Shakeel Butt 1e577f970f mm, memcg: introduce memory.events.local ... The memory controller in cgroup v2 exposes memory.events file for each memcg which shows the number of times events like low, high, max, oom and oom_kill have happened for the whole tree rooted at that memcg. Users can also poll or register notification to monitor the changes in that file. Any event at any level of the tree rooted at memcg will notify all the listeners along the path till root_mem_cgroup. There are existing users which depend on this behavior. However there are users which are only interested in the events happening at a specific level of the memcg tree and not in the events in the underlying tree rooted at that memcg. One such use-case is a centralized resource monitor which can dynamically adjust the limits of the jobs running on a system. The jobs can create their sub-hierarchy for their own sub-tasks. The centralized monitor is only interested in the events at the top level memcgs of the jobs as it can then act and adjust the limits of the jobs. Using the current memory.events for such centralized monitor is very inconvenient. The monitor will keep receiving events which it is not interested and to find if the received event is interesting, it has to read memory.event files of the next level and compare it with the top level one. So, let's introduce memory.events.local to the memcg which shows and notify for the events at the memcg level. Now, does memory.stat and memory.pressure need their local versions. IMHO no due to the no internal process contraint of the cgroup v2. The memory.stat file of the top level memcg of a job shows the stats and vmevents of the whole tree. The local stats or vmevents of the top level memcg will only change if there is a process running in that memcg but v2 does not allow that. Similarly for memory.pressure there will not be any process in the internal nodes and thus no chance of local pressure. Link: http://lkml.kernel.org/r/20190527174643.209172-1-shakeelb@google.com Signed-off-by: Shakeel Butt <shakeelb@google.com> Reviewed-by: Roman Gushchin <guro@fb.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Chris Down <chris@chrisdown.name> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2019-07-12 11:05:43 -07:00
..
ABI	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2019-07-11 10:55:49 -07:00
EDID	docs: EDID/HOWTO.txt: convert it and rename to howto.rst	2019-06-14 14:32:29 -06:00
PCI	…
RCU	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
accelerators	docs: mark orphan documents as such	2019-06-08 13:42:11 -06:00
accounting	psi: introduce psi monitor	2019-05-14 19:52:48 -07:00
acpi/dsd	docs: fix broken documentation links	2019-06-08 13:42:13 -06:00
admin-guide	mm, memcg: introduce memory.events.local	2019-07-12 11:05:43 -07:00
aoe	docs: aoe: convert docs to ReST and rename to *.rst	2019-06-14 14:20:22 -06:00
arm	docs: mark orphan documents as such	2019-06-08 13:42:11 -06:00
arm64	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
auxdisplay	…
backlight	…
block	for-5.3/block-20190708	2019-07-09 10:45:06 -07:00
blockdev	zram: idle writeback fixes and cleanup	2019-01-08 17:15:10 -08:00
bpf	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2019-07-11 10:55:49 -07:00
bus-devices	…
cdrom	docs: ide: convert docs to ReST and rename to *.rst	2019-06-14 14:21:18 -06:00
cgroup-v1	for-5.3/block-20190708	2019-07-09 10:45:06 -07:00
cma	…
connector	…
console	…
core-api	asm-generic, x86: add bitops instrumentation for KASAN	2019-07-12 11:05:42 -07:00
cpu-freq	…
crypto	crypto: doc - Fix formatting of new crypto engine content	2019-07-03 22:13:12 +08:00
dev-tools	docs: kmemleak: add more documentation details	2019-07-12 11:05:42 -07:00
device-mapper	docs: convert docs to ReST and rename to *.rst	2019-06-14 14:21:04 -06:00
devicetree	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2019-07-11 10:55:49 -07:00
doc-guide	Doc : doc-guide : Fix a typo	2019-06-28 09:04:14 -06:00
driver-api	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2019-07-11 10:55:49 -07:00
driver-model	i2c: core: add device-managed version of i2c_new_dummy	2019-05-17 19:29:40 +02:00
early-userspace	…
fault-injection	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
fb	docs: fb: Add TER16x32 to the available font names	2019-06-20 13:55:20 -06:00
