Konstantin Khlebnikov 052fb0d635 proc: report file/anon bit in /proc/pid/pagemap ... This is an implementation of Andrew's proposal to extend the pagemap file bits to report what is missing about tasks' working set. The problem with the working set detection is multilateral. In the criu (checkpoint/restore) project we dump the tasks' memory into image files and to do it properly we need to detect which pages inside mappings are really in use. The mincore syscall I though could help with this did not. First, it doesn't report swapped pages, thus we cannot find out which parts of anonymous mappings to dump. Next, it does report pages from page cache as present even if they are not mapped, and it doesn't make that has not been cow-ed. Note, that issue with swap pages is critical -- we must dump swap pages to image file. But the issues with file pages are optimization -- we can take all file pages to image, this would be correct, but if we know that a page is not mapped or not cow-ed, we can remove them from dump file. The dump would still be self-consistent, though significantly smaller in size (up to 10 times smaller on real apps). Andrew noticed, that the proc pagemap file solved 2 of 3 above issues -- it reports whether a page is present or swapped and it doesn't report not mapped page cache pages. But, it doesn't distinguish cow-ed file pages from not cow-ed. I would like to make the last unused bit in this file to report whether the page mapped into respective pte is PageAnon or not. [comment stolen from Pavel Emelyanov's v1 patch] Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org> Cc: Pavel Emelyanov <xemul@parallels.com> Cc: Matt Mackall <mpm@selenic.com> Cc: Hugh Dickins <hughd@google.com> Cc: Rik van Riel <riel@redhat.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-05-31 17:49:29 -07:00
..
ABI	leds: add LM3533 LED driver	2012-05-29 16:22:32 -07:00
DocBook	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2012-05-24 10:21:51 -07:00
EDID	drm: allow loading an EDID as firmware to override broken monitor	2012-03-20 10:09:28 +00:00
PCI	…
RCU	rcu: Introduce rcutorture testing for rcu_barrier()	2012-04-30 10:48:18 -07:00
accounting	…
acpi	Update documentation for parameter *notrigger* in einj.txt	2012-03-30 03:30:19 -04:00
aoe	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
arm	arm-soc: soc specific changes, part 2	2012-05-26 13:05:55 -07:00
auxdisplay	…
backlight	backlight: new backlight driver for LP855x devices	2012-03-23 16:58:33 -07:00
blackfin	Documentation: Fix typo in multiple files in Documentation	2012-04-16 14:37:13 +02:00
block	…
blockdev	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
cdrom	…
cgroups	memcg: move charges to root cgroup if use_hierarchy=0	2012-05-29 16:22:27 -07:00
connector	…
console	…
cpu-freq	…
cpuidle	cpuidle: add a sysfs entry to disable specific C state for debug purpose.	2012-03-30 01:52:58 -04:00
cris	CRIS: Update documentation	2012-04-03 13:09:18 +02:00
crypto	…
development-process	Documentation: Update stable address	2011-12-12 14:14:31 -08:00
device-mapper	dm: add verity target	2012-03-28 18:43:38 +01:00
devicetree	drivers/rtc/rtc-lpc32xx.c: add device tree support	2012-05-29 16:22:34 -07:00
driver-model	Pin control subsystem changes for kernel 3.5:	2012-05-21 16:58:23 -07:00
dvb	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2012-05-24 10:21:51 -07:00
early-userspace	…
extcon	Documentation/extcon: porting guide for Android kernel switch driver.	2012-04-20 09:24:27 -07:00
fault-injection	…
fb	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
filesystems	mm: document the meminfo and vmstat fields of relevance to transparent hugepages	2012-05-29 16:22:23 -07:00
firmware_class	…
frv	…
hid	…
hwmon	hwmon updates for 3.5-rc1	2012-05-23 14:15:09 -07:00
i2c	i2c: Rename last mux driver to standard pattern	2012-05-12 14:28:18 +02:00
i2o	Documentation: Fix multiple typo in Documentation	2012-03-07 16:08:24 +01:00
ia64	…
ide	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
infiniband	…
input	Documentation: input.txt: clarify mousedev 'cat' command syntax	2012-03-30 16:03:15 -07:00
ioctl	mei: update Documentation/ioctl/ioctl-number.txt	2012-05-09 14:00:31 -07:00
isdn	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
