Vladimir Davydov f074a8f49e proc: export idle flag via kpageflags ... As noted by Minchan, a benefit of reading idle flag from /proc/kpageflags is that one can easily filter dirty and/or unevictable pages while estimating the size of unused memory. Note that idle flag read from /proc/kpageflags may be stale in case the page was accessed via a PTE, because it would be too costly to iterate over all page mappings on each /proc/kpageflags read to provide an up-to-date value. To make sure the flag is up-to-date one has to read /sys/kernel/mm/page_idle/bitmap first. Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Reviewed-by: Andres Lagar-Cavilla <andreslc@google.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Greg Thelen <gthelen@google.com> Cc: Michel Lespinasse <walken@google.com> Cc: David Rientjes <rientjes@google.com> Cc: Pavel Emelyanov <xemul@parallels.com> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2015-09-10 13:29:01 -07:00
..
ABI	xen: features and fixes for 4.3-rc0	2015-09-08 11:46:48 -07:00
DocBook	media updates for v4.3-rc1	2015-09-05 18:21:14 -07:00
EDID	drm: Add 800x600 (SVGA) screen resolution to the built-in EDIDs	2014-05-26 12:53:40 +10:00
PCI	The documentation tree update for 4.1. Numerous fixes, the overdue removal	2015-04-18 11:10:49 -04:00
RCU	Merge branches 'doc.2015.07.15a' and 'torture.2015.07.15a' into HEAD	2015-08-04 08:42:02 -07:00
accounting	Documentation: use subdir-y to avoid unnecessary built-in.o files	2014-09-26 11:02:55 +02:00
acpi	ACPI / Documentation: Update method tracing documentation.	2015-08-07 02:42:22 +02:00
aoe	…
arm	ARM: SoC platform updates for v4.3	2015-09-01 12:18:40 -07:00
arm64	arm64/Documentation: clarify wording regarding memory below the Image	2015-07-29 18:32:10 +01:00
auxdisplay	Documentation: use subdir-y to avoid unnecessary built-in.o files	2014-09-26 11:02:55 +02:00
backlight	…
blackfin	Docs: blackfin: Use new switch macro SAMPLE_IRQ_TIMER instead of IRQ_TIMER5	2015-05-07 09:35:14 -06:00
block	Documentation: update notes in biovecs about arbitrarily sized bios	2015-08-13 12:32:07 -06:00
blockdev	zsmalloc: account the number of compacted pages	2015-09-08 15:35:28 -07:00
bus-devices	…
cdrom	…
cgroups	Merge branch 'for-4.3-unified-base' into for-4.3	2015-08-25 14:19:29 -04:00
cma	cma: debug: document new debugfs interface	2015-04-14 16:49:00 -07:00
connector	w1: optional bundling of netlink kernel replies	2014-05-27 13:56:21 -07:00
console	…
cpu-freq	cpufreq: remove redundant CPUFREQ_INCOMPATIBLE notifier event	2015-09-01 15:50:38 +02:00
cpuidle	…
cris	…
crypto	crypto: doc - AEAD / RNG AF_ALG interface	2015-03-09 21:06:18 +11:00
development-process	Documentation: remove outdated references to the linux-next wiki	2014-10-28 09:06:11 -04:00
device-mapper	dm raid: document RAID 4/5/6 discard support	2015-08-31 15:05:31 -04:00
devicetree	IPMI updates for 4.3	2015-09-08 18:19:17 -07:00
dmaengine	Documentation: dmaengine: Add DMA_CTRL_REUSE documentation	2015-08-17 13:46:22 +05:30
driver-model	Char/Misc driver patches for 4.1-rc1	2015-04-21 09:42:58 -07:00
dvb	[media] get_dvb_firmware: Update firmware of ITEtech IT9135	2014-09-21 17:03:04 -03:00
