Some x86-based systems with
CONFIG_NO_HZ_FULL=y
run into this WARN_ON_ONCE during boot
static bool can_stop_full_tick(void)
{
WARN_ON_ONCE(!irqs_disabled());
Thanks,
Carsten.
[ 22.706429] WARNING: CPU: 2 PID: 33 at kernel/time/tick-sched.c:167
can_stop_full_tick+0x2d/0xcd()
[ 22.706700] Modules linked in: ppdev parport_pc parport cpufreq_stats
eeprom lockd 8021q garp w83627ehf stp grace llc hwmon_vid coretemp
ip6table_filter ip6_tables snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec
snd_hwdep microcode snd_seq iTCO_wdt iTCO_vendor_support snd_seq_device
snd_pcm serio_raw pcspkr snd_timer snd r8169 lpc_ich soundcore mfd_core
mii i2c_i801 acpi_cpufreq uinput sunrpc ipv6 i915 drm_kms_helper drm
video i2c_algo_bit i2c_core
[ 22.708082] CPU: 2 PID: 33 Comm: ksoftirqd/2 Not tainted 3.18.7-rt2 #7
[ 22.708083] Hardware name: System manufacturer System Product
Name/P8H67-I DELUXE, BIOS 0502 02/11/2011
[ 22.708085] 00000000000000a7 ffff8802353b7c78 ffffffff814f36db
0000000000000001
[ 22.708086] 0000000000000000 ffff8802353b7cb8 ffffffff8103b011
ffff8802353b7cb8
[ 22.708087] ffffffff81098771 ffff880236e0d0f0 ffff880236e00000
000000000000000a
[ 22.708087] Call Trace:
[ 22.708091] [<ffffffff814f36db>] dump_stack+0x4f/0x7c
[ 22.708092] [<ffffffff8103b011>] warn_slowpath_common+0x81/0x9c
[ 22.708094] [<ffffffff81098771>] ? can_stop_full_tick+0x2d/0xcd
[ 22.708095] [<ffffffff8103b046>] warn_slowpath_null+0x1a/0x1c
[ 22.708096] [<ffffffff81098771>] can_stop_full_tick+0x2d/0xcd
[ 22.708098] [<ffffffff81098f2e>] __tick_nohz_full_check+0x52/0x93
[ 22.708099] [<ffffffff81098f8d>] nohz_full_kick_work_func+0xe/0x10
[ 22.708101] [<ffffffff810ded0c>] irq_work_run_list+0x36/0x57
[ 22.708102] [<ffffffff810df034>] irq_work_tick+0x42/0x66
[ 22.708103] [<ffffffff8108b142>] run_timer_softirq+0x35/0x223
[ 22.708106] [<ffffffff812779af>] ? check_preemption_disabled+0x9b/0x132
[ 22.708108] [<ffffffff810609a3>] ?
vtime_common_account_irq_enter+0x5b/0x60
[ 22.708110] [<ffffffff8103e41f>] do_current_softirqs+0x18b/0x2d5
[ 22.708111] [<ffffffff8103e592>] run_ksoftirqd+0x29/0x3d
[ 22.708113] [<ffffffff810561d4>] smpboot_thread_fn+0x201/0x206
[ 22.708114] [<ffffffff81055fd3>] ?
smpboot_unregister_percpu_thread+0x67/0x67
[ 22.708116] [<ffffffff81053169>] kthread+0xc4/0xcc
[ 22.708118] [<ffffffff810530a5>] ? __init_kthread_worker+0x50/0x50
[ 22.708120] [<ffffffff814f7bec>] ret_from_fork+0x7c/0xb0
[ 22.708121] [<ffffffff810530a5>] ? __init_kthread_worker+0x50/0x50
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