ja_JP	…
kbuild	Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2012-05-28 10:37:56 -07:00
kdump	[S390] Add s390x description to Documentation/kdump/kdump.txt	2011-12-27 11:27:13 +01:00
ko_KR	driver-core: documentation: fix up Greg's email address	2012-02-15 14:48:01 -08:00
laptops	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
leds	leds: add new transient trigger for one shot timer activation	2012-05-29 16:22:32 -07:00
m68k	…
make	…
memory-devices	memory: emif: add basic infrastructure for EMIF driver	2012-05-02 00:10:49 -07:00
mips	…
misc-devices	mei: Documentation: add generated example binary into .gitignore file	2012-05-14 15:43:44 -07:00
mmc	mmc: core: Fixup delayed work clock gating patch	2012-01-11 23:58:43 -05:00
mn10300	…
mtd	…
namespaces	…
netlabel	…
networking	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-05-22 19:22:50 -07:00
nfc	NFC: Update Documentation/nfc-hci.txt	2012-05-15 17:28:01 -04:00
parisc	Documentation: Fix typo in multiple files in Documentation	2012-04-16 14:37:13 +02:00
pcmcia	…
power	Power management updates for 3.5	2012-05-23 14:07:06 -07:00
powerpc	Revert "powerpc/hw-breakpoint: Use generic hw-breakpoint interfaces for new PPC ptrace flags"	2012-05-22 14:37:24 +10:00
pps	…
prctl	Documentation: prctl/seccomp_filter	2012-04-14 11:13:22 +10:00
pti	…
ptp	…
rapidio	…
s390	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
scheduler	sched: Remove stale power aware scheduling remnants and dysfunctional knobs	2012-05-17 13:48:56 +02:00
scsi	Merge branch 'delete-mca' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2012-05-23 17:12:06 -07:00
security	Smack: allow for significantly longer Smack labels v4	2012-05-14 22:48:38 -07:00
serial	serial: delete the MCA specific 8250 support.	2012-05-17 19:02:14 -04:00
sh	…
sound	Sound updates for 3.5-rc1	2012-05-23 13:05:43 -07:00
spi	spi: create a message queueing infrastructure	2012-03-07 19:19:48 -07:00
sysctl	net: doc: merge /proc/sys/net/core/* documents into one place	2012-04-27 00:09:26 -04:00
target	Documentation: Fix typo in tcm_mod_builder.py	2012-02-10 09:52:18 +01:00
telephony	…
thermal	thermal: Rename generate_netlink_event	2012-01-23 03:15:25 -05:00
timers	…
trace	tracing: Fix kconfig warning due to a typo	2012-05-08 14:17:25 +02:00
usb	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-05-22 19:22:50 -07:00
vDSO	…
video4linux	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2012-05-24 10:21:51 -07:00
virtual	Merge branch 'next' of git://git.kernel.org/pub/scm/virt/kvm/kvm	2012-05-24 16:17:30 -07:00
vm	proc: report file/anon bit in /proc/pid/pagemap	2012-05-31 17:49:29 -07:00
w1	…
watchdog	Documentation/watchdog: Fix the file descriptor leak when no cmdline arg given	2012-05-23 16:27:48 +02:00
wimax	…
x86	…
zh_CN	Fix a mistake sentence in the file 'Documentation/zh_CN/magic-number.txt'	2012-05-07 17:20:27 -07:00
.gitignore	…
00-INDEX	MCA: delete all remaining traces of microchannel bus support.	2012-05-17 19:06:13 -04:00
BUG-HUNTING	…
Changes	…
CodingStyle	CodingStyle: add kmalloc_array() to memory allocators	2012-05-31 17:49:26 -07:00
DMA-API-HOWTO.txt	…
DMA-API.txt	…
DMA-ISA-LPC.txt	…
DMA-attributes.txt	common: DMA-mapping: add NON-CONSISTENT attribute	2012-03-28 16:36:44 +02:00
HOWTO	docs: update HOWTO for 2.6.x -> 3.x versioning	2012-04-19 19:13:08 -07:00
IPMI.txt	…
IRQ-affinity.txt	…
IRQ-domain.txt	irq_domain: add documentation and MAINTAINERS entry.	2012-02-14 14:06:47 -07:00
IRQ.txt	…
Intel-IOMMU.txt	…
Makefile	mei: move doc files Documentation/misc-devices/mei	2012-05-09 13:59:09 -07:00
ManagementStyle	…
SAK.txt	…
SM501.txt	…
SecurityBugs	…
SubmitChecklist	…
SubmittingDrivers	…
SubmittingPatches	Documentation/SubmittingPatches: suggested the use of scripts/get_maintainer.pl	2012-05-25 16:18:30 +02:00
VGA-softcursor.txt	…
applying-patches.txt	…
atomic_ops.txt	doc: Add load/store guarantees to Documentation/atomic-ops.txt	2011-12-11 10:31:58 -08:00
bad_memory.txt	…
basic_profiling.txt	…
binfmt_misc.txt	…
braille-console.txt	…
bt8xxgpio.txt	…
btmrvl.txt	…
bus-virt-phys-mapping.txt	…
cachetlb.txt	…
circular-buffers.txt	…
clk.txt	Documentation: common clk API	2012-03-16 20:35:01 +00:00
