Ionela Voinescu fa50e2b452 sched/topology: Condition EAS enablement on FIE support ... In order to make accurate predictions across CPUs and for all performance states, Energy Aware Scheduling (EAS) needs frequency-invariant load tracking signals. EAS task placement aims to minimize energy consumption, and does so in part by limiting the search space to only CPUs with the highest spare capacity (CPU capacity - CPU utilization) in their performance domain. Those candidates are the placement choices that will keep frequency at its lowest possible and therefore save the most energy. But without frequency invariance, a CPU's utilization is relative to the CPU's current performance level, and not relative to its maximum performance level, which determines its capacity. As a result, it will fail to correctly indicate any potential spare capacity obtained by an increase in a CPU's performance level. Therefore, a non-invariant utilization signal would render the EAS task placement logic invalid. Now that we properly report support for the Frequency Invariance Engine (FIE) through arch_scale_freq_invariant() for arm and arm64 systems, while also ensuring a re-evaluation of the EAS use conditions for possible invariance status change, we can assert this is the case when initializing EAS. Warn and bail out otherwise. Suggested-by: Quentin Perret <qperret@google.com> Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20201027180713.7642-4-ionela.voinescu@arm.com		2020-11-19 11:25:47 +01:00
..
bpf	Fixes for 5.10-rc1 from the networking tree:	2020-10-23 12:05:49 -07:00
cgroup	cpuset: fix race between hotplug work and later CPU offline	2020-11-19 11:25:45 +01:00
configs	compiler: remove CONFIG_OPTIMIZE_INLINING entirely	2020-04-07 10:43:42 -07:00
debug	kdb: Fix pager search for multi-line strings	2020-10-01 14:44:08 +01:00
dma	dma-mapping: move more functions to dma-map-ops.h	2020-10-20 10:41:07 +02:00
entry	arch-cleanup-2020-10-22	2020-10-23 10:06:38 -07:00
events	task_work: cleanup notification modes	2020-10-17 15:05:30 -06:00
gcov	gcov: add support for GCC 10.1	2020-09-11 09:33:54 -07:00
irq	task_work: cleanup notification modes	2020-10-17 15:05:30 -06:00
kcsan	kernel/: fix repeated words in comments	2020-10-16 11:11:19 -07:00
livepatch	kernel/: fix repeated words in comments	2020-10-16 11:11:19 -07:00
locking	Merge tag 'core-rcu-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2020-10-18 14:34:50 -07:00
power	kernel/: fix repeated words in comments	2020-10-16 11:11:19 -07:00
printk	Urgent printk fix for 5.10	2020-10-16 12:52:37 -07:00
rcu	Merge tag 'core-rcu-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2020-10-18 14:34:50 -07:00
sched	sched/topology: Condition EAS enablement on FIE support	2020-11-19 11:25:47 +01:00
time	random32: add noise from network and scheduling activity	2020-10-24 20:21:57 +02:00
trace	Fix synthetic event "strcat" overrun	2020-10-28 12:05:14 -07:00
.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
acct.c	kernel: acct.c: fix some kernel-doc nits	2020-10-16 11:11:19 -07:00
async.c	treewide: Remove uninitialized_var() usage	2020-07-16 12:35:15 -07:00
audit.c	audit: Remove redundant null check	2020-08-26 09:10:39 -04:00
audit.h	audit: change unnecessary globals into statics	2020-08-17 20:26:58 -04:00
audit_fsnotify.c	fsnotify: create method handle_inode_event() in fsnotify_operations	2020-07-27 23:25:50 +02:00
