Suren Baghdasaryan 90e75b027a BACKPORT: cgroup: make per-cgroup pressure stall tracking configurable ... PSI accounts stalls for each cgroup separately and aggregates it at each level of the hierarchy. This causes additional overhead with psi_avgs_work being called for each cgroup in the hierarchy. psi_avgs_work has been highly optimized, however on systems with large number of cgroups the overhead becomes noticeable. Systems which use PSI only at the system level could avoid this overhead if PSI can be configured to skip per-cgroup stall accounting. Add "cgroup_disable=pressure" kernel command-line option to allow requesting system-wide only pressure stall accounting. When set, it keeps system-wide accounting under /proc/pressure/ but skips accounting for individual cgroups and does not expose PSI nodes in cgroup hierarchy. Signed-off-by: Suren Baghdasaryan <surenb@google.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Tejun Heo <tj@kernel.org> Link: https://lore.kernel.org/patchwork/patch/1435705 (cherry picked from commit 3958e2d0c34e18c41b60dc01832bd670a59ef70f https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git tj) Conflicts: include/linux/cgroup-defs.h kernel/cgroup/cgroup.c 1. Trivial merge conflict in cgroup-defs.h due to missing CFTYPE_DEBUG 2. Changed flags to (CFTYPE_NOT_ON_ROOT | CFTYPE_PRESSURE) in cgroup.c because in 4.19 psi files were allowed only in non-root cgroups. Bug: 178872719 Bug: 191734423 Signed-off-by: Suren Baghdasaryan <surenb@google.com> Change-Id: Ifc8fbc52f9a1131d7c2668edbb44c525c76c3360 Git-commit: 92c6dd6a65 Git-repo: https://android.googlesource.com/kernel/common/ Signed-off-by: Srinivasarao P <spathi@codeaurora.org>		2021-07-01 23:43:00 -07:00
..
ABI	Merge android-4.19-stable.146 (443485d) into msm-4.19	2020-10-16 11:06:31 +05:30
accelerators	ocxl: Document new OCXL IOCTLs	2018-06-03 20:40:33 +10:00
accounting	FROMLIST: psi: introduce psi monitor	2019-03-22 23:07:14 +00:00
acpi	ACPI: property: graph: Update graph documentation to use generic references	2018-07-23 12:44:52 +02:00
admin-guide	BACKPORT: cgroup: make per-cgroup pressure stall tracking configurable	2021-07-01 23:43:00 -07:00
aoe
arm	msm: rdbg: Add snapshot of remote debugger driver	2019-06-08 10:30:42 +05:30
arm64	Merge android-4.19-stable.125 (a483478) into msm-4.19	2020-09-20 23:45:10 +05:30
auxdisplay
backlight
block	File and metadata encryption changes from android-4.19.96-107	2020-04-21 06:19:04 -07:00
blockdev	zram: make deduplication feature optional	2019-08-01 22:24:02 -07:00
bpf	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2018-08-07 11:02:05 -07:00
bus-devices
cdrom
cgroup-v1
cma
connector
console	Documentation: corrections to console/console.txt	2018-08-10 16:09:40 -06:00
core-api	UPSTREAM: timekeeping: Boot should be boottime for coarse ns accessor	2020-10-25 11:48:11 +01:00
cpu-freq
cpuidle
crypto	Revert existing FBE changes for ICE FBE	2020-04-24 15:19:09 -07:00
dev-tools	UPSTREAM: kcov: fix struct layout for kcov_remote_arg	2020-01-15 14:52:07 +00:00
device-mapper	Merge android-4.19.32 (6f994bf) into msm-4.19	2019-05-09 00:12:14 -07:00
devicetree	Merge 4.19.149 into android-4.19-stable	2020-10-01 16:49:05 +02:00
doc-guide	Documentation/sphinx: allow "functions" with no parameters	2018-06-30 07:52:42 -06:00
driver-api	Merge android-4.19-stable.149 (9ce79d9) into msm-4.19	2020-10-21 09:25:49 +05:30
driver-model	FROMGIT: docs: driver-model: Add documentation for sync_state	2019-10-24 14:23:14 -07:00