coccinelle.txt	coccinelle.txt: update documentation to include M= option	2012-01-14 22:25:56 +01:00
cpu-hotplug.txt	documentation: remove references to cpu_*_map.	2012-03-29 15:38:31 +10:30
cpu-load.txt	…
cputopology.txt	…
crc32.txt	crc32: move long comment about crc32 fundamentals to Documentation/	2012-03-23 16:58:37 -07:00
dcdbas.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	…
dell_rbu.txt	…
devices.txt	Merge branch 'delete-mca' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2012-05-23 17:12:06 -07:00
digsig.txt	…
dma-buf-sharing.txt	dma-buf: add initial vmap documentation	2012-05-25 12:51:11 +05:30
dmaengine.txt	Documentation: Fix multiple typo in Documentation	2012-03-07 16:08:24 +01:00
dontdiff	Documentation: remove 'mach' from dontdiff file	2012-03-30 16:03:15 -07:00
dynamic-debug-howto.txt	dynamic_debug: update Documentation/*, Kconfig.debug	2012-04-30 16:26:30 -04:00
edac.txt	Documentation: Fix typo in multiple files in Documentation	2012-04-16 14:37:13 +02:00
eisa.txt	MCA: delete all remaining traces of microchannel bus support.	2012-05-17 19:06:13 -04:00
email-clients.txt	…
feature-removal-schedule.txt	MMC highlights for 3.5:	2012-05-25 08:23:32 -07:00
flexible-arrays.txt	…
futex-requeue-pi.txt	…
gcov.txt	…
gpio.txt	gpio: add flags to export GPIOs when requesting	2012-04-05 21:24:06 -07:00
highuid.txt	…
hw_random.txt	…
hwspinlock.txt	…
init.txt	…
initrd.txt	Documentation/initrd.txt: Change the location of util-linux	2012-05-25 16:18:34 +02:00
intel_txt.txt	…
io-mapping.txt	…
io_ordering.txt	…
iostats.txt	…
irqflags-tracing.txt	…
isapnp.txt	…
java.txt	…
kernel-doc-nano-HOWTO.txt	…
kernel-docs.txt	…
kernel-parameters.txt	Merge branch 'doc' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-05-28 10:40:11 -07:00
kmemcheck.txt	…
kmemleak.txt	kmemleak: Handle percpu memory allocation	2011-12-02 16:12:42 +00:00
kobject.txt	driver-core: documentation: fix up Greg's email address	2012-02-15 14:48:01 -08:00
kprobes.txt	…
kref.txt	…
ldm.txt	…
local_ops.txt	…
lockdep-design.txt	lockdep: Update documentation for lock-class leak detection	2011-12-11 10:31:23 -08:00
lockstat.txt	…
lockup-watchdogs.txt	watchdog: Update documentation	2012-02-11 15:11:28 +01:00
logo.gif	…
logo.txt	…
magic-number.txt	drivers/net: fix up stale paths from driver reorg	2012-01-30 12:54:40 -05:00
md.txt	md: create externally visible flags for supporting hot-replace.	2011-12-23 10:17:51 +11:00
media-framework.txt	[media] media: Add link_validate() op to check links to the sink pad	2012-05-14 08:44:11 -03:00
memory-barriers.txt	…
memory-hotplug.txt	Documentation: Fix typo in multiple files in Documentation	2012-04-16 14:37:13 +02:00
memory.txt	…
mono.txt	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
mutex-design.txt	…
nommu-mmap.txt	…
numastat.txt	Doc: Update numastat.txt	2012-02-28 16:05:06 +01:00
oops-tracing.txt	…
padata.txt	…
parport-lowlevel.txt	…
parport.txt	Documentation: remove references to /etc/modprobe.conf	2012-03-30 16:03:15 -07:00
pi-futex.txt	…
pinctrl.txt	pinctrl: implement devm_pinctrl_get()/put()	2012-04-18 13:53:13 +02:00
pnp.txt	…
preempt-locking.txt	…
printk-formats.txt	…
prio_tree.txt	…
ramoops.txt	pstore/ram: Add ECC support	2012-05-17 08:51:59 -07:00
rbtree.txt	…
remoteproc.txt	remoteproc: remove the single rpmsg vdev limitation	2012-03-06 19:14:12 +02:00
rfkill.txt	…
robust-futex-ABI.txt	…
robust-futexes.txt	…
rpmsg.txt	rpmsg: add virtio-based remote processor messaging bus	2012-02-08 22:53:58 +02:00
rt-mutex-design.txt	…
rt-mutex.txt	…
rtc.txt	…
serial-console.txt	…
sgi-ioc4.txt	…
sgi-visws.txt	…
sparse.txt	…
spinlocks.txt	…
stable_api_nonsense.txt	…
stable_kernel_rules.txt	stable: update documentation to ask for kernel version	2012-01-24 10:50:22 -08:00
static-keys.txt	Documentation: Fix typo in multiple files in Documentation	2012-04-16 14:37:13 +02:00
svga.txt	…
sysfs-rules.txt	…
sysrq.txt	Documentation: sysrq: Crutcher Dunnavant is unavailable	2012-03-30 16:03:15 -07:00
unaligned-memory-access.txt	…
unicode.txt	…
unshare.txt	…
vgaarbiter.txt	misc latin1 to utf8 conversions	2012-01-02 13:04:55 +01:00
video-output.txt	…
vme_api.txt	VME: Move API documentation to Documentation folder	2012-05-08 16:01:34 -07:00
volatile-considered-harmful.txt	…
workqueue.txt	…
xz.txt	…
zorro.txt	…