audit_tree.c	\n	2020-08-06 19:29:51 -07:00
audit_watch.c	fsnotify: create method handle_inode_event() in fsnotify_operations	2020-07-27 23:25:50 +02:00
auditfilter.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
auditsc.c	audit/stable-5.9 PR 20200803	2020-08-04 14:20:26 -07:00
backtracetest.c	treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD()	2020-07-30 11:15:58 -07:00
bounds.c
capability.c	LSM: Signal to SafeSetID when setting group IDs	2020-10-13 09:17:34 -07:00
compat.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
configs.c
context_tracking.c	context_tracking: Ensure that the critical path cannot be instrumented	2020-06-11 15:14:36 +02:00
cpu.c	sched/hotplug: Consolidate task migration on CPU unplug	2020-11-10 18:38:58 +01:00
cpu_pm.c	notifier: Fix broken error handling pattern	2020-09-01 09:58:03 +02:00
crash_core.c	kdump: append kernel build-id string to VMCOREINFO	2020-08-12 10:58:01 -07:00
crash_dump.c	crash_dump: Remove no longer used saved_max_pfn	2020-04-15 11:21:54 +02:00
cred.c	exec: Teach prepare_exec_creds how exec treats uids & gids	2020-05-20 14:44:21 -05:00
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c	sched: fix exit_mm vs membarrier (v4)	2020-10-29 11:00:30 +01:00
extable.c	kernel/extable.c: use address-of operator on section symbols	2020-04-07 10:43:42 -07:00
fail_function.c
fork.c	kernel/: fix repeated words in comments	2020-10-16 11:11:19 -07:00
freezer.c
futex.c	futex: Adjust absolute futex timeouts with per time namespace offset	2020-10-20 17:02:57 +02:00
gen_kheaders.sh	kbuild: add variables for compression tools	2020-06-06 23:42:01 +09:00
groups.c	LSM: Signal to SafeSetID when setting group IDs	2020-10-13 09:17:34 -07:00
hung_task.c	kernel/hung_task.c: introduce sysctl to print all traces when a hung task is detected	2020-06-08 11:05:56 -07:00
iomem.c
irq_work.c	irq_work, smp: Allow irq_work on call_single_queue	2020-05-28 10:54:15 +02:00
jump_label.c	kernel/: fix repeated words in comments	2020-10-16 11:11:19 -07:00
kallsyms.c	treewide: Convert macro and uses of __section(foo) to __section("foo")	2020-10-25 14:51:49 -07:00
kcmp.c	kernel/kcmp.c: Use new infrastructure to fix deadlocks in execve	2020-03-25 10:04:01 -05:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: make some symbols static	2020-08-12 10:58:02 -07:00
kexec.c	LSM: Introduce kernel_post_load_data() hook	2020-10-05 13:37:03 +02:00
kexec_core.c	kernel/: fix repeated words in comments	2020-10-16 11:11:19 -07:00
kexec_elf.c
kexec_file.c	kernel/resource: move and rename IORESOURCE_MEM_DRIVER_MANAGED	2020-10-16 11:11:18 -07:00
kexec_internal.h
kheaders.c
kmod.c	kmod: remove redundant "be an" in the comment	2020-08-12 10:58:01 -07:00
kprobes.c	Updates for tracing and bootconfig:	2020-10-15 15:51:28 -07:00
ksysfs.c
kthread.c	sched: membarrier: cover kthread_use_mm (v4)	2020-10-29 11:00:31 +01:00
latencytop.c	sysctl: pass kernel pointers to ->proc_handler	2020-04-27 02:07:40 -04:00
Makefile	Kbuild updates for v5.10	2020-10-22 13:13:57 -07:00
module-internal.h
module.c	Modules updates for v5.10	2020-10-22 13:08:57 -07:00
module_signature.c
module_signing.c
notifier.c	notifier: Fix broken error handling pattern	2020-09-01 09:58:03 +02:00
nsproxy.c	nsproxy: support CLONE_NEWTIME with setns()	2020-07-08 11:14:22 +02:00
