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Peter Zijlstra b5c4477366 sched: Use cpu_dying() to fix balance_push vs hotplug-rollback 
Use the new cpu_dying() state to simplify and fix the balance_push()
vs CPU hotplug rollback state.

Specifically, we currently rely on notifiers sched_cpu_dying() /
sched_cpu_activate() to terminate balance_push, however if the
cpu_down() fails when we're past sched_cpu_deactivate(), it should
terminate balance_push at that point and not wait until we hit
sched_cpu_activate().

Similarly, when cpu_up() fails and we're going back down, balance_push
should be active, where it currently is not.

So instead, make sure balance_push is enabled below SCHED_AP_ACTIVE
(when !cpu_active()), and gate it's utility with cpu_dying().

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Link: https://lkml.kernel.org/r/YHgAYef83VQhKdC2@hirez.programming.kicks-ass.net
2021-04-16 17:06:32 +02:00
..
bpf
idmapped-mounts-v5.12
2021-02-23 13:39:45 -08:00
cgroup
idmapped-mounts-v5.12
2021-02-23 13:39:45 -08:00
configs
staging: ION: remove some references to CONFIG_ION
2021-01-06 17:39:38 +01:00
debug
kgdb: fix to kill breakpoints on initmem after boot
2021-02-26 09:41:05 -08:00
dma
Merge branch 'stable/for-linus-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb
2021-02-26 13:59:32 -08:00
entry
entry: Explicitly flush pending rcuog wakeup before last rescheduling point
2021-02-17 14:12:43 +01:00
events
kernel: delete repeated words in comments
2021-02-26 09:41:03 -08:00
gcov
init/gcov: allow CONFIG_CONSTRUCTORS on UML to fix module gcov
2021-02-05 11:03:47 -08:00
irq
Driver core / debugfs update for 5.12-rc1
2021-02-24 10:13:55 -08:00
kcsan
kcsan: Rewrite kcsan_prandom_u32_max() without prandom_u32_state()
2021-01-04 14:39:07 -08:00
livepatch
kallsyms: refactor {,module_}kallsyms_on_each_symbol
2021-02-08 12:22:08 +01:00
locking
kernel: delete repeated words in comments
2021-02-26 09:41:03 -08:00
power
Merge branches 'powercap' and 'pm-misc'
2021-02-15 18:50:01 +01:00
printk
Merge branch 'printk-rework' into for-linus
2021-02-22 13:43:55 +01:00
rcu
Scheduler updates for v5.12:
2021-02-21 12:35:04 -08:00
sched
sched: Use cpu_dying() to fix balance_push vs hotplug-rollback
2021-04-16 17:06:32 +02:00
time
These are the latest RCU updates for v5.12:
2021-02-21 12:04:41 -08:00
trace
tracing: Skip selftests if tracing is disabled
2021-03-04 09:51:25 -05:00
.gitignore
…
acct.c
kernel/acct.c: use #elif instead of #end and #elif
2020-12-15 22:46:15 -08:00
async.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
audit_fsnotify.c
audit_alloc_mark(): don't open-code ERR_CAST()
2021-02-23 10:25:27 -05:00
audit_tree.c
fsnotify: generalize handle_inode_event()
2020-12-03 14:58:35 +01:00
audit_watch.c
fsnotify: generalize handle_inode_event()
2020-12-03 14:58:35 +01:00
audit.c
audit: Remove leftover reference to the audit_tasklet
2021-01-15 11:58:10 -05:00
audit.h
audit: change unnecessary globals into statics
2020-08-17 20:26:58 -04:00
auditfilter.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
auditsc.c
idmapped-mounts-v5.12
2021-02-23 13:39:45 -08:00
backtracetest.c
treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD()
2020-07-30 11:15:58 -07:00
bounds.c
…
capability.c
capability: handle idmapped mounts
2021-01-24 14:27:16 +01:00
compat.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
configs.c
…
context_tracking.c
…
cpu_pm.c
notifier: Fix broken error handling pattern
2020-09-01 09:58:03 +02:00
cpu.c
cpumask: Introduce DYING mask
2021-04-16 17:06:32 +02:00
crash_core.c
kdump: append uts_namespace.name offset to VMCOREINFO
2020-12-15 22:46:18 -08:00
crash_dump.c
…
cred.c
…
delayacct.c
…
dma.c
…
exec_domain.c
…
exit.c
signal: Allow tasks to cache one sigqueue struct
2021-04-14 18:04:08 +02:00
extable.c
…
fail_function.c
fault-injection: handle EI_ETYPE_TRUE
2020-12-15 22:46:19 -08:00
fork.c
signal: Allow tasks to cache one sigqueue struct
2021-04-14 18:04:08 +02:00
freezer.c
…
futex.c
Merge branch 'linus' into locking/core, to pick up upstream fixes
2021-02-12 12:54:58 +01:00
gen_kheaders.sh
…
groups.c
groups: simplify struct group_info allocation
2021-02-26 09:41:03 -08:00
hung_task.c
kernel/hung_task.c: make type annotations consistent
2020-11-02 12:14:19 -08:00
iomem.c
…
irq_work.c
irq_work: Optimize irq_work_single()
2020-11-24 16:47:49 +01:00
jump_label.c
jump_label: Fix usage in module __init
2020-12-18 16:53:12 +01:00
kallsyms.c
kallsyms: only build {,module_}kallsyms_on_each_symbol when required
2021-02-08 12:24:04 +01:00
kcmp.c
Merge branch 'exec-update-lock-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2020-12-15 19:36:48 -08:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
