Switched APIC routing to physical x2apic. ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1 smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.30GHz (family: 0x6, model: 0x3f, stepping: 0x0) Performance Events: unsupported p6 CPU model 63 no PMU driver, software events only. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at ./include/linux/cpumask.h:121 cpumask_check.part.0+0x1c/0x20 include/linux/cpumask.h:121 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.9.190 #174 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff88012b077860 ffffffff82b5c2fe ffffffff87c26e00 fffffbfff0d98fa4 0000000000000000 ffffffff85c8fb80 00000000ffffffff 0000000000000000 0000000000000009 ffff88012b077920 ffffffff81672464 0000000041b58ab3 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0x138/0x19a lib/dump_stack.c:51 [] panic+0x1f2/0x421 kernel/panic.c:180 [] __warn.cold+0x2f/0x2f kernel/panic.c:546 [] warn_slowpath_null+0x2d/0x40 kernel/panic.c:589 [] cpumask_check.part.0+0x1c/0x20 include/linux/cpumask.h:121 [] cpumask_check include/linux/cpumask.h:121 [inline] [] cpumask_test_cpu include/linux/cpumask.h:317 [inline] [] select_task_rq kernel/sched/core.c:1618 [inline] [] try_to_wake_up+0x9c3/0xd30 kernel/sched/core.c:2089 [] wake_up_process+0x10/0x20 kernel/sched/core.c:2166 [] create_worker+0x3a3/0x530 kernel/workqueue.c:1795 [] get_unbound_pool kernel/workqueue.c:3362 [inline] [] alloc_unbound_pwq+0x748/0xbc0 kernel/workqueue.c:3509 [] apply_wqattrs_prepare+0x499/0x970 kernel/workqueue.c:3658 [] apply_workqueue_attrs_locked+0xa7/0x140 kernel/workqueue.c:3735 [] apply_workqueue_attrs+0x31/0x50 kernel/workqueue.c:3768 [] alloc_and_link_pwqs kernel/workqueue.c:3890 [inline] [] __alloc_workqueue_key+0x564/0xe80 kernel/workqueue.c:3965 [] init_workqueues+0x9b0/0xb47 kernel/workqueue.c:5573 [] do_one_initcall+0xa0/0x220 init/main.c:780 [] do_pre_smp_initcalls init/main.c:880 [inline] [] kernel_init_freeable+0x2ee/0x532 init/main.c:1010 [] kernel_init+0x12/0x15e init/main.c:946 [] ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:375 Rebooting in 86400 seconds..