Return-path: Received: from cantor2.suse.de ([195.135.220.15]:52615 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751878Ab1LAKzn (ORCPT ); Thu, 1 Dec 2011 05:55:43 -0500 Date: Thu, 1 Dec 2011 11:55:38 +0100 From: Michal Hocko To: Stanislaw Gruszka Cc: LKML , "John W. Linville" , linux-wireless@vger.kernel.org, Yong Zhang Subject: Re: [3.2-rc3] 100% CPU usage while in del_timer_sync from iwl3945_rs_free_sta Message-ID: <20111201105538.GA4504@tiehlicka.suse.cz> (sfid-20111201_115603_606173_62509D37) References: <20111129100727.GD2675@tiehlicka.suse.cz> <20111129113906.GA7299@redhat.com> <20111130101028.GA2906@tiehlicka.suse.cz> <20111130142316.GA2466@redhat.com> <20111130140316.GA4153@tiehlicka.suse.cz> <20111130153929.GA2144@redhat.com> <20111201085845.GA4602@tiehlicka.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20111201085845.GA4602@tiehlicka.suse.cz> Sender: linux-wireless-owner@vger.kernel.org List-ID: On Thu 01-12-11 09:58:45, Michal Hocko wrote: [...] > I will try to turn on timer debugging suggested by Yong Zhang in other > email. OK, so applied the following commits: $ git shortlog master.. Christine Chan (2): timer: Use debugobjects to catch deletion of uninitialized timers debugobjects: Extend to assert that an object is initialized Michal Hocko (1): Debugging patch Stephen Boyd (2): timer: Setup uninitialized timer with a stub callback debugobjects: Be smarter about static objects Debugging patch is the one from Stanislaw posted earlier in the thread. It prevents del_timer_sync and warns on NULL timer in iwl3945_rs_free_sta. Also turned on the suggested DEBUG_OBJECTS_TIMERS. I do not see any timer related warnings. I will try it with the slightly modified Debugging patch and just warn without returning before calling del_timer_sync. [...] [ 305.800081] iwl3945_rs_alloc_sta rs_sta f4be1ac0 [ 305.800091] ieee80211 phy0: Allocated STA 00:0b:6b:3c:8c:e4 [ 305.800098] ieee80211 phy0: Inserted dummy STA 00:0b:6b:3c:8c:e4 [ 305.800112] ieee80211 phy0: device no longer idle - working [ 305.800120] wlan0: associate with 00:0b:6b:3c:8c:e4 (try 1) [ 305.807868] wlan0: RX ReassocResp from 00:0b:6b:3c:8c:e4 (capab=0x431 status=0 aid=1) [ 305.807878] wlan0: associated [ 305.808067] ieee80211 phy0: Inserted STA 00:0b:6b:3c:8c:e4 [ 305.808081] ieee80211 phy0: WMM queue=2 aci=0 acm=0 aifs=2 cWmin=7 cWmax=1023 txop=64 uapsd=0 [ 305.808095] ieee80211 phy0: WMM queue=3 aci=1 acm=0 aifs=7 cWmin=15 cWmax=1023 txop=0 uapsd=0 [ 305.808108] ieee80211 phy0: WMM queue=1 aci=2 acm=0 aifs=2 cWmin=7 cWmax=15 txop=94 uapsd=0 [ 305.808121] ieee80211 phy0: WMM queue=0 aci=3 acm=0 aifs=2 cWmin=3 cWmax=7 txop=47 uapsd=0 [ 316.368064] wlan0: no IPv6 routers present [ 339.387891] PM: Syncing filesystems ... done. [ 339.480244] PM: Preparing system for mem sleep [ 340.735244] Freezing user space processes ... (elapsed 0.01 seconds) done. [ 340.752248] Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done. [ 340.772279] PM: Entering mem sleep [ 340.909961] sd 0:0:0:0: [sda] Synchronizing SCSI cache [ 340.915156] sd 0:0:0:0: [sda] Stopping disk [ 340.959367] serial 00:0a: disabled [ 340.963655] serial 00:0a: wake-up capability disabled by ACPI [ 340.968461] PIIX_IDE 0000:00:1f.1: PCI INT A disabled [ 340.970913] ehci_hcd 0000:00:1d.7: PCI INT A disabled [ 340.972114] uhci_hcd 0000:00:1d.3: PCI INT D disabled [ 340.972127] uhci_hcd 0000:00:1d.2: PCI INT C disabled [ 340.972140] uhci_hcd 0000:00:1d.1: PCI INT B disabled [ 340.972152] uhci_hcd 0000:00:1d.0: PCI INT A disabled [ 340.982942] i915 0000:00:02.0: PCI INT A disabled [ 341.276198] snd_hda_intel 0000:00:1b.0: PCI INT A disabled [ 341.376137] snd_hda_intel 0000:00:1b.0: power state changed by ACPI to D3 [ 342.922781] ata_piix 0000:00:1f.2: PCI INT B disabled [ 343.024183] PM: suspend of devices complete after 2247.084 msecs [ 343.128551] sky2 0000:02:00.0: PME# enabled [ 343.218047] sky2 0000:02:00.0: wake-up capability enabled by ACPI [ 343.464325] ehci_hcd 0000:00:1d.7: PME# enabled [ 343.554551] ehci_hcd 0000:00:1d.7: wake-up capability enabled by ACPI [ 343.660211] uhci_hcd 0000:00:1d.3: wake-up capability enabled by ACPI [ 343.748740] uhci_hcd 0000:00:1d.2: wake-up capability enabled by ACPI [ 343.837261] uhci_hcd 0000:00:1d.1: wake-up capability enabled by ACPI [ 343.925774] uhci_hcd 0000:00:1d.0: wake-up capability enabled by ACPI [ 344.012708] PM: late suspend of devices complete after 900.012 msecs [ 344.099624] ACPI: Preparing to enter system sleep state S3 [ 344.186393] PM: Saving platform NVS memory [ 344.272082] Disabling non-boot CPUs ... [ 344.460060] CPU 1 is now offline [ 344.543874] ACPI: Low-level resume complete [ 344.543874] PM: Restoring platform NVS memory [ 344.543874] Enabling non-boot CPUs ... [ 344.554434] Booting Node 0 Processor 1 APIC 0x1 [ 344.558267] smpboot cpu 1: start_ip = 9b000 [ 344.358012] Initializing CPU#1 [ 344.358012] Calibrating delay loop (skipped) already calibrated this CPU [ 344.580289] CPU1 is up [ 344.593922] ACPI: Waking up from system sleep state S3 [ 344.598517] i915 0000:00:02.0: restoring config space at offset 0xf (was 0x100, writing 0x10b) [ 344.600866] pci 0000:00:02.1: restoring config space at offset 0x1 (was 0x900000, writing 0x900007) [ 344.603204] snd_hda_intel 0000:00:1b.0: restoring config space at offset 0x3 (was 0x0, writing 0x10) [ 344.606598] snd_hda_intel 0000:00:1b.0: restoring config space at offset 0x1 (was 0x100006, writing 0x100002) [ 344.609076] pci 0000:00:1c.0: restoring config space at offset 0xf (was 0x40100, writing 0x4010b) [ 344.611429] pci 0000:00:1c.0: restoring config space at offset 0x9 (was 0x10001, writing 0x80c180a1) [ 344.613759] pci 0000:00:1c.0: restoring config space at offset 0x8 (was 0x0, writing 0xf000f000) [ 344.616070] pci 0000:00:1c.0: restoring config space at offset 0x7 (was 0x20000000, writing 0x20002020) [ 344.618358] pci 0000:00:1c.0: restoring config space at offset 0x6 (was 0x0, writing 0x20200) [ 344.620666] pci 0000:00:1c.0: restoring config space at offset 0x3 (was 0x810000, writing 0x810010) [ 344.622936] pci 0000:00:1c.0: restoring config space at offset 0x1 (was 0x100000, writing 0x100007) [ 344.625217] pci 0000:00:1c.1: restoring config space at offset 0xf (was 0x40200, writing 0x4020b) [ 344.627483] pci 0000:00:1c.1: restoring config space at offset 0x9 (was 0x10001, writing 0x80918081) [ 344.629779] pci 0000:00:1c.1: restoring config space at offset 0x8 (was 0x0, writing 0x80708060) [ 344.632079] pci 0000:00:1c.1: restoring config space at offset 0x7 (was 0x20000000, writing 0x20005050) [ 344.634367] pci 0000:00:1c.1: restoring config space at offset 0x3 (was 0x810000, writing 0x810010) [ 344.636633] pci 0000:00:1c.1: restoring config space at offset 0x1 (was 0x100000, writing 0x100007) [ 344.638923] pci 0000:00:1c.2: restoring config space at offset 0xf (was 0x40300, writing 0x4030b) [ 344.641200] pci 0000:00:1c.2: restoring config space at offset 0x9 (was 0x10001, writing 0x80518041) [ 344.643412] pci 0000:00:1c.2: restoring config space at offset 0x8 (was 0x0, writing 0x80308010) [ 344.645622] pci 0000:00:1c.2: restoring config space at offset 0x7 (was 0x20000000, writing 0x20004040) [ 344.647810] pci 0000:00:1c.2: restoring config space at offset 0x3 (was 0x810000, writing 0x810010) [ 344.650002] pci 0000:00:1c.2: restoring config space at offset 0x1 (was 0x100000, writing 0x100007) [ 344.652223] uhci_hcd 0000:00:1d.0: restoring config space at offset 0x1 (was 0x2800005, writing 0x2800001) [ 344.654461] uhci_hcd 0000:00:1d.0: wake-up capability disabled by ACPI [ 344.656676] uhci_hcd 0000:00:1d.1: restoring config space at offset 0x1 (was 0x2800005, writing 0x2800001) [ 344.658924] uhci_hcd 0000:00:1d.1: wake-up capability disabled by ACPI [ 344.661154] uhci_hcd 0000:00:1d.2: restoring config space at offset 0x1 (was 0x2800005, writing 0x2800001) [ 344.663418] uhci_hcd 0000:00:1d.2: wake-up capability disabled by ACPI [ 344.665710] uhci_hcd 0000:00:1d.3: restoring config space at offset 0x1 (was 0x2800005, writing 0x2800001) [ 344.668058] uhci_hcd 0000:00:1d.3: wake-up capability disabled by ACPI [ 344.670384] ehci_hcd 0000:00:1d.7: restoring config space at offset 0x1 (was 0x2900006, writing 0x2900002) [ 344.672780] ehci_hcd 0000:00:1d.7: wake-up capability disabled by ACPI [ 344.675140] ehci_hcd 0000:00:1d.7: PME# disabled [ 344.677545] pci 0000:00:1e.0: restoring config space at offset 0x9 (was 0x10001, writing 0x87f18401) [ 344.680014] pci 0000:00:1e.0: restoring config space at offset 0x8 (was 0x0, writing 0xf020f020) [ 344.682483] pci 0000:00:1e.0: restoring config space at offset 0x7 (was 0xa2800000, writing 0xa2803030) [ 344.685001] pci 0000:00:1e.0: restoring config space at offset 0x1 (was 0x100004, writing 0x100007) [ 344.687548] PIIX_IDE 0000:00:1f.1: restoring config space at offset 0xf (was 0x100, writing 0x1ff) [ 344.690119] ata_piix 0000:00:1f.2: restoring config space at offset 0xf (was 0x200, writing 0x20b) [ 344.692848] sky2 0000:02:00.0: restoring config space at offset 0xf (was 0x100, writing 0x10b) [ 344.695461] sky2 0000:02:00.0: restoring config space at offset 0x6 (was 0x1, writing 0x2001) [ 344.697999] sky2 0000:02:00.0: restoring config space at offset 0x4 (was 0x4, writing 0xf0000004) [ 344.700491] sky2 0000:02:00.0: restoring config space at offset 0x3 (was 0x0, writing 0x10) [ 344.702963] sky2 0000:02:00.0: restoring config space at offset 0x1 (was 0x100000, writing 0x100407) [ 344.705707] iwl3945 0000:05:00.0: restoring config space at offset 0xf (was 0x100, writing 0x10b) [ 344.708232] iwl3945 0000:05:00.0: restoring config space at offset 0x4 (was 0x0, writing 0x80100000) [ 344.710706] iwl3945 0000:05:00.0: restoring config space at offset 0x3 (was 