early-userspace	initramfs: move gen_initramfs_list.sh from scripts/ to usr/	2018-08-22 23:21:44 +09:00
EDID
extcon
fault-injection
fb	uvesafb: Fix URLs in the documentation	2018-09-26 18:11:23 +02:00
features	ARM: 8777/1: Hook up SYNC_CORE functionality for sys_membarrier()	2018-07-11 11:02:08 +01:00
filesystems	fscrypt: return -EXDEV for incompatible rename or link into encrypted dir	2020-11-05 11:08:35 +01:00
firmware_class
fmc
fpga	docs: fpga: add a document for FPGA Device Feature List (DFL) Framework Overview	2018-07-15 13:55:44 +02:00
gpio
gpu	drm/msm/gpu: Add the buffer objects from the submit to the crash dump	2018-07-30 08:50:10 -04:00
hid	HID: doc: fix wrong data structure reference for UHID_OUTPUT	2019-12-05 09:20:36 +01:00
hwmon	hwmon: (ina2xx) fix sysfs shunt resistor read access	2018-08-26 17:45:25 -07:00
i2c	i2c: i801: Add support for Intel Comet Lake	2019-05-04 09:20:15 +02:00
ia64
ide
iio
infiniband
input	input: add MT_TOOL_DIAL	2018-07-17 15:33:47 +02:00
ioctl	Char/Misc driver patches for 4.19-rc1	2018-08-18 11:04:51 -07:00
isdn
kbuild	kbuild: support LLVM=1 to switch the default tools to Clang/LLVM	2020-09-26 18:01:32 +02:00
kdump
kernel-hacking	doc:it_IT: translation for kernel-hacking	2018-07-26 16:21:09 -06:00
laptops	platform/x86: thinkpad_acpi: silence HKEY 0x6032, 0x60f0, 0x6030	2018-05-07 15:10:31 +03:00
leds
lightnvm
livepatch	livepatch: Remove not longer valid limitations from the documentation	2018-05-24 15:37:57 +02:00
locking	locking: Implement an algorithm choice for Wound-Wait mutexes	2018-07-03 09:44:36 +02:00
m68k
maintainer	docs: Fix more broken references	2018-06-15 18:11:26 -03:00
md
media	Merge 4.19.155 into android-4.19-stable	2020-11-05 14:02:27 +01:00
memory-devices
mic
mips
misc-devices	pci_endpoint_test: Add 2 ioctl commands	2018-07-19 11:46:57 +01:00
mmc	Revert "mmc: driver's changes from kernel msm-4.14 to msm-4.19"	2019-05-13 13:12:22 +05:30
mtd
namespaces
netlabel
networking	Merge android-4.19-stable.157 (8ee67bc) into msm-4.19	2020-12-18 18:35:06 +05:30
nfc
nios2
nvdimm
nvmem
openrisc
parisc
PCI	Merge branch 'remotes/lorenzo/pci/dwc'	2018-08-15 14:59:11 -05:00
pcmcia	pcmcia: remove long deprecated pcmcia_request_exclusive_irq() function	2018-08-18 12:30:42 -07:00
perf	perf: add qcom l2 cache perf events driver	2019-12-26 12:45:54 +05:30
phy
platform
power	ANDROID: GKI: QoS: Enhance framework to support cpu/irq specific QoS requests	2020-04-08 16:37:25 +00:00
powerpc	powerpc: Document issues with TM on POWER9	2018-07-02 23:54:29 +10:00
pps
process	stable-kernel-rules.rst: add link to networking patch queue	2019-03-23 20:10:10 +01:00
pti
ptp
rapidio
RCU	rculist: Improve documentation for list_for_each_entry_from_rcu()	2018-07-12 15:39:25 -07:00
riscv	perf: riscv: Add Document for Future Porting Guide	2018-06-04 14:02:11 -07:00
s390
scheduler	ANDROID: sched/tune: Move SchedTune cpu API into UtilClamp wrappers	2020-02-01 15:03:17 +00:00
scsi	scsi: documentation: add scsi_mod.use_blk_mq to scsi-parameters	2018-08-27 12:26:10 -04:00
security	Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables	2018-06-14 12:21:18 +09:00
serial
sh
sound	Merge 4.19.116 into android-4.19	2020-04-18 13:33:51 +02:00
sparc
sphinx	doc: Cope with Sphinx logging deprecations	2019-06-09 09:17:21 +02:00
sphinx-static
spi
sysctl	Revert "ANDROID: security,perf: Allow further restriction of perf_event_open"	2021-04-30 00:21:50 -07:00
target
thermal
