kernel_optimize_test/kernel
Sebastian Andrzej Siewior 7a9b76bb9b smp: Process pending softirqs in flush_smp_call_function_from_idle()
[ Upstream commit 66040b2d5d41f85cb1a752a75260595344c5ec3b ]

send_call_function_single_ipi() may wake an idle CPU without sending an
IPI. The woken up CPU will process the SMP-functions in
flush_smp_call_function_from_idle(). Any raised softirq from within the
SMP-function call will not be processed.
Should the CPU have no tasks assigned, then it will go back to idle with
pending softirqs and the NOHZ will rightfully complain.

Process pending softirqs on return from flush_smp_call_function_queue().

Fixes: b2a02fc43a ("smp: Optimize send_call_function_single_ipi()")
Reported-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210123201027.3262800-2-bigeasy@linutronix.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:51 +01:00
..
bpf bpf: Clear subreg_def for global function return values 2021-03-04 11:37:34 +01:00
cgroup cgroup-v1: add disabled controller check in cgroup1_parse_param() 2021-02-17 11:02:25 +01:00
configs
debug kdb: Make memory allocations more robust 2021-03-04 11:37:18 +01:00
dma swiotlb: remove the tbl_dma_addr argument to swiotlb_tbl_map_single 2020-11-02 10:10:39 -05:00
entry entry: Fix the incorrect ordering of lockdep and RCU check 2020-11-04 18:06:14 +01:00
events exec: Transform exec_update_mutex into a rw_semaphore 2021-01-09 13:46:24 +01:00
gcov
irq genirq/msi: Activate Multi-MSI early when MSI_FLAG_ACTIVATE_EARLY is set 2021-02-10 09:29:17 +01:00
kcsan kcsan: Rewrite kcsan_prandom_u32_max() without prandom_u32_state() 2021-03-04 11:37:37 +01:00
livepatch kernel/: fix repeated words in comments 2020-10-16 11:11:19 -07:00
locking locking/lockdep: Avoid unmatched unlock 2021-03-04 11:37:47 +01:00
power PM: hibernate: flush swap writer after marking 2021-02-03 23:28:40 +01:00
printk printk: fix string termination for record_print_text() 2021-01-30 13:55:20 +01:00
rcu rcu-tasks: Move RCU-tasks initialization to before early_initcall() 2021-01-19 18:27:28 +01:00
sched sched/eas: Don't update misfit status if the task is pinned 2021-03-04 11:37:44 +01:00
time tick/sched: Remove bogus boot "safety" check 2021-01-06 14:56:55 +01:00
trace bpf: Unbreak BPF_PROG_TYPE_KPROBE when kprobe is called via do_int3 2021-02-17 11:02:25 +01:00
.gitignore
acct.c kernel: acct.c: fix some kernel-doc nits 2020-10-16 11:11:19 -07:00
async.c
audit_fsnotify.c fsnotify: generalize handle_inode_event() 2020-12-30 11:54:18 +01:00
audit_tree.c fsnotify: generalize handle_inode_event() 2020-12-30 11:54:18 +01:00
audit_watch.c fsnotify: generalize handle_inode_event() 2020-12-30 11:54:18 +01:00
audit.c
audit.h
auditfilter.c
auditsc.c
backtracetest.c
bounds.c
capability.c
compat.c
configs.c
context_tracking.c
cpu_pm.c
cpu.c kernel/cpu: add arch override for clear_tasks_mm_cpumask() mm handling 2020-11-27 00:10:39 +11:00
crash_core.c
crash_dump.c
cred.c
delayacct.c
dma.c
exec_domain.c
exit.c kernel/io_uring: cancel io_uring before task works 2021-01-30 13:55:18 +01:00
extable.c
fail_function.c fail_function: Remove a redundant mutex unlock 2020-11-19 11:58:16 -08:00
fork.c exec: Transform exec_update_mutex into a rw_semaphore 2021-01-09 13:46:24 +01:00
freezer.c
futex.c futex: Handle faults correctly for PI futexes 2021-01-30 13:55:17 +01:00
gen_kheaders.sh
groups.c
hung_task.c kernel/hung_task.c: make type annotations consistent 2020-11-02 12:14:19 -08:00
iomem.c
irq_work.c
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 exec: Transform exec_update_mutex into a rw_semaphore 2021-01-09 13:46:24 +01:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c
kexec_core.c kernel: kexec: remove the lock operation of system_transition_mutex 2021-02-03 23:28:37 +01:00
kexec_elf.c
kexec_file.c ima: Free IMA measurement buffer after kexec syscall 2021-03-04 11:37:50 +01:00
kexec_internal.h
kexec.c
kheaders.c
kmod.c
kprobes.c kretprobe: Avoid re-registration of the same kretprobe earlier 2021-02-10 09:29:16 +01:00
ksysfs.c
kthread.c kthread: Extract KTHREAD_IS_PER_CPU 2021-02-07 15:37:17 +01:00
latencytop.c
Makefile elfcore: fix building with clang 2020-12-11 14:02:14 -08:00
module_signature.c
module_signing.c
module-internal.h
module.c module: delay kobject uevent until after module init call 2021-01-06 14:56:54 +01:00
notifier.c
nsproxy.c
padata.c
panic.c panic: don't dump stack twice on warn 2020-11-14 11:26:04 -08:00
params.c params: Replace zero-length array with flexible-array member 2020-10-29 17:22:59 -05:00
pid_namespace.c kernel/: fix repeated words in comments 2020-10-16 11:11:19 -07:00
pid.c exec: Transform exec_update_mutex into a rw_semaphore 2021-01-09 13:46:24 +01:00
profile.c
ptrace.c ptrace: Set PF_SUPERPRIV when checking capability 2020-11-17 12:53:22 -08:00
range.c kernel.h: split out min()/max() et al. helpers 2020-10-16 11:11:19 -07:00
reboot.c reboot: fix overflow parsing reboot cpu number 2020-11-14 11:26:03 -08:00
regset.c
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
scs.c
seccomp.c seccomp: Set PF_SUPERPRIV when checking capability 2020-11-17 12:53:22 -08:00
signal.c ptrace: fix task_join_group_stop() for the case when current is traced 2020-11-02 12:14:19 -08:00
smp.c smp: Process pending softirqs in flush_smp_call_function_from_idle() 2021-03-04 11:37:51 +01:00
smpboot.c kthread: Extract KTHREAD_IS_PER_CPU 2021-02-07 15:37:17 +01:00
smpboot.h
softirq.c
stackleak.c
stacktrace.c
static_call.c
stop_machine.c stop_machine, rcu: Mark functions as notrace 2020-10-26 12:12:27 +01:00
sys_ni.c mm/madvise: introduce process_madvise() syscall: an external memory hinting API 2020-10-18 09:27:10 -07:00
sys.c kernel/sys.c: fix prototype of prctl_get_tid_address() 2020-10-25 11:44:16 -07:00
sysctl-test.c
sysctl.c
task_work.c task_work: cleanup notification modes 2020-10-17 15:05:30 -06:00
taskstats.c
test_kprobes.c
torture.c
tracepoint.c tracepoint: Replace zero-length array with flexible-array member 2020-10-29 17:22:59 -05:00
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c
up.c
user_namespace.c kernel/: fix repeated words in comments 2020-10-16 11:11:19 -07:00
user-return-notifier.c
user.c
usermode_driver.c
utsname_sysctl.c
utsname.c
watch_queue.c
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 workqueue: Restrict affinity change to rescuer 2021-02-07 15:37:17 +01:00