgroups	mm: memcontrol: remove hierarchy restrictions for swappiness and oom_control	2014-06-04 16:53:58 -07:00
connector	w1: optional bundling of netlink kernel replies	2014-05-27 13:56:21 -07:00
console	…
cpu-freq	PM / OPP: Move cpufreq specific OPP functions out of generic OPP library	2014-05-07 00:39:03 +02:00
cpuidle	…
cris	…
crypto	…
development-process	…
device-mapper	dm thin: add 'no_space_timeout' dm-thin-pool module param	2014-05-20 14:30:36 -04:00
devicetree	DeviceTree for 3.16:	2014-06-04 10:02:38 -07:00
driver-model	Staging driver patches for 3.16-rc1	2014-06-03 08:34:00 -07:00
dvb	…
early-userspace	…
extcon	…
fault-injection	…
fb	doc: spelling error changes	2014-05-05 15:32:05 +02:00
filesystems	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
firmware_class	…
fmc	…
frv	…
gpio	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
hwmon	New driver for NCT6683D	2014-06-03 11:09:43 -07:00
i2c	Documentation: i2c: improve section about flags mangling the protocol	2014-04-06 13:53:48 +02:00
i2o	…
ia64	…
ide	…
infiniband	…
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
ioctl	…
isdn	…
ja_JP	Documentation: Update stable address in Chinese and Japanese translations	2014-04-16 14:13:27 -07:00
kbuild	kconfig: make allnoconfig disable options behind EMBEDDED and EXPERT	2014-04-07 16:36:09 -07:00
kdump	…
ko_KR	…
laptops	…
leds	…
m68k	…
make	…
memory-devices	…
metag	…
mic	…
mips	…
misc-devices	…
mmc	…
mn10300	…
mtd	doc: spelling error changes	2014-05-05 15:32:05 +02:00
namespaces	…
netlabel	…
networking	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
nfc	…
parisc	…
pcmcia	…
phy	…
power	Merge branch 'pm-cpufreq'	2014-06-03 23:13:20 +02:00
powerpc	doc: spelling error changes	2014-05-05 15:32:05 +02:00
pps	…
prctl	…
pti	…
ptp	ptp: Fix compiler warnings in the testptp utility	2014-03-27 14:51:47 -04:00
rapidio	rapidio: rework device hierarchy and introduce mport class of devices	2014-04-07 16:36:07 -07:00
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
scheduler	asm/system.h: clean asm/system.h from docs	2014-04-07 16:36:11 -07:00
scsi	[SCSI] megaraid_sas: Version and Changelog update	2014-03-15 10:19:21 -07:00
security	doc: spelling error changes	2014-05-05 15:32:05 +02:00
serial	tty/serial: Add GPIOLIB helpers for controlling modem lines	2014-05-28 12:49:14 -07:00
sh	…
sound	doc: spelling error changes	2014-05-05 15:32:05 +02:00
spi	Merge remote-tracking branches 'spi/topic/s3c64xx', 'spi/topic/sc18is602', 'spi/topic/sh-hspi', 'spi/topic/sh-msiof', 'spi/topic/sh-sci', 'spi/topic/sirf' and 'spi/topic/spidev' into spi-next	2014-03-30 00:51:34 +00:00
sysctl	mm: disable zone_reclaim_mode by default	2014-06-04 16:53:59 -07:00
target	…
thermal	…
timers	…
tpm	…
trace	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
usb	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
vDSO	…
video4linux	[media] s5p-fimc: Remove reference to outdated macro	2014-03-14 10:37:43 -03:00
virtual	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
vm	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
w1	w1: optional bundling of netlink kernel replies	2014-05-27 13:56:21 -07:00
watchdog	watchdog: it87_wdt: Work around non-working CIR interrupts	2014-03-31 13:33:55 +02:00
wimax	…
x86	doc: spelling error changes	2014-05-05 15:32:05 +02:00
xtensa	…
zh_CN	driver core fixes for 3.15-rc2	2014-04-18 16:59:52 -07:00
.gitignore	…
00-INDEX	Merge branch 'x86-nuke-platforms-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-04-02 13:15:58 -07:00
BUG-HUNTING	…
Changes	doc: Note need of bc in the kernel build from 3.10 onwards	2014-05-19 16:27:20 +02:00
CodingStyle	…
DMA-API-HOWTO.txt	DMA-API: Update dma_pool_create ()and dma_pool_alloc() descriptions	2014-05-26 17:28:28 -06:00
DMA-API.txt	DMA-API: Capitalize "CPU" consistently	2014-05-26 17:28:27 -06:00
DMA-ISA-LPC.txt	DMA-API: Clarify physical/bus address distinction	2014-05-20 16:54:21 -06:00
DMA-attributes.txt	doc: spelling error changes	2014-05-05 15:32:05 +02:00
HOWTO	…
IPMI.txt	…
IRQ-affinity.txt	…
IRQ-domain.txt	…
IRQ.txt	…
Intel-IOMMU.txt	…
Makefile	…
ManagementStyle	…