0x0, writing 0x10) [ 344.713210] iwl3945 0000:05:00.0: restoring config space at offset 0x1 (was 0x100000, writing 0x100406) [ 344.715819] pci 0000:08:03.0: restoring config space at offset 0xf (was 0xc00100, writing 0x1c0010b) [ 344.718384] pci 0000:08:03.0: restoring config space at offset 0xe (was 0x1, writing 0x30fd) [ 344.720917] pci 0000:08:03.0: restoring config space at offset 0xd (was 0x1, writing 0x3001) [ 344.723403] pci 0000:08:03.0: restoring config space at offset 0xc (was 0x1, writing 0x34fd) [ 344.725882] pci 0000:08:03.0: restoring config space at offset 0xb (was 0x1, writing 0x3401) [ 344.728332] pci 0000:08:03.0: restoring config space at offset 0xa (was 0x0, writing 0x8bfff000) [ 344.730758] pci 0000:08:03.0: restoring config space at offset 0x9 (was 0x0, writing 0x88000000) [ 344.733180] pci 0000:08:03.0: restoring config space at offset 0x8 (was 0x0, writing 0x87fff000) [ 344.735574] pci 0000:08:03.0: restoring config space at offset 0x7 (was 0x0, writing 0x84000000) [ 344.737980] pci 0000:08:03.0: restoring config space at offset 0x6 (was 0x0, writing 0xb00c0908) [ 344.740358] pci 0000:08:03.0: restoring config space at offset 0x4 (was 0x0, writing 0x80000000) [ 344.742715] pci 0000:08:03.0: restoring config space at offset 0x1 (was 0x4100080, writing 0x4100007) [ 344.745107] pci 0000:08:03.4: restoring config space at offset 0xf (was 0x100, writing 0x10b) [ 344.747449] pci 0000:08:03.4: restoring config space at offset 0x5 (was 0x0, writing 0xf0201000) [ 344.749778] pci 0000:08:03.4: restoring config space at offset 0x4 (was 0x0, writing 0xf0200000) [ 344.752072] pci 0000:08:03.4: restoring config space at offset 0x3 (was 0x0, writing 0x2010) [ 344.754298] pci 0000:08:03.4: restoring config space at offset 0x1 (was 0x2100080, writing 0x2100017) [ 344.756787] PM: early resume of devices complete after 158.326 msecs [ 344.759029] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 344.761243] i915 0000:00:02.0: setting latency timer to 64 [ 344.761338] pci 0000:00:1c.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22 [ 344.761345] pci 0000:00:1c.0: setting latency timer to 64 [ 344.761361] pci 0000:00:1c.1: PCI INT B -> GSI 21 (level, low) -> IRQ 21 [ 344.761367] pci 0000:00:1c.1: setting latency timer to 64 [ 344.761380] pci 0000:00:1c.2: PCI INT C -> GSI 20 (level, low) -> IRQ 20 [ 344.761386] pci 0000:00:1c.2: setting latency timer to 64 [ 344.761401] uhci_hcd 0000:00:1d.0: PCI INT A -> GSI 23 (level, low) -> IRQ 23 [ 344.761409] uhci_hcd 0000:00:1d.0: setting latency timer to 64 [ 344.761439] usb usb2: root hub lost power or was reset [ 344.761460] uhci_hcd 0000:00:1d.1: PCI INT B -> GSI 20 (level, low) -> IRQ 20 [ 344.761468] uhci_hcd 0000:00:1d.1: setting latency timer to 64 [ 344.761496] usb usb3: root hub lost power or was reset [ 344.761514] uhci_hcd 0000:00:1d.2: PCI INT C -> GSI 18 (level, low) -> IRQ 18 [ 344.761522] uhci_hcd 0000:00:1d.2: setting latency timer to 64 [ 344.761549] usb usb4: root hub lost power or was reset [ 344.761567] uhci_hcd 0000:00:1d.3: PCI INT D -> GSI 16 (level, low) -> IRQ 16 [ 344.761576] uhci_hcd 0000:00:1d.3: setting latency timer to 64 [ 344.761604] usb usb5: root hub lost power or was reset [ 344.761624] ehci_hcd 