early-userspace	…
extcon	…
fault-injection	futex: Fault/error injection capabilities	2015-07-20 11:45:45 +02:00
fb	Documentation/fb: add documentation for sm712fb	2015-08-07 15:05:01 -07:00
features	Documentation/features/vm: add feature description and arch support status for batched TLB flush after unmap	2015-09-04 16:54:41 -07:00
filesystems	Merge branch 'akpm' (patches from Andrew)	2015-09-08 17:52:23 -07:00
firmware_class	doc: fix minor typos in firmware_class README	2014-07-17 18:43:40 -07:00
fmc	…
frv	…
gpio	Documentation: gpio: consumer: describe active low property	2015-08-17 10:38:52 +02:00
hid	HID: sensor: Update document for custom sensor	2015-04-10 22:22:56 +02:00
hwmon	hwmon: (fam15h_power) Add documentation for new processors support	2015-08-27 07:51:15 -07:00
i2c	i2c: support 10 bit and slave addresses in sysfs 'new_device'	2015-08-24 14:05:15 +02:00
ia64	virtual: Documentation: simplify and generalize paravirt_ops.txt	2015-02-13 17:15:44 +10:30
ide	…
infiniband	IB/hfi1: add driver files	2015-08-28 22:59:36 -04:00
input	Merge branch 'next' into for-linus	2015-09-03 10:01:44 -07:00
ioctl	platform-drivers-x86 for 4.3-1	2015-09-08 16:26:18 -07:00
isdn	…
ja_JP	Doc: ja_JP: Fix typo in HOWTO	2015-06-08 16:43:09 -06:00
kbuild	modsign: Allow password to be specified for signing key	2015-08-07 16:26:14 +01:00
kdump	kernel: add panic_on_warn	2014-12-10 17:41:10 -08:00
ko_KR	…
laptops	Move freefall program from Documentation/ to tools/	2015-06-08 16:42:07 -06:00
leds	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds	2015-07-01 19:09:11 -07:00
locking	Documentation changes for 3.20	2015-02-11 13:03:11 -08:00
m68k	…
memory-devices	…
metag	…
mic	Char/Misc driver patches for 4.2-rc1	2015-06-26 14:51:15 -07:00
mips	Documentation: au1xxx-ide.c has moved	2014-08-26 09:35:53 +02:00
misc-devices	mei: add async event notification ioctls	2015-08-03 17:30:00 -07:00
mmc	…
mn10300	…
mtd	MTD updates for 3.16:	2014-06-11 08:35:34 -07:00
namespaces	…
netlabel	…
networking	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2015-09-03 08:08:17 -07:00
nfc	NFC: Fix typo in nfc-hci.txt	2015-06-08 23:15:45 +02:00
nios2	Documentation: Add documentation for Nios2 architecture	2014-12-08 12:56:06 +08:00
nvdimm	libnvdimm: Non-Volatile Devices	2015-06-26 11:23:38 -04:00
nvmem	Documentation: nvmem: add nvmem api level and how-to doc	2015-08-05 13:43:45 -07:00
parisc	…
pcmcia	pcmcia: Fix typo in locking documentation	2015-08-07 14:34:58 +02:00
phy	…
platform	Documentation: Add list of laptop models supported by the Compal driver	2014-06-10 19:11:06 -04:00
power	Power management and ACPI material for v4.3-rc1	2015-09-01 19:45:46 -07:00
powerpc	SCSI misc on 20150901	2015-09-02 12:22:54 -07:00
pps	Doc: pps: Fix file name in pps.txt	2015-07-14 12:35:42 -06:00
prctl	Documentation/prctl: don't build tsc tests when cross compiling	2015-06-22 16:05:04 -06:00
pti	…
ptp	ptp: restore the makefile for building the test program.	2014-10-24 16:07:10 -04:00
rapidio	rapidio/tsi721_dma: rework scatter-gather list handling	2014-08-08 15:57:24 -07:00
