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Suren Baghdasaryan f7c2472acb 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: 92c6dd6a650e1c9161b3e9b37cb7e34b98c32b06
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 Doc: misc-devices: move lcd-panel-cgram.txt to auxdisplay/ 2018-04-12 16:08:02 +02:00
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 page cache: use xa_lock 2018-04-11 10:28:39 -07:00
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 cpufreq: Drop cpufreq_table_validate_and_show() 2018-04-10 08:40:45 +02:00
cpuidle cpuidle: Add definition of residency to sysfs documentation 2018-04-09 13:44:37 +02:00
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 This is the 4.19.149 stable release 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 This is the 4.19.155 stable release 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 This is the 4.19.116 stable release 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