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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
..
bpf This is the 4.19.149 stable release 2020-10-01 16:49:05 +02:00
cgroup BACKPORT: cgroup: make per-cgroup pressure stall tracking configurable 2021-07-01 23:43:00 -07:00
configs ANDROID: remove android config fragments 2018-08-28 17:15:17 +05:30
debug Merge android-4.19-stable.157 (8ee67bc) into msm-4.19 2020-12-18 18:35:06 +05:30
dma Merge android-4.19-stable.125 (a483478) into msm-4.19 2020-09-20 23:45:10 +05:30
events Revert "ANDROID: security,perf: Allow further restriction of perf_event_open" 2021-04-30 00:21:50 -07:00
gcov This is the 4.19.146 stable release 2020-09-17 13:59:19 +02:00
irq Merge android-4.19-stable.146 (443485d) into msm-4.19 2020-10-16 11:06:31 +05:30
livepatch livepatch: Nullify obj->mod in klp_module_coming()'s error path 2019-10-07 18:57:10 +02:00
locking Merge android-4.19-stable.146 (443485d) into msm-4.19 2020-10-16 11:06:31 +05:30
power Merge android-4.19-stable.157 (8ee67bc) into msm-4.19 2020-12-18 18:35:06 +05:30
printk Merge android-4.19-stable.149 (9ce79d9) into msm-4.19 2020-10-21 09:25:49 +05:30
rcu Merge android-4.19.110 (1984fff) into msm-4.19 2020-05-23 05:08:22 -07:00
sched BACKPORT: cgroup: make per-cgroup pressure stall tracking configurable 2021-07-01 23:43:00 -07:00
time Merge "Merge android-4.19-stable.152 (13abe23) into msm-4.19" 2020-11-10 06:31:20 -08:00
trace Merge android-4.19-stable.157 (8ee67bc) into msm-4.19 2020-12-18 18:35:06 +05:30
.gitignore BACKPORT: Provide in-kernel headers to make extending kernel easier 2019-06-12 12:33:20 +00:00
acct.c acct_on(): don't mess with freeze protection 2019-05-31 06:46:05 -07:00
async.c
audit.c audit: fix a net reference leak in audit_list_rules_send() 2020-06-22 09:05:13 +02:00
audit.h audit: fix a net reference leak in audit_list_rules_send() 2020-06-22 09:05:13 +02:00
audit_fsnotify.c
audit_tree.c audit: Embed key into chunk 2019-12-13 08:51:11 +01:00
audit_watch.c audit: CONFIG_CHANGE don't log internal bookkeeping as an event 2020-10-01 13:14:33 +02:00
auditfilter.c audit: fix a net reference leak in audit_list_rules_send() 2020-06-22 09:05:13 +02:00
auditsc.c audit: print empty EXECVE args 2019-12-01 09:17:17 +01:00
backtracetest.c
bounds.c kbuild: fix kernel/bounds.c 'W=1' warning 2018-11-13 11:08:47 -08:00
capability.c LSM: generalize flag passing to security_capable 2020-01-23 08:21:29 +01:00
cfi.c ANDROID: cfi: fix export symbol types 2020-04-29 19:16:15 +02:00
compat.c make 'user_access_begin()' do 'access_ok()' 2020-06-22 09:04:58 +02:00
configs.c
context_tracking.c
cpu.c Merge android-4.19-stable.136 (204dd19) into msm-4.19 2020-10-14 20:04:29 +05:30
cpu_pm.c Merge android-4.19-stable.136 (204dd19) into msm-4.19 2020-10-14 20:04:29 +05:30
crash_core.c kernel/crash_core.c: print timestamp using time64_t 2018-08-22 10:52:47 -07:00
crash_dump.c
cred.c memcg: account security cred as well to kmemcg 2020-01-09 10:19:00 +01:00
delayacct.c UPSTREAM: delayacct: track delays from thrashing cache pages 2019-03-21 16:25:26 -07:00
dma.c
elfcore.c kernel/elfcore.c: include proper prototypes 2019-10-11 18:21:23 +02:00
exec_domain.c
exit.c Merge android-4.19-stable.136 (204dd19) into msm-4.19 2020-10-14 20:04:29 +05:30
extable.c
fail_function.c
fork.c Merge android-4.19-stable.157 (8ee67bc) into msm-4.19 2020-12-18 18:35:06 +05:30
freezer.c PM / reboot: Eliminate race between reboot and suspend 2018-08-06 12:35:20 +02:00
futex.c futex: Handle transient "ownerless" rtmutex state correctly 2020-11-10 12:35:58 +01:00
gen_kheaders.sh kheaders: include only headers into kheaders_data.tar.xz 2020-06-11 05:00:06 -07:00
groups.c
hung_task.c hung task: check specific tasks for long uninterruptible sleep state 2019-08-02 12:42:25 -07:00
iomem.c
irq_work.c irq_work: Do not raise an IPI when queueing work on the local CPU 2019-05-31 06:46:19 -07:00
jump_label.c jump_label: move 'asm goto' support test to Kconfig 2019-06-04 08:02:34 +02:00