SAK.txt	…
SM501.txt	…
SecurityBugs	…
SubmitChecklist	…
SubmittingDrivers	…
SubmittingPatches	Documentation/SubmittingPatches: update some dead URLs	2014-04-03 16:21:27 -07:00
VGA-softcursor.txt	…
applying-patches.txt	…
assoc_array.txt	…
atomic_ops.txt	arch,doc: Convert smp_mb__*()	2014-04-18 14:20:48 +02:00
bad_memory.txt	…
basic_profiling.txt	…
bcache.txt	…
binfmt_misc.txt	…
braille-console.txt	…
bt8xxgpio.txt	…
btmrvl.txt	…
bus-virt-phys-mapping.txt	…
cachetlb.txt	…
circular-buffers.txt	…
clk.txt	Documentation: clk: Add locking documentation	2014-03-19 14:56:06 -07:00
coccinelle.txt	…
cpu-hotplug.txt	Doc/cpu-hotplug: Specify race-free way to register CPU hotplug callbacks	2014-03-20 13:43:40 +01:00
cpu-load.txt	…
cputopology.txt	…
crc32.txt	…
dcdbas.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	firewire: revert to 4 GB RDMA, fix protocols using Memory Space	2014-05-29 15:50:30 +02:00
dell_rbu.txt	…
devices.txt	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2014-04-04 09:50:07 -07:00
digsig.txt	…
dma-buf-sharing.txt	doc: spelling error changes	2014-05-05 15:32:05 +02:00
dmaengine.txt	…
dmatest.txt	…
dontdiff	Documentation: LLVMLinux: Update Documentation/dontdiff	2014-04-09 13:44:34 -07:00
dynamic-debug-howto.txt	doc: spelling error changes	2014-05-05 15:32:05 +02:00
edac.txt	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
efi-stub.txt	…
eisa.txt	…
email-clients.txt	Documentation: update thunderbird email client settings	2014-05-25 12:39:00 -07:00
flexible-arrays.txt	…
futex-requeue-pi.txt	doc: fix double words	2014-03-21 13:16:58 +01:00
gcov.txt	…
highuid.txt	…
hsi.txt	Documentation: HSI: Add some general description for the HSI subsystem	2014-05-04 09:49:46 +02:00
hw_random.txt	…
hwspinlock.txt	…
init.txt	…
initrd.txt	…
intel_txt.txt	…
io-mapping.txt	…
io_ordering.txt	…
iostats.txt	…
irqflags-tracing.txt	asm/system.h: clean asm/system.h from docs	2014-04-07 16:36:11 -07:00
isapnp.txt	…
java.txt	Documentation: update java sample wrapper for java 7	2014-05-25 12:39:00 -07:00
kernel-doc-nano-HOWTO.txt	…
kernel-docs.txt	…
kernel-parameters.txt	cma: add placement specifier for "cma=" kernel parameter	2014-06-04 16:53:57 -07:00
kernel-per-CPU-kthreads.txt	…
kmemcheck.txt	doc: fix double words	2014-03-21 13:16:58 +01:00
kmemleak.txt	Documentation/kmemleak.txt: updates	2014-04-03 16:21:27 -07:00
kobject.txt	…
kprobes.txt	…
kref.txt	…
ldm.txt	…
local_ops.txt	…
lockdep-design.txt	…
lockstat.txt	…
lockup-watchdogs.txt	…
logo.gif	…
logo.txt	…
magic-number.txt	Documentation/serial: Delete obsolete driver documentation	2014-04-16 14:20:34 -07:00
md.txt	…
media-framework.txt	…
memory-barriers.txt	arch,doc: Convert smp_mb__*()	2014-04-18 14:20:48 +02:00
memory-hotplug.txt	memory-hotplug: update documentation to hide information about SECTIONS and remove end_phys_index	2014-06-04 16:53:58 -07:00
module-signing.txt	Nothing major: the stricter permissions checking for sysfs broke	2014-04-06 09:38:07 -07:00
mono.txt	…
mutex-design.txt	…
nommu-mmap.txt	…
numastat.txt	…
oops-tracing.txt	Use 'E' instead of 'X' for unsigned module taint flag.	2014-03-31 14:52:43 +10:30
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	doc: printk-formats: do not mention casts for u64/s64	2014-05-05 15:32:42 +02:00
pwm.txt	…
ramoops.txt	…
rbtree.txt	doc: spelling error changes	2014-05-05 15:32:05 +02:00
remoteproc.txt	…
rfkill.txt	doc: spelling error changes	2014-05-05 15:32:05 +02:00
robust-futex-ABI.txt	…
robust-futexes.txt	doc: spelling error changes	2014-05-05 15:32:05 +02:00
rpmsg.txt	…
rt-mutex-design.txt	…
rt-mutex.txt	…
rtc.txt	…
serial-console.txt	…
sgi-ioc4.txt	…
smsc_ece1099.txt	…
sparse.txt	…
spinlocks.txt	…
stable_api_nonsense.txt	…
stable_kernel_rules.txt	stable_kernel_rules: spelling/word usage	2014-04-16 14:13:26 -07:00
static-keys.txt	…
svga.txt	…
sysfs-rules.txt	…
sysrq.txt	…
this_cpu_ops.txt	…
unaligned-memory-access.txt	…
unicode.txt	…
unshare.txt	…
vfio.txt	…
vgaarbiter.txt	…
video-output.txt	…
vme_api.txt	…
volatile-considered-harmful.txt	…
workqueue.txt	…
ww-mutex-design.txt	…
xz.txt	…
zorro.txt	…