features	Documentation/stackprotector: powerpc supports stack protector	2019-06-14 14:44:43 -06:00
filesystems	Highlights:	2019-07-10 21:22:43 -07:00
firmware-guide	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
firmware_class	…
fpga	docs: fpga: convert docs to ReST and rename to *.rst	2019-06-14 14:21:15 -06:00
gpio	docs: gpio: convert docs to ReST and rename to *.rst	2019-04-23 23:30:07 +02:00
gpu	docs: mark orphan documents as such	2019-06-08 13:42:11 -06:00
hid	docs: stop suggesting strlcpy	2019-06-20 14:08:49 -06:00
hwmon	hwmon: (lm75) Add support for TMP75B	2019-05-03 13:16:18 -07:00
i2c	docs: stop suggesting strlcpy	2019-06-20 14:08:49 -06:00
ia64	…
ide	docs: ide: convert docs to ReST and rename to *.rst	2019-06-14 14:21:18 -06:00
iio	…
infiniband	Documentation/infiniband: update from locked to pinned_vm	2019-02-07 12:56:23 -07:00
input	doc: Change LXR references to elixir.bootlin.com	2019-02-01 16:05:03 -07:00
interconnect	docs: mark orphan documents as such	2019-06-08 13:42:11 -06:00
ioctl	seccomp: add a return code to trap to userspace	2018-12-11 16:28:41 -08:00
isdn	isdn: remove isdn4linux	2019-05-31 11:13:10 +02:00
kbuild	docs: kbuild: convert docs to ReST and rename to *.rst	2019-06-14 14:21:21 -06:00
kdump	docs: kdump: convert docs to ReST and rename to *.rst	2019-06-14 14:21:24 -06:00
kernel-hacking	docs: stop suggesting strlcpy	2019-06-20 14:08:49 -06:00
laptops	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
leds	docs: leds: convert to ReST	2019-06-28 20:57:31 +02:00
lightnvm	…
livepatch	docs/livepatch: Unify style of livepatch documentation in the ReST format	2019-05-07 16:06:28 -06:00
locking	locking/lockdep: Add explanation to lock usage rules in lockdep design doc	2019-06-03 11:55:48 +02:00
m68k	…
maintainer	docs: Add a document on repository management	2019-06-18 09:33:16 -06:00
md	…
media	media: doc-rst: Fix typos	2019-06-27 07:35:47 -04:00
memory-devices	…
mic	docs: mic: convert docs to ReST and rename to *.rst	2019-06-14 14:23:26 -06:00
mips	…
misc-devices	Documentation: add ibmvmc to toctree(index) and fix warnings	2019-01-14 08:37:17 -07:00
mmc	…
mtd	…
namespaces	…
netlabel	docs: netlabel: convert docs to ReST and rename to *.rst	2019-06-14 14:23:30 -06:00
networking	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2019-07-11 10:55:49 -07:00
nfc	…
nios2	…
nvdimm	Documentation: nvdimm: Fix typo	2019-06-07 11:39:04 -06:00
nvmem	…
openrisc	…
parisc	…
pcmcia	docs: pcmcia: convert docs to ReST and rename to *.rst	2019-06-14 14:23:35 -06:00
perf	Documentation: perf: Add documentation for ThunderX2 PMU uncore driver	2018-12-06 12:29:47 +00:00
phy	…
power	PM/EM: Document the Energy Model framework	2019-01-27 12:29:37 +01:00
powerpc	docs: kdump: convert docs to ReST and rename to *.rst	2019-06-14 14:21:24 -06:00
process	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2019-07-11 10:55:49 -07:00
pti	…
rapidio	…
riscv	docs: riscv: convert docs to ReST and rename to *.rst	2019-06-14 14:31:32 -06:00
s390	docs: s390: s390dbf: typos and formatting, update crash command	2019-07-05 13:42:24 +02:00
scheduler	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
scsi	scsi: ufs-bsg: Allow reading descriptors	2019-02-27 09:00:02 -05:00
security	Revert "Merge tag 'keys-acl-20190703' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs"	2019-07-10 18:43:43 -07:00
serial	docs: serial: convert docs to ReST and rename to *.rst	2019-04-25 11:37:42 +02:00
sh	sh: remove board_time_init() callback	2018-12-18 16:13:04 +01:00
sound	ALSA: doc: my_chip has no element ioport	2019-04-03 11:55:47 +02:00
sparc	docs: sparc: convert to ReST	2019-05-08 17:13:35 -07:00
sphinx	docs: automarkup.py: ignore exceptions when seeking for xrefs	2019-07-08 14:35:47 -06:00
sphinx-static	…
spi	spi-summary: document set_cs_timing	2019-04-08 14:13:43 +07:00
sysctl	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
target	docs: target: convert docs to ReST and rename to *.rst	2019-06-14 14:31:36 -06:00
thermal	docs: hwmon: Add an index file and rename docs to *.rst	2019-04-17 10:37:23 -07:00
timers	docs: timers: convert docs to ReST and rename to *.rst	2019-06-14 14:31:48 -06:00
trace	docs: trace: add a missing blank line	2019-06-20 14:05:46 -06:00
translations	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
usb	USB: rio500: update Documentation	2019-05-21 10:11:19 +02:00