s390	KVM: s390: remove outdated documentation	2015-07-29 11:02:35 +02:00
scheduler	sched/dl/Documentation: Split Section 3	2015-05-19 08:39:21 +02:00
scsi	Merge branch 'for-4.2/sg' of git://git.kernel.dk/linux-block	2015-06-25 15:22:36 -07:00
security	Merge branch 'smack-for-4.3' of https://github.com/cschaufler/smack-next into next	2015-08-11 11:18:53 +10:00
serial	Doc: serial-rs485.txt: update RS485 driver interface	2015-06-12 17:39:51 -07:00
sh	…
sound	Doc: sound:oss: Fix typo in sound/oss	2015-06-09 17:23:00 +02:00
spi	Documentation/spi/spidev_test.c: fix warning	2015-04-17 09:04:12 -04:00
sysctl	mm/page_alloc.c: fix a misleading comment	2015-09-08 15:35:28 -07:00
target	Documentation/target: Fix tcm_mod_builder.py build breakage	2015-07-24 17:48:55 -07:00
thermal	thermal: support slope and offset coefficients	2015-05-11 19:46:52 -07:00
timers	documentation: Update NO_HZ_FULL interaction with POSIX timers	2015-02-26 11:57:29 -08:00
tpm	…
trace	Mostly this is just clean ups and micro optimizations.	2015-09-08 14:04:14 -07:00
usb	Revert "usb: interface authorization: Documentation part"	2015-08-18 09:57:15 -07:00
vDSO	Documentation/vDSO: don't build tests when cross compiling	2015-06-22 16:04:57 -06:00
video4linux	[media] Documentation: update cardlists	2015-06-09 18:43:47 -03:00
virtual	kvm/x86: add sending hyper-v crash notification to user space	2015-07-23 08:27:06 +02:00
vm	proc: export idle flag via kpageflags	2015-09-10 13:29:01 -07:00
w1	w1: Add support for DS28EA00 sequence to w1-therm	2015-05-24 12:08:59 -07:00
watchdog	watchdog: omap_wdt: early_enable module parameter	2015-07-01 16:43:17 +02:00
wimax	…
x86	Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-09-01 10:07:40 -07:00
xtensa	…
zh_CN	Documentation updates for 4.2	2015-06-24 20:01:36 -07:00
00-INDEX	Update of Documentation/dmaengine/00-INDEX	2014-12-29 15:28:24 -07:00
BUG-HUNTING	…
Changes	Documentation/Changes: Now need OpenSSL devel packages for module signing	2015-08-28 08:00:30 +10:00
CodeOfConflict	Code of Conflict	2015-02-27 11:44:24 -08:00
CodingStyle	Documentation: CodingStyle: remove broken links in the References section	2015-07-10 13:54:34 -06:00
DMA-API-HOWTO.txt	Documentation updates for 4.2	2015-06-24 20:01:36 -07:00
DMA-API.txt	mm: add dma_pool_zalloc() call to DMA API	2015-09-08 15:35:28 -07:00
DMA-ISA-LPC.txt	…
DMA-attributes.txt	…
HOWTO	docs: update HOWTO for 3.x -> 4.x versioning	2015-08-24 11:28:17 -06:00
IPMI.txt	ipmi:ssif: Ignore spaces when comparing I2C adapter names	2015-05-05 14:24:45 -05:00
IRQ-affinity.txt	…
IRQ-domain.txt	IRQCHIP: Update docs regarding irq_domain_add_tree()	2015-04-01 17:21:35 +02:00
IRQ.txt	…
Intel-IOMMU.txt	x86/vt-d: Fix documentation of DRHD	2015-08-25 10:44:49 +02:00
Makefile	Documentation: Remove ZBOOT MMC/SDHI utility and docs	2015-02-24 06:45:25 +09:00
ManagementStyle	…
SAK.txt	…
SM501.txt	…
SecurityBugs	…
SubmitChecklist	…
SubmittingDrivers	doc: SubmittingPatches: remove dead link, kerneltrap.org no longer works	2014-06-19 15:15:27 +02:00
SubmittingPatches	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2015-09-01 18:46:42 -07:00
VGA-softcursor.txt	…