0000:00:1d.7: PCI INT A -> GSI 23 (level, low) -> IRQ 23 [ 344.761632] ehci_hcd 0000:00:1d.7: setting latency timer to 64 [ 344.761675] pci 0000:00:1e.0: setting latency timer to 64 [ 344.761694] PIIX_IDE 0000:00:1f.1: PCI INT A -> GSI 18 (level, low) -> IRQ 18 [ 344.761700] PIIX_IDE 0000:00:1f.1: setting latency timer to 64 [ 344.761723] ata_piix 0000:00:1f.2: PCI INT B -> GSI 19 (level, low) -> IRQ 19 [ 344.761730] ata_piix 0000:00:1f.2: setting latency timer to 64 [ 344.762438] sky2 0000:02:00.0: wake-up capability disabled by ACPI [ 344.762462] sky2 0000:02:00.0: PME# disabled [ 344.768820] pci 0000:08:03.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 344.769454] serial 00:0a: activated [ 344.772573] hda: host max PIO4 wanted PIO255(auto-tune) selected PIO4 [ 344.772828] hda: UDMA/33 mode selected [ 344.835139] sd 0:0:0:0: [sda] Starting disk [ 344.897591] render error detected, EIR: 0x00000010 [ 344.899856] page table error [ 344.900004] PGTBL_ER: 0x00000003 [ 344.900004] [drm:i915_report_and_clear_eir] *ERROR* EIR stuck: 0x00000010, masking [ 344.900004] render error detected, EIR: 0x00000010 [ 344.900004] page table error [ 344.900004] PGTBL_ER: 0x00000003 [ 345.168077] usb 5-2: reset full-speed USB device number 3 using uhci_hcd [ 345.260090] snd_hda_intel 0000:00:1b.0: power state changed by ACPI to D0 [ 345.263106] snd_hda_intel 0000:00:1b.0: power state changed by ACPI to D0 [ 345.266113] snd_hda_intel 0000:00:1b.0: power state changed by ACPI to D0 [ 345.269115] snd_hda_intel 0000:00:1b.0: power state changed by ACPI to D0 [ 345.271430] snd_hda_intel 0000:00:1b.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 345.273684] snd_hda_intel 0000:00:1b.0: setting latency timer to 64 [ 345.275966] snd_hda_intel 0000:00:1b.0: irq 41 for MSI/MSI-X [ 345.572088] usb 2-2: reset low-speed USB device number 2 using uhci_hcd [ 346.608301] ata1.00: ACPI cmd ef/03:0c:00:00:00:a0 (SET FEATURES) filtered out [ 346.611333] ata1.00: ACPI cmd ef/03:45:00:00:00:a0 (SET FEATURES) filtered out [ 346.614399] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out [ 346.632440] ata1.00: configured for UDMA/133 [ 346.744496] PM: resume of devices complete after 1985.491 msecs [ 346.747333] PM: Finishing wakeup. [ 346.749785] Restarting tasks ... done. [ 346.789225] video LNXVIDEO:00: Restoring backlight state [ 347.244077] ieee80211 phy0: wlan0: No probe response from AP 00:0b:6b:3c:8c:e4 after 500ms, try 1/5 [ 347.744100] ieee80211 phy0: wlan0: No probe response from AP 00:0b:6b:3c:8c:e4 after 500ms, try 2/5 [ 348.004058] wlan0: detected beacon loss from AP - sending probe request [ 348.244038] ieee80211 phy0: wlan0: No probe response from AP 00:0b:6b:3c:8c:e4 after 500ms, try 3/5 [ 348.744062] ieee80211 phy0: wlan0: No probe response from AP 00:0b:6b:3c:8c:e4 after 500ms, try 4/5 [ 349.244066] ieee80211 phy0: wlan0: No probe response from AP 00:0b:6b:3c:8c:e4 after 500ms, disconnecting. [ 349.316045] ieee80211 phy0: Removed STA 00:0b:6b:3c:8c:e4 [ 349.316070] iwl3945_rs_free_sta rs_sta f4be1ac0 [ 349.316076] ------------[ cut here ]------------ [ 349.316097] WARNING: at drivers/net/wireless/iwlegacy/iwl-3945-rs.c:438 iwl3945_rs_free_sta+0x33/0x42 [iwl3945]() [ 349.316105] Hardware name: LIFEBOOK S7110 [ 349.316110] Modules linked in: aes_i586 aes_generic i915 fbcon font bitblit softcursor drm_kms_helper drm fb fbdev i2c_algo_bit cfbcopyarea i2c_core cfbimgblt cfbfillrect fuse tun coretemp hwmon snd_hda_codec_realtek arc4 snd_hda_intel snd_hda_codec snd_pcm_oss snd_mixer_oss iwl3945 snd_pcm iwl_legacy snd_seq_oss snd_seq_midi_event mac80211 snd_seq snd_timer snd_seq_device cfg80211 snd video snd_page_alloc fujitsu_laptop backlight [last unloaded: scsi_wait_scan] [ 349.316203] Pid: 12, comm: kworker/u:1 Tainted: G W 3.2.0-rc3-timerstest-00009-g762dd0e #20 [ 349.316209] Call Trace: [ 349.316223] [] warn_slowpath_common+0x68/0x7d [ 349.316237] [] ? iwl3945_rs_free_sta+0x33/0x42 [iwl3945] [ 349.316247] [] warn_slowpath_null+0x14/0x18 [ 349.316260] [] iwl3945_rs_free_sta+0x33/0x42 [iwl3945] [ 349.316283] [] __sta_info_free.isra.24+0x28/0x60 [mac80211] [ 349.316304] [] __sta_info_destroy+0x259/0x283 [mac80211] [ 349.316328] [] sta_info_flush+0x43/0x6e [mac80211] [ 349.316353] [] ieee80211_set_disassoc+0x1a3/0x1d7 [mac80211] [ 349.316379] [] ieee80211_sta_connection_lost+0x31/0x8a [mac80211] [ 349.316390] [] ? dev_printk+0x2b/0x2d [ 349.316416] [] ieee80211_sta_work+0x1b0/0x1c3 [mac80211] [ 349.316446] [] ieee80211_iface_work+0x23e/0x250 [mac80211] [ 349.316457] [] process_one_work+0x19b/0x2e6 [ 349.316483] [] ? ieee80211_netdev_select_queue+0x14/0x14 [mac80211] [ 349.316492] [] worker_thread+0x136/0x1ee [ 349.316501] [] ? manage_workers.isra.23+0x14f/0x14f [ 349.316509] [] kthread+0x67/0x6c [ 349.316517] [] ? kthread_worker_fn+0x119/0x119 [ 349.316527] [] kernel_thread_helper+0x6/0x10 [ 349.316532] ---[ end trace 5cf96275a244e7ca ]--- [ 349.316538] ieee80211 phy0: Destroyed STA 00:0b:6b:3c:8c:e4 [ 349.316556] ieee80211 phy0: device now idle [ 349.328105] cfg80211: Calling CRDA to update world regulatory domain [ 349.416952] ieee80211 phy0: device no longer idle - scanning [ 353.091211] ieee80211 phy0: device now idle [ 358.092230] ieee80211 phy0: device no longer idle - scanning [ 361.772470] ieee80211 phy0: device now idle [ 366.774826] ieee80211 phy0: device no longer idle - scanning [ 370.448401] ieee80211 phy0: device now idle [ 375.455127] ieee80211 phy0: device no longer idle - scanning [ 379.127638] ieee80211 phy0: device now idle [ 384.131847] ieee80211 phy0: device no longer idle - scanning [ 387.806711] ieee80211 phy0: device now idle [ 396.708125] sky2 0000:02:00.0: lan0: Link is up at 1000 Mbps, full duplex, flow control both [ 407.120063] lan0: no IPv6 routers present [ 434.003896] ieee80211 phy0: device no longer idle - scanning [ 438.694843] ieee80211 phy0: device now idle [ 441.485602] process `skype' is using obsolete setsockopt SO_BSDCOMPAT [ 494.004619] ieee80211 phy0: device no longer idle - scanning [ 498.698796] ieee80211 phy0: device now idle [ 554.004822] ieee80211 phy0: device no longer idle - scanning [ 558.697908] ieee80211 phy0: device now idle [ 614.003956] ieee80211 phy0: device no longer idle - scanning [ 618.700408] ieee80211 phy0: device now idle [ 674.004164] ieee80211 phy0: device no longer idle - scanning [ 678.702423] ieee80211 phy0: device now idle -- Michal Hocko SUSE Labs SUSE LINUX s.r.o. Lihovarska 1060/12 190 00 Praha 9 Czech Republic