Hi, I'm seeing the message below spammed continously in journald, even with 4.8-rc6. It's so bad that it throttles the CPU performance every few seconds. I found https://patchwork.kernel.org/patch/9247699/ which seems related. I am not subscribed to linux-wireless. First, here's some system info, then the stack trace at the bottom. $ lspci 00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller (rev 09) 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) 00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04) 00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04) 00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04) 00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04) 00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4) 00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 2 (rev c4) 00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04) 00:1f.0 ISA bridge: Intel Corporation HM76 Express Chipset LPC Controller (rev 04) 00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04) 00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04) 02:00.0 Network controller: Qualcomm Atheros AR9462 Wireless Network Adapter (rev 01) $ sudo lshw -class network [sudo] passord for folk: *-network description: Wireless interface product: AR9462 Wireless Network Adapter vendor: Qualcomm Atheros physical id: 0 bus info: pci@0000:02:00.0 logical name: wlan0 version: 01 serial: 24:ec:99:7f:0e:30 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless configuration: broadcast=yes driver=ath9k driverversion=4.8.0-040800rc6-generic firmware=N/A ip=192.168.1.176 latency=0 link=yes multicast=yes wireless=IEEE 802.11 resources: irq:17 memory:f0400000-f047ffff memory:f0480000-f048ffff $ uname -a Linux edbpc 4.8.0-040800rc6-generic #201609121119 SMP Mon Sep 12 15:21:03 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux rfkill list all 0: hci0: Bluetooth Soft blocked: no Hard blocked: no 1: phy0: Wireless LAN Soft blocked: no Hard blocked: no sep. 17 11:38:36 edbpc kernel: WARNING: CPU: 0 PID: 1684 at /home/kernel/COD/linux/drivers/net/wireless/ath/ath9k/beacon.c:642 ath9k_calculate_summary_state+0x135/0x390 [ath9k] sep. 17 11:38:36 edbpc kernel: Modules linked in: fuse ctr ccm binfmt_misc nls_utf8 nls_cp437 vfat fat intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic arc4 snd_hda_intel snd_hda_codec snd_hda_core ath9k snd_hwdep ath9k_common ath9k_hw snd_pcm ath kvm_intel snd_seq_midi uvcvideo snd_seq_midi_event mac80211 kvm videobuf2_vmalloc snd_rawmidi irqbypass videobuf2_memops snd_seq crct10dif_pclmul videobuf2_v4l2 crc32_pclmul videobuf2_core snd_seq_device videodev ghash_clmulni_intel cryptd intel_cstate cfg80211 media intel_rapl_perf snd_timer ath3k btusb btrtl btbcm btintel efi_pstore bluetooth snd joydev rfkill efivars lpc_ich serio_raw sg shpchp mei_me soundcore mfd_core mei evdev fujitsu_laptop battery ac tpm_tis tpm_tis_core tpm lp parport loop efivarfs sep. 17 11:38:36 edbpc kernel: ip_tables x_tables autofs4 ext4 crc16 jbd2 fscrypto mbcache hid_generic usbhid hid uas usb_storage sd_mod i915 ahci crc32c_intel libahci libata psmouse i2c_algo_bit scsi_mod drm_kms_helper xhci_pci syscopyarea ehci_pci xhci_hcd sysfillrect ehci_hcd sysimgblt fb_sys_fops usbcore drm usb_common fan thermal video fjes button sep. 17 11:38:36 edbpc kernel: CPU: 0 PID: 1684 Comm: kworker/u16:0 Tainted: G W 4.8.0-040800rc6-generic #201609121119 sep. 17 11:38:36 edbpc kernel: Hardware name: FUJITSU LIFEBOOK UH572/FJNBB31 , BIOS 2.15 07/29/2013 sep. 17 11:38:36 edbpc kernel: Workqueue: phy0 ieee80211_scan_work [mac80211] sep. 17 11:38:36 edbpc kernel: 0000000000000286 00000000189cb902 ffffffffab33fb84 0000000000000000 sep. 17 11:38:36 edbpc kernel: 0000000000000000 ffffffffab07f69e ffff96690ec45580 ffff96690ec46e10 sep. 17 11:38:36 edbpc kernel: ffff96690ec74018 ffff96690ec74018 ffff966912773360 ffff966912773360 sep. 17 11:38:36 edbpc kernel: Call Trace: sep. 17 11:38:36 edbpc kernel: [<ffffffffab33fb84>] ? dump_stack+0x5c/0x78 sep. 17 11:38:36 edbpc kernel: [<ffffffffab07f69e>] ? __warn+0xbe/0xe0 sep. 17 11:38:36 edbpc kernel: [<ffffffffc0b7a0b5>] ? ath9k_calculate_summary_state+0x135/0x390 [ath9k] sep. 17 11:38:36 edbpc kernel: [<ffffffffc0b7a332>] ? ath_complete_reset+0x22/0x130 [ath9k] sep. 17 11:38:36 edbpc kernel: [<ffffffffc0b7a55e>] ? ath_reset_internal+0x11e/0x1e0 [ath9k] sep. 17 11:38:36 edbpc kernel: [<ffffffffc0b7a656>] ? ath_reset+0x36/0x50 [ath9k] sep. 17 11:38:36 edbpc kernel: [<ffffffffc0b82e5a>] ? ath_chanctx_set_channel+0x13a/0x250 [ath9k] sep. 17 11:38:36 edbpc kernel: [<ffffffffc0b796c9>] ? ath9k_config+0xb9/0x1e0 [ath9k] sep. 17 11:38:36 edbpc kernel: [<ffffffffc09a9d05>] ? ieee80211_hw_config+0x85/0x3e0 [mac80211] sep. 17 11:38:36 edbpc kernel: [<ffffffffc09b52ed>] ? __ieee80211_scan_completed+0xfd/0x470 [mac80211] sep. 17 11:38:36 edbpc kernel: [<ffffffffc09b5eeb>] ? ieee80211_scan_work+0x7b/0x490 [mac80211] sep. 17 11:38:36 edbpc kernel: [<ffffffffab098ae4>] ? process_one_work+0x184/0x4b0 sep. 17 11:38:36 edbpc kernel: [<ffffffffab098e5d>] ? worker_thread+0x4d/0x480 sep. 17 11:38:36 edbpc kernel: [<ffffffffab6188b1>] ? __schedule+0x261/0x720 sep. 17 11:38:36 edbpc kernel: [<ffffffffab098e10>] ? process_one_work+0x4b0/0x4b0 sep. 17 11:38:36 edbpc kernel: [<ffffffffab09efbd>] ? kthread+0xcd/0xf0 sep. 17 11:38:36 edbpc kernel: [<ffffffffab02c751>] ? __switch_to+0x2c1/0x7a0 sep. 17 11:38:36 edbpc kernel: [<ffffffffab61d41f>] ? ret_from_fork+0x1f/0x40 sep. 17 11:38:36 edbpc kernel: [<ffffffffab09eef0>] ? kthread_create_on_node+0x1a0/0x1a0 sep. 17 11:38:36 edbpc kernel: ---[ end trace 4e47cb6784f0f49d ]--- -- Vidar