padata.c	padata: fix possible padata_works_lock deadlock	2020-09-04 17:51:55 +10:00
panic.c	panic: dump registers on panic_on_warn	2020-10-16 11:11:22 -07:00
params.c	moduleparams: Add hexint type parameter	2020-07-28 13:44:53 +02:00
pid.c	pid: move pidfd_get_pid() to pid.c	2020-10-18 09:27:10 -07:00
pid_namespace.c	kernel/: fix repeated words in comments	2020-10-16 11:11:19 -07:00
profile.c
ptrace.c
range.c	kernel.h: split out min()/max() et al. helpers	2020-10-16 11:11:19 -07:00
reboot.c	arch: remove unicore32 port	2020-07-01 12:09:13 +03:00
regset.c	regset: kill ->get()	2020-07-27 14:31:12 -04:00
relay.c	kernel/relay.c: drop unneeded initialization	2020-10-16 11:11:22 -07:00
resource.c	kernel/resource: make iomem_resource implicit in release_mem_region_adjustable()	2020-10-16 11:11:18 -07:00
rseq.c
scftorture.c	scftorture: Add cond_resched() to test loop	2020-08-24 18:38:38 -07:00
scs.c	mm: memcontrol: account kernel stack per node	2020-08-07 11:33:25 -07:00
seccomp.c	seccomp: Make duplicate listener detection non-racy	2020-10-08 13:17:47 -07:00
signal.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
smp.c	Merge tag 'core-rcu-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2020-10-18 14:34:50 -07:00
smpboot.c
smpboot.h
softirq.c	softirq: Add debug check to __raise_softirq_irqoff()	2020-09-16 15:18:56 +02:00
stackleak.c	stackleak: let stack_erasing_sysctl take a kernel pointer buffer	2020-09-19 13:13:39 -07:00
stacktrace.c	stacktrace: Remove reliable argument from arch_stack_walk() callback	2020-09-18 14:24:16 +01:00
static_call.c	static_call: Fix return type of static_call_init	2020-10-02 21:18:25 +02:00
stop_machine.c	stop_machine: Add function and caller debug info	2020-11-10 18:38:57 +01:00
sys.c	kernel/sys.c: fix prototype of prctl_get_tid_address()	2020-10-25 11:44:16 -07:00
sys_ni.c	mm/madvise: introduce process_madvise() syscall: an external memory hinting API	2020-10-18 09:27:10 -07:00
sysctl-test.c
sysctl.c	mm: allow a controlled amount of unfairness in the page lock	2020-09-17 10:26:41 -07:00
task_work.c	task_work: cleanup notification modes	2020-10-17 15:05:30 -06:00
taskstats.c	taskstats: move specifying netlink policy back to ops	2020-10-02 19:11:12 -07:00
test_kprobes.c
torture.c	torture: Dump ftrace at shutdown only if requested	2020-06-29 12:01:45 -07:00
tracepoint.c	tracepoint: Fix out of sync data passing by static caller	2020-10-02 21:18:25 +02:00
tsacct.c
ucount.c	ucount: Make sure ucounts in /proc/sys/user don't regress again	2020-04-07 21:51:27 +02:00
uid16.c
uid16.h
umh.c	usermodehelper: reset umask to default before executing user process	2020-10-06 10:31:52 -07:00
up.c
user-return-notifier.c
user.c	user.c: make uidhash_table static	2020-06-04 19:06:24 -07:00
user_namespace.c	kernel/: fix repeated words in comments	2020-10-16 11:11:19 -07:00
usermode_driver.c	umd: Stop using split_argv	2020-07-07 11:58:59 -05:00
utsname.c	nsproxy: add struct nsset	2020-05-09 13:57:12 +02:00
utsname_sysctl.c	sysctl: pass kernel pointers to ->proc_handler	2020-04-27 02:07:40 -04:00
watch_queue.c	watch_queue: Limit the number of watches a user can hold	2020-08-17 09:39:18 -07:00
watchdog.c	kernel/watchdog.c: convert {soft/hard}lockup boot parameters to sysctl aliases	2020-06-08 11:05:56 -07:00
watchdog_hld.c
workqueue.c	workqueue: Manually break affinity on hotplug	2020-11-10 18:38:58 +01:00
workqueue_internal.h