WARNING: at kernel/events/core.c:2122

Severity

Info

Found by

First Seen

Seen on

Linux-kernel report

Fixed by

Kernel Spew

1. [   44.688044] ------------[ cut here ]------------
   [   44.692023] WARNING: at kernel/events/core.c:2122 task_ctx_sched_out+0x3c/0x5f()
   [   44.692023] Modules linked in: nfsd auth_rpcgss oid_registry nfs_acl nfs lockd dns_resolver fscache sunrpc loop fuse snd_hda_codec_hdmi snd_hda_codec_realtek coretemp kvm_intel kvm nouveau mxm_wmi evdev ttm microcode drm_kms_helper drm i2c_algo_bit video wmi snd_hda_intel acpi_cpufreq snd_hda_codec mperf snd_hwdep snd_pcm snd_page_alloc snd_seq snd_seq_device snd_timer shpchp snd soundcore button psmouse pcspkr processor i2c_nforce2 thermal_sys serio_raw i2c_core ext4 crc16 jbd2 mbcache sg sd_mod crc_t10dif ata_generic ahci libahci ohci_hcd libata ehci_pci ehci_hcd r8169 mii scsi_mod usbcore usb_common
   [   44.692023] CPU: 0 PID: 2992 Comm: out Not tainted 3.10.0-rc5 #2
   [   44.692023] Hardware name: AOpen   DE7000/nMCP7ALPx-DE R1.06 Oct.19.2012, BIOS 080015  10/19/2012
   [   44.692023]  0000000000000000 ffffffff8102e215 0000000000000000 ffff88011fc15b28
   [   44.692023]  ffff8801165a10c0 0000000000000000 ffff88011977458c ffffffff810ab2e1
   [   44.692023]  ffff880119774580 ffffffff810af04e 0000000000000009 ffff8801165a10c0
   [   44.692023] Call Trace:
   [   44.692023]  [] ? warn_slowpath_common+0x5b/0x70
   [   44.692023]  [] ? task_ctx_sched_out+0x3c/0x5f
   [   44.692023]  [] ? perf_event_exit_task+0xbf/0x194
   [   44.692023]  [] ? do_exit+0x3e7/0x90c
   [   44.692023]  [] ? __do_fault+0x359/0x394
   [   44.692023]  [] ? do_group_exit+0x66/0x98
   [   44.692023]  [] ? get_signal_to_deliver+0x479/0x4ad
   [   44.692023]  [] ? __pte_alloc+0x83/0xf2
   [   44.692023]  [] ? do_signal+0x3c/0x432
   [   44.692023]  [] ? __do_page_fault+0x31c/0x3ba
   [   44.692023]  [] ? do_notify_resume+0x20/0x5d
   [   44.692023]  [] ? retint_signal+0x3d/0x78
   [   44.692023] ---[ end trace 38bad7d3252e7847 ]---
   

2. Related, triggered by same reproducible code by Peter Zijlstra

   [  324.983534] ------------[ cut here ]------------
   [  324.984420] WARNING: at kernel/events/core.c:1953 __perf_event_enable+0x187/0x190()
   [  324.984420] Modules linked in:
   [  324.984420] CPU: 19 PID: 2715 Comm: nmi_bug_snb Not tainted 3.10.0+ #246
   [  324.984420] Hardware name: Supermicro X8DTN/X8DTN, BIOS 4.6.3 01/08/2010
   [  324.984420]  0000000000000009 ffff88043fce3ec8 ffffffff8160ea0b ffff88043fce3f00
   [  324.984420]  ffffffff81080ff0 ffff8802314fdc00 ffff880231a8f800 ffff88043fcf7860
   [  324.984420]  0000000000000286 ffff880231a8f800 ffff88043fce3f10 ffffffff8108103a
   [  324.984420] Call Trace:
   [  324.984420]    [] dump_stack+0x19/0x1b
   [  324.984420]  [] warn_slowpath_common+0x70/0xa0
   [  324.984420]  [] warn_slowpath_null+0x1a/0x20
   [  324.984420]  [] __perf_event_enable+0x187/0x190
   [  324.984420]  [] remote_function+0x40/0x50
   [  324.984420]  [] generic_smp_call_function_single_interrupt+0xbe/0x130
   [  324.984420]  [] smp_call_function_single_interrupt+0x27/0x40
   [  324.984420]  [] call_function_single_interrupt+0x6f/0x80
   [  324.984420]    [] ? _raw_spin_unlock_irqrestore+0x41/0x70
   [  324.984420]  [] perf_event_exit_task+0x14d/0x210
   [  324.984420]  [] ? switch_task_namespaces+0x24/0x60
   [  324.984420]  [] do_exit+0x2b6/0xa40
   [  324.984420]  [] ? _raw_spin_unlock_irq+0x2c/0x30
   [  324.984420]  [] do_group_exit+0x49/0xc0
   [  324.984420]  [] get_signal_to_deliver+0x254/0x620
   [  324.984420]  [] do_signal+0x57/0x5a0
   [  324.984420]  [] ? __do_page_fault+0x2a4/0x4e0
   [  324.984420]  [] ? retint_restore_args+0xe/0xe
   [  324.984420]  [] ? retint_signal+0x11/0x84
   [  324.984420]  [] do_notify_resume+0x65/0x80
   [  324.984420]  [] retint_signal+0x46/0x84
   [  324.984420] ---[ end trace 442ec2f04db3771a ]---