adding-syscalls.txt	Documentation: describe how to add a system call	2015-08-13 17:54:06 -06:00
applying-patches.txt	Documentation: change "&" to "and" in Documentation/applying-patches.txt	2014-09-26 11:10:11 +02:00
assoc_array.txt	…
atomic_ops.txt	locking/Documentation: Clarify failed cmpxchg() memory ordering semantics	2015-08-03 10:57:09 +02:00
bad_memory.txt	…
basic_profiling.txt	…
bcache.txt	…
binfmt_misc.txt	binfmt_misc: touch up documentation a bit	2014-10-14 02:18:16 +02:00
braille-console.txt	…
bt8xxgpio.txt	…
btmrvl.txt	…
bus-virt-phys-mapping.txt	…
cachetlb.txt	rmap: drop support of non-linear mappings	2015-02-10 14:30:31 -08:00
circular-buffers.txt	…
clk.txt	clk: change clk_ops' ->determine_rate() prototype	2015-07-27 18:12:01 -07:00
coccinelle.txt	…
cpu-hotplug.txt	cpumask: fix cpu-hotplug documentation	2015-03-05 13:37:01 +10:30
cpu-load.txt	…
cputopology.txt	Documentation: Update cputopology.txt	2015-05-27 15:22:15 +02:00
crc32.txt	…
dcdbas.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	Doc: Change wikipedia's URL from http to https	2015-06-22 10:14:05 -06:00
dell_rbu.txt	…
devices.txt	…
digsig.txt	…
dma-buf-sharing.txt	dma-buf: cleanup dma_buf_export() to make it easily extensible	2015-04-21 14:47:16 +05:30
dontdiff	…
dynamic-debug-howto.txt	…
edac.txt	EDAC: Update Documentation/edac.txt	2015-06-24 18:17:40 +02:00
efi-stub.txt	…
eisa.txt	…
email-clients.txt	fix Evolution submenu name in email-clients.txt	2015-07-24 15:05:57 +02:00
flexible-arrays.txt	…
futex-requeue-pi.txt	doc: Fix misnamed FUTEX_CMP_REQUEUE_PI op constants	2015-01-19 12:05:32 +01:00
gcov.txt	…
gdb-kernel-debugging.txt	scripts/gdb: add basic documentation	2015-02-17 14:34:54 -08:00
highuid.txt	…
hsi.txt	…
hw_random.txt	…
hwspinlock.txt	hwspinlock/core: add device tree support	2015-05-02 09:54:30 +03:00
init.txt	…
initrd.txt	…
intel_txt.txt	…
io-mapping.txt	…
io_ordering.txt	…
iostats.txt	…
irqflags-tracing.txt	…
isapnp.txt	…
java.txt	Documentation: update java sample wrapper for java 7	2014-05-25 12:39:00 -07:00
kasan.txt	Merge branch 'doc/4.2' into docs-next	2015-06-08 17:04:11 -06:00
kernel-doc-nano-HOWTO.txt	Documenation: Update location of docproc.c	2015-07-14 12:36:39 -06:00
kernel-docs.txt	…
kernel-parameters.txt	xen: features and fixes for 4.3-rc0	2015-09-08 11:46:48 -07:00
kernel-per-CPU-kthreads.txt	documentation: Update per-CPU kthreads documentation	2015-02-26 11:57:30 -08:00
kmemcheck.txt	Documentation: update the CONFIG_DEBUG_PAGEALLOC description	2015-03-20 07:41:55 -06:00
kmemleak.txt	Doc: Change wikipedia's URL from http to https	2015-06-22 10:14:05 -06:00
kobject.txt	kobject: grammar fix	2014-12-08 09:07:11 -05:00
kprobes.txt	kprobes: Update Documentation/kprobes.txt	2015-03-20 07:41:55 -06:00
kref.txt	…
kselftest.txt	kselftest: Move the docs to the Documentation dir	2014-11-24 10:49:54 -07:00
ldm.txt	…
local_ops.txt	percpu: update local_ops.txt to reflect this_cpu operations	2014-12-13 12:42:53 -08:00
lockup-watchdogs.txt	watchdog: add watchdog_cpumask sysctl to assist nohz	2015-06-24 17:49:40 -07:00
logo.gif	…
logo.txt	…