kallsyms.c Merge 4.19.133 into android-4.19-stable 2020-07-17 07:54:52 +02:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks locking/rwsem: for rwsem prio aware enhancement 2019-05-24 15:32:11 +08:00
Kconfig.preempt kconfig: include kernel/Kconfig.preempt from init/Kconfig 2018-08-02 08:06:54 +09:00
kcov.c UPSTREAM: kcov: remote coverage support 2020-01-15 14:51:23 +00:00
kexec.c
kexec_core.c kexec: Allocate decrypted control pages for kdump if SME is enabled 2019-11-24 08:20:29 +01:00
kexec_file.c
kexec_internal.h
kheaders.c BACKPORT: kheaders: Move from proc to sysfs 2019-06-12 12:33:54 +00:00
kmod.c kmod: make request_module() return an error when autoloading is disabled 2020-04-17 10:48:52 +02:00
kprobes.c kprobes: Fix compiler warning for !CONFIG_KPROBES_ON_FTRACE 2020-10-01 13:14:54 +02:00
ksysfs.c
kthread.c This is the 4.19.156 stable release 2020-11-10 13:23:09 +01:00
latencytop.c
Makefile Merge android-4.19.95 (5da1114) into msm-4.19 2020-03-27 10:48:20 -07:00
memremap.c mm/memory_hotplug: shrink zones when offlining memory 2020-01-29 16:43:27 +01:00
module-internal.h
module.c Merge android-4.19-stable.146 (443485d) into msm-4.19 2020-10-16 11:06:31 +05:30
module_signing.c
notifier.c Merge "Merge android-4.19-stable.113 (2b82910d) into msm-4.19" 2020-07-24 22:21:24 -07:00
nsproxy.c
padata.c padata: purge get_cpu and reorder_via_wq from padata_do_serial 2020-05-27 17:37:36 +02:00
panic.c Merge android-4.19-stable.125 (a483478) into msm-4.19 2020-09-20 23:45:10 +05:30
params.c ANDROID: GKI: export symbols from abi_gki_aarch64_qcom_whitelist 2020-04-13 21:36:41 +00:00
pid.c UPSTREAM: pid: add pidfd_open() 2019-08-12 13:36:37 -04:00
pid_namespace.c signal/pid_namespace: Fix reboot_pid_ns to use send_sig not force_sig 2019-07-26 09:14:01 +02:00
profile.c
ptrace.c ptrace: reintroduce usage of subjective credentials in ptrace_has_cap() 2020-01-23 08:21:29 +01:00
range.c
reboot.c UPSTREAM: GKI: panic/reboot: allow specifying reboot_mode for panic only 2020-04-17 05:00:40 +00:00
relay.c kernel/relay.c: fix memleak on destroy relay channel 2020-08-26 10:30:59 +02:00
resource.c resource: fix locking in find_next_iomem_res() 2019-09-16 08:22:20 +02:00
rseq.c
scs.c FROMLIST: scs: add support for stack usage debugging 2019-11-27 12:37:25 -08:00
seccomp.c LSM: generalize flag passing to security_capable 2020-01-23 08:21:29 +01:00
signal.c signal: Avoid corrupting si_pid and si_uid in do_notify_parent 2021-03-25 22:32:03 -07:00
smp.c smp: Wake up all idle CPUs when suspending to idle 2019-03-15 01:59:15 -07:00
smpboot.c
smpboot.h
softirq.c trace: Add trace points for tasklet entry/exit 2020-01-28 20:45:01 -08:00
stacktrace.c
stop_machine.c Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-08-13 11:25:07 -07:00
sys.c This is the 4.19.149 stable release 2020-10-01 16:49:05 +02:00
sys_ni.c UPSTREAM: signal: support CLONE_PIDFD with pidfd_send_signal 2019-08-12 13:36:37 -04:00
sysctl.c sched/walt: Improve the scheduler 2020-10-06 12:41:10 +05:30
sysctl_binary.c netfilter: nf_defrag_ipv4: Add sysctl to disable per interface 2018-12-03 15:57:38 -08:00
task_work.c
taskstats.c taskstats: extended taskstats2 with acct fields 2020-05-13 22:59:08 -07:00
test_kprobes.c
torture.c
tracepoint.c tracepoint: Fix tracepoint array element size mismatch 2018-10-17 15:35:29 -04:00
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c usermodehelper: reset umask to default before executing user process 2020-10-14 10:31:21 +02:00
up.c
user-return-notifier.c
user.c ANDROID: proc: Add /proc/uid directory 2019-03-06 15:59:21 +00:00
user_namespace.c userns: also map extents in the reverse map to kernel IDs 2018-11-13 11:09:00 -08:00
utsname.c
utsname_sysctl.c sys: don't hold uts_sem while accessing userspace memory 2018-08-11 02:05:53 -05:00
watchdog.c Merge android-4.19.110 (1984fff) into msm-4.19 2020-05-23 05:08:22 -07:00
watchdog_hld.c watchdog: Mark watchdog touch functions as notrace 2018-08-30 12:56:40 +02:00
workqueue.c Merge android-4.19-stable.125 (a483478) into msm-4.19 2020-09-20 23:45:10 +05:30
workqueue_internal.h UPSTREAM: psi: fix aggregation idle shut-off 2019-03-21 16:25:27 -07:00