userspace-api	Documentation: Add section about CPU vulnerabilities for Spectre	2019-06-26 11:42:41 -06:00
virtual	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
vm	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
w1	…
watchdog	docs: watchdog: convert docs to ReST and rename to *.rst	2019-06-14 14:32:05 -06:00
wimax	…
x86	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
xilinx	docs: xilinx: convert eemi.txt to eemi.rst	2019-06-14 14:32:10 -06:00
xtensa	xtensa: document boot parameter passing	2019-02-03 18:06:19 -08:00
.gitignore	…
Changes	…
CodingStyle	…
DMA-API-HOWTO.txt	DMA mapping updates for 5.2	2019-05-09 08:40:55 -07:00
DMA-API.txt	Documentation: DMA-API: fix a function name of max_mapping_size	2019-06-07 11:10:33 -06:00
DMA-ISA-LPC.txt	Documentation/DMA-ISA-LPC: fix an incorrect reference	2019-02-11 08:23:07 -07:00
DMA-attributes.txt	…
IPMI.txt	…
IRQ-affinity.txt	…
IRQ-domain.txt	…
IRQ.txt	…
Intel-IOMMU.txt	…
Kconfig	docs: Kbuild/Makefile: allow check for missing docs at build time	2019-06-07 11:33:16 -06:00
Makefile	docs: Kbuild/Makefile: allow check for missing docs at build time	2019-06-07 11:33:16 -06:00
SAK.txt	…
SM501.txt	…
SubmittingPatches	…
atomic_bitops.txt	docs: atomic_bitops.txt: add a title for this document	2019-04-11 12:37:02 -06:00
atomic_t.txt	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-07-08 16:12:03 -07:00
bt8xxgpio.txt	…
btmrvl.txt	…
bus-virt-phys-mapping.txt	…
clearing-warn-once.txt	A reasonably busy cycle for docs, including:	2019-05-08 12:42:50 -07:00
conf.py	Disable Sphinx SmartyPants in HTML output	2019-06-30 15:30:34 -06:00
cpu-load.txt	…
cputopology.txt	topology: Create core_cpus and die_cpus sysfs attributes	2019-05-23 10:08:34 +02:00
crc32.txt	…
dcdbas.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	…
dell_rbu.txt	…
digsig.txt	…
docutils.conf	doc-rst: Add missing newline at end of file	2019-06-20 14:16:56 -06:00
dontdiff	A reasonably busy cycle for docs, including:	2019-05-08 12:42:50 -07:00
efi-stub.txt	…
eisa.txt	…
futex-requeue-pi.txt	…
gcc-plugins.txt	…
highuid.txt	…
hw_random.txt	…
hwspinlock.txt	…
index.rst	Documentation: Remove duplicate x86 index entry	2019-06-14 11:02:13 -06:00
intel_txt.txt	…
io-mapping.txt	…
io_ordering.txt	…
iostats.txt	block: document iostat changes for disk busy time accounting	2019-06-14 14:46:43 -06:00
irqflags-tracing.txt	…
isa.txt	…
isapnp.txt	…
kernel-per-CPU-kthreads.txt	docs: watchdog: convert docs to ReST and rename to *.rst	2019-06-14 14:32:05 -06:00
kobject.txt	kref/kobject: Improve documentation	2018-12-06 13:57:03 +01:00
kprobes.txt	Merge branch 'parisc-5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux	2019-05-07 19:34:17 -07:00
kref.txt	…
ldm.txt	…
lockup-watchdogs.txt	…
logo.gif	…
logo.txt	…
lsm.txt	…
lzo.txt	lib/lzo: fix bugs for very short or empty input	2019-04-05 16:02:30 -10:00
mailbox.txt	…
memory-barriers.txt	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
men-chameleon-bus.txt	…
nommu-mmap.txt	…
ntb.txt	docs: ntb.txt: add blank lines to clean up some Sphinx warnings	2019-04-11 12:37:03 -06:00
numastat.txt	…
packing.txt	lib: Add support for generic packing operations	2019-05-03 10:49:17 -04:00
padata.txt	…
parport-lowlevel.txt	…
percpu-rw-semaphore.txt	…
phy.txt	…
pi-futex.txt	…
pnp.txt	…
preempt-locking.txt	x86/fpu: Remove fpu__restore()	2019-04-09 19:27:42 +02:00
pwm.txt	pwm: Add power management descriptions	2019-06-26 11:39:11 +02:00
rbtree.txt	…
remoteproc.txt	…
rfkill.txt	…
robust-futex-ABI.txt	…
robust-futexes.txt	futex: Update comments and docs about return values of arch futex code	2019-04-26 13:57:55 +01:00
rpmsg.txt	…
rtc.txt	Documentation: rtc: Correct location of rtctest.c	2019-03-25 10:34:55 -06:00
sgi-ioc4.txt	…
siphash.txt	…
smsc_ece1099.txt	…
speculation.txt	docs: speculation.txt: mark example blocks as such	2019-04-11 12:37:03 -06:00
static-keys.txt	static_keys.txt: Fix trivial spelling mistake	2019-02-06 16:44:16 -07:00
svga.txt	…
switchtec.txt	…
sync_file.txt	…
tee.txt	Documentation: tee: Grammar s/the its/its/	2019-06-07 11:23:38 -06:00
this_cpu_ops.txt	…
unaligned-memory-access.txt	docs: unaligned-memory-access.txt: use a lowercase title	2019-04-11 12:37:03 -06:00
vfio-mediated-device.txt	…
vfio.txt	…
video-output.txt	docs: video-output.txt: convert it to ReST format	2019-04-11 12:37:03 -06:00
xillybus.txt	…
xz.txt	…
zorro.txt	…