lzo.txt	Documentation: lzo: document part of the encoding	2014-09-28 11:08:00 +02:00
magic-number.txt	Documentation/magic-number: Remove SCC_MAGIC	2015-05-13 15:39:04 -04:00
mailbox.txt	Documentation: minor typo fix in mailbox.txt	2015-08-13 18:03:18 -06:00
md-cluster.txt	md-cluster: fix deadlock issue on message lock	2015-08-31 19:41:41 +02:00
md.txt	doc:md: fix typo in md.txt.	2015-06-23 06:49:44 -06:00
media-framework.txt	…
memory-barriers.txt	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-09-03 15:46:07 -07:00
memory-hotplug.txt	mem-hotplug: fix typo in Documentation/memory-hotplug.txt	2015-03-20 07:41:55 -06:00
men-chameleon-bus.txt	Documentation: Minor changes to men-chameleon-bus.txt	2015-07-24 15:15:17 +02:00
module-signing.txt	Move certificate handling to its own directory	2015-08-14 16:06:13 +01:00
mono.txt	…
nommu-mmap.txt	fs: introduce f_op->mmap_capabilities for nommu mmap support	2015-01-20 14:02:58 -07:00
ntb.txt	NTB: Rename Intel code names to platform names	2015-07-04 14:09:25 -04:00
numastat.txt	…
oops-tracing.txt	livepatch: kernel: add TAINT_LIVEPATCH	2014-12-22 15:40:48 +01:00
padata.txt	…
parport-lowlevel.txt	…
parport.txt	…
percpu-rw-semaphore.txt	…
phy.txt	phy: core: Add devm_of_phy_get_by_index to phy-core	2015-05-11 21:42:23 +05:30
pi-futex.txt	…
pinctrl.txt	pinctrl: move strict option to pinmux_ops	2015-05-06 14:45:19 +02:00
pnp.txt	…
preempt-locking.txt	x86/fpu: Rename math_state_restore() to fpu__restore()	2015-05-19 15:47:18 +02:00
printk-formats.txt	The documentation tree update for 4.1. Numerous fixes, the overdue removal	2015-04-18 11:10:49 -04:00
pwm.txt	…
ramoops.txt	pstore-ram: Allow optional mapping with pgprot_noncached	2014-12-11 13:38:31 -08:00
rbtree.txt	…
remoteproc.txt	remoteproc: introduce rproc_get_by_phandle API	2015-06-16 21:12:52 +03:00
rfkill.txt	rfkill: document rfkill module parameters	2015-01-09 23:22:12 +01:00
robust-futex-ABI.txt	…
robust-futexes.txt	…
rpmsg.txt	…
rtc.txt	Documentation, split up rtc.txt into documentation and test file	2015-03-24 22:01:58 -06:00
serial-console.txt	…
sgi-ioc4.txt	…
smsc_ece1099.txt	…
sparse.txt	…
stable_api_nonsense.txt	…
stable_kernel_rules.txt	stable: Update documentation to clarify preferred procedure	2015-05-22 09:38:56 -06:00
static-keys.txt	jump label, locking/static_keys: Update docs	2015-08-03 11:51:14 +02:00
svga.txt	…
sysfs-rules.txt	Documentation/sysfs-rules.txt: Add device attribute error code documentation	2014-09-19 14:44:51 -07:00
sysrq.txt	mm, oom: do not panic for oom kills triggered from sysrq	2015-09-08 15:35:28 -07:00
this_cpu_ops.txt	Docs: this_cpu_ops: remove redundant add forms	2014-09-26 11:03:00 +02:00
unaligned-memory-access.txt	…
unicode.txt	…
unshare.txt	…
vfio.txt	vfio: powerpc/spapr: Support Dynamic DMA windows	2015-06-11 15:16:55 +10:00
vgaarbiter.txt	…
video-output.txt	…
vme_api.txt	Documentation: mention vme_master_mmap() in VME API	2015-06-12 17:26:56 -07:00
volatile-considered-harmful.txt	…
workqueue.txt	workqueue: fix trivial typo in Documentation/workqueue.txt	2015-05-05 09:50:38 -04:00
xillybus.txt	xillybus: Move out of staging	2014-09-23 23:44:16 -07:00
xz.txt	…
zorro.txt	…