timers	timekeeping.txt: Correct maxCount of n-bit binary counter	2018-07-23 09:33:06 -06:00
trace	This was a moderately busy cycle for docs, with the usual collection of	2018-08-14 14:29:31 -07:00
translations	This was a moderately busy cycle for docs, with the usual collection of	2018-08-14 14:29:31 -07:00
usb	UPSTREAM: usb: raw-gadget: documentation updates	2020-06-01 22:15:34 +02:00
userspace-api	Documentation: Add section about CPU vulnerabilities for Spectre	2019-07-14 08:11:17 +02:00
virtual	x86/kvm/hyper-v: Explicitly align hcall param for kvm_hyperv_exit	2020-06-22 09:05:12 +02:00
vm	docs/vm: move ksm and transhuge from "user" to "internals" section.	2018-05-29 06:45:55 -06:00
w1	w1: fix w1_ds2438 documentation	2018-07-07 17:27:13 +02:00
watchdog
wimax
x86	x86/speculation/taa: Add documentation for TSX Async Abort	2019-11-12 19:21:34 +01:00
xtensa
.gitignore
00-INDEX	docs: admin-guide: add cgroup-v2 documentation	2018-05-10 15:42:41 -06:00
atomic_bitops.txt
atomic_t.txt	x86/atomic: Fix smp_mb__{before,after}_atomic()	2019-07-26 09:14:08 +02:00
bt8xxgpio.txt
btmrvl.txt
bus-virt-phys-mapping.txt
Changes
clearing-warn-once.txt
CodingStyle
conf.py	docs: Fix conf.py for Sphinx 2.0	2019-06-09 09:17:20 +02:00
cpu-load.txt
cputopology.txt
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt	Documentation: remove stale firmware API reference	2018-05-14 16:44:41 +02:00
digsig.txt
DMA-API-HOWTO.txt
DMA-API.txt
DMA-attributes.txt	iommu/arm-smmu: Merge of smmu changes from 4.14 to msm-kona	2018-07-19 19:33:35 -07:00
DMA-ISA-LPC.txt
docutils.conf
dontdiff	unicode: refactor the rule for regenerating utf8data.h	2019-09-23 13:23:29 -07:00
efi-stub.txt
eisa.txt
flexible-arrays.txt
futex-requeue-pi.txt
gcc-plugins.txt
highuid.txt
hw_random.txt
hwspinlock.txt
index.rst	x86/speculation/mds: Add mds_clear_cpu_buffers()	2019-05-14 19:17:54 +02:00
Intel-IOMMU.txt
intel_txt.txt
io-mapping.txt
io_ordering.txt
iostats.txt	block: Track DISCARD statistics and output them in stat and diskstat	2018-07-18 08:44:22 -06:00
IPMI.txt
IRQ-affinity.txt
IRQ-domain.txt
IRQ.txt
irqflags-tracing.txt
isa.txt
isapnp.txt
kernel-per-CPU-kthreads.txt
kobject.txt
kprobes.txt	kprobes/Documentation: Fix various typos	2018-06-22 11:10:55 +02:00
kref.txt
ldm.txt
lockup-watchdogs.txt
logo.gif
logo.txt
lsm.txt
lzo.txt
mailbox.txt
Makefile
memory-barriers.txt	sched/Documentation: Update wake_up() & co. memory-barrier guarantees	2018-07-17 09:30:34 +02:00
memory-hotplug.txt
men-chameleon-bus.txt
mhi.txt	mhi: add snapshot for MHI driver stack	2018-09-13 13:00:59 -07:00
nommu-mmap.txt	Documentation: nommu-map: Fix duplicate word typo	2018-06-26 09:01:27 -06:00
ntb.txt
numastat.txt
padata.txt
parport-lowlevel.txt
percpu-rw-semaphore.txt
phy.txt
pi-futex.txt
pnp.txt
preempt-locking.txt
pwm.txt
rbtree.txt
remoteproc.txt
rfkill.txt	rfkill: Fix several typos in documentation	2018-06-15 13:36:08 +02:00
robust-futex-ABI.txt
robust-futexes.txt	futex: Update comments and docs about return values of arch futex code	2019-07-03 13:14:49 +02:00
rpmsg.txt
rtc.txt
SAK.txt
sgi-ioc4.txt
siphash.txt
SM501.txt
smsc_ece1099.txt
speculation.txt
static-keys.txt
SubmittingPatches
svga.txt
switchtec.txt
sync_file.txt
tee.txt
this_cpu_ops.txt
unaligned-memory-access.txt
vfio-mediated-device.txt	vfio/mdev: Check globally for duplicate devices	2018-06-08 10:24:27 -06:00
vfio.txt	vfio: fix documentation	2018-05-08 09:16:41 -06:00
video-output.txt
xillybus.txt
xz.txt
zorro.txt