Hello, I too faced a similar issue on startup when I ran v4.11.12-rt10 on a virtual QEMU-KVM setup with Arch Linux. The kernel panics when the Locking API test suite runs during the startup. I'm not sure if these could be related. Stacktrace: [ 0.000000] recursive read-lock: | [ 0.000000] ------------[ cut here ]------------ [ 0.000000] kernel BUG at kernel/locking/rtmutex.c:1059! [ 0.000000] invalid opcode: 0000 [#1] PREEMPT SMP [ 0.000000] Modules linked in: [ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.11.12-rt10 #2 [ 0.000000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.1-0-gb3ef39f-prebuilt.qemu-project.org 04/01/2014 [ 0.000000] task: ffffffff82055500 task.stack: ffffffff82000000 [ 0.000000] RIP: 0010:rt_spin_lock_slowlock_locked+0x28f/0x2c0 [ 0.000000] RSP: 0000:ffffffff82003d50 EFLAGS: 00010046 [ 0.000000] RAX: ffffffff82055500 RBX: ffffffff820f7d00 RCX: 0000000000000001 [ 0.000000] RDX: 0000000000000000 RSI: ffffffff82055501 RDI: ffffffff820f7d18 [ 0.000000] RBP: ffffffff82003d90 R08: 0000000000000000 R09: 0000000000000000 [ 0.000000] R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff82003da0 [ 0.000000] R13: ffffffff82055500 R14: ffffffff813e5450 R15: 0000000000000286 [ 0.000000] FS: 0000000000000000(0000) GS:ffff88003de00000(0000) knlGS:0000000000000000 [ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.000000] CR2: ffff88000330f000 CR3: 0000000002050000 CR4: 00000000000006b0 [ 0.000000] Call Trace: [ 0.000000] ? AA_mutex+0x20/0x20 [ 0.000000] ? AA_mutex+0x20/0x20 [ 0.000000] rt_spin_lock_slowlock+0x58/0x80 [ 0.000000] __rt_spin_lock+0xe/0x10 [ 0.000000] rt_read_lock+0x3b/0x50 [ 0.000000] ? rlock_AA1+0x1c/0x20 [ 0.000000] rlock_AA1+0x1c/0x20 [ 0.000000] dotest+0x3c/0x694 [ 0.000000] locking_selftest+0x699/0xfd0 [ 0.000000] start_kernel+0x2d1/0x3ed [ 0.000000] x86_64_start_reservations+0x2a/0x2c [ 0.000000] x86_64_start_kernel+0x178/0x18b [ 0.000000] start_cpu+0x14/0x14 [ 0.000000] ? start_cpu+0x14/0x14 [ 0.000000] Code: 85 35 ff ff ff 48 c7 c2 78 b4 e5 81 be 5b 03 00 00 48 c7 c7 21 b0 e5 81 c6 05 c1 14 67 00 01 e8 48 f3 67 ff e9 11 ff ff ff 0f 0b <0f> 0b 0f 0b 48 8b 43 50 48 3b 58 38 75 18 49 39 c4 0f 85 66 ff [ 0.000000] RIP: rt_spin_lock_slowlock_locked+0x28f/0x2c0 RSP: ffffffff82003d50 [ 0.000000] ---[ end trace 0000000000000001 ]--- [ 0.000000] Kernel panic - not syncing: Attempted to kill the idle task! - Pratyush On Thu, Aug 31, 2017 at 2:55 AM, Mart van de Wege <mvdwege@xxxxxxxxx> wrote: > Hi, > > As of v4.11.12-rt8 my laptop runs into trouble booting up, throwing a > kernel BUG when starting up bluetooth. Bisecting *seems* to lead back to > commit 6fb87cb1181786dc88432c6c6093a02a897e5789, 'Add the hotplug rework > including all its side stories'. > > The issue persists up to v