preempt: Introduce CONFIG_PREEMPT_DYNAMIC
2021-02-17 14:12:24 +01:00
kcov.c
kernel: make kcov_common_handle consider the current context
2020-11-02 18:00:20 -08:00
kexec_core.c
Merge branch 'work.elf-compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2021-02-21 09:29:23 -08:00
kexec_elf.c
…
kexec_file.c
ima: Free IMA measurement buffer after kexec syscall
2021-02-10 15:49:38 -05:00
kexec_internal.h
kexec: move machine_kexec_post_load() to public interface
2021-02-22 12:33:26 +00:00
kexec.c
LSM: Introduce kernel_post_load_data() hook
2020-10-05 13:37:03 +02:00
kheaders.c
…
kmod.c
kmod: remove redundant "be an" in the comment
2020-08-12 10:58:01 -07:00
kprobes.c
kprobes: Fix to delay the kprobes jump optimization
2021-02-19 14:57:12 -05:00
ksysfs.c
…
kthread.c
- Correct the marking of kthreads which are supposed to run on a specific,
2021-01-24 10:09:20 -08:00
latencytop.c
…
Makefile
kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE
2021-02-16 09:59:41 +01:00
module_signature.c
module: harden ELF info handling
2021-01-19 10:24:45 +01:00
module_signing.c
module: harden ELF info handling
2021-01-19 10:24:45 +01:00
module-internal.h
…
module.c
module: potential uninitialized return in module_kallsyms_on_each_symbol()
2021-02-10 16:57:04 +01:00
notifier.c
notifier: Fix broken error handling pattern
2020-09-01 09:58:03 +02:00
nsproxy.c
fixes-v5.11
2020-12-14 16:40:27 -08:00
padata.c
padata: fix possible padata_works_lock deadlock
2020-09-04 17:51:55 +10:00
panic.c
panic: don't dump stack twice on warn
2020-11-14 11:26:04 -08:00
params.c
Modules updates for v5.11
2020-12-17 13:01:31 -08:00
pid_namespace.c
fixes-v5.11
2020-12-14 16:40:27 -08:00
pid.c
Merge branch 'exec-update-lock-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2020-12-15 19:36:48 -08:00
profile.c
…
ptrace.c
rseq, ptrace: Add PTRACE_GET_RSEQ_CONFIGURATION request
2021-03-17 16:15:39 +01:00
range.c
kernel.h: split out min()/max() et al. helpers
2020-10-16 11:11:19 -07:00
reboot.c
reboot: hide from sysfs not applicable settings
2020-12-15 22:46:19 -08:00
regset.c
regset: kill ->get()
2020-07-27 14:31:12 -04:00
relay.c
relay: allow the use of const callback structs
2020-12-15 22:46:18 -08:00
resource_kunit.c
resource: provide meaningful MODULE_LICENSE() in test suite
2020-11-25 18:52:35 +01:00
resource.c
resource: Move devmem revoke code to resource framework
2021-01-12 14:26:31 +01:00
rseq.c
rseq: Optimise rseq_get_rseq_cs() and clear_rseq_cs()
2021-04-14 18:04:09 +02:00
scftorture.c
scftorture: Add debug output for wrong-CPU warning
2021-01-04 13:53:41 -08:00
scs.c
scs: switch to vmapped shadow stacks
2020-12-01 10:30:28 +00:00
seccomp.c
seccomp: Improve performace by optimizing rmb()
2021-02-10 12:40:11 -08:00
signal.c
signal: Allow tasks to cache one sigqueue struct
2021-04-14 18:04:08 +02:00
smp.c
smp: Process pending softirqs in flush_smp_call_function_from_idle()
2021-02-17 14:12:42 +01:00
smpboot.c
kthread: Extract KTHREAD_IS_PER_CPU
2021-01-22 15:09:42 +01:00
smpboot.h
…
softirq.c
softirq: Move do_softirq_own_stack() to generic asm header
2021-02-10 23:34:16 +01:00
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: Allow module use without exposing static_call_key
2021-02-17 14:12:42 +01:00
stop_machine.c
stop_machine: Add caller debug info to queue_stop_cpus_work
2021-03-23 16:01:58 +01:00
sys_ni.c
epoll: wire up syscall epoll_pwait2
2020-12-19 11:18:38 -08:00
sys.c
Kbuild updates for v5.12
2021-02-25 10:17:31 -08:00
sysctl-test.c
…
sysctl.c
sysctl.c: fix underflow value setting risk in vm_table
2021-02-26 09:41:03 -08:00
task_work.c
task_work: remove legacy TWA_SIGNAL path
2020-12-12 09:17:38 -07:00
taskstats.c
treewide: rename nla_strlcpy to nla_strscpy.
2020-11-16 08:08:54 -08:00
test_kprobes.c
…
torture.c
torture: Maintain torture-specific set of CPUs-online books
2021-01-06 17:17:22 -08:00
tracepoint.c
tracepoints: Code clean up
2021-02-09 12:27:29 -05:00
tsacct.c
…
ucount.c
…
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_namespace.c
fixes-v5.11
2020-12-14 16:40:27 -08:00
user-return-notifier.c
…
user.c
user: Use generic ns_common::count
2020-08-19 14:14:12 +02:00
usermode_driver.c
…
utsname_sysctl.c
…
utsname.c
uts: Use generic ns_common::count
2020-08-19 14:13:20 +02:00
watch_queue.c
watch_queue: rectify kernel-doc for init_watch()
2021-01-26 11:16:34 +00:00
watchdog_hld.c
…
watchdog.c
kernel/watchdog: fix watchdog_allowed_mask not used warning
2020-11-14 11:26:03 -08:00
workqueue_internal.h
…
workqueue.c
Merge branch 'for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
2021-02-22 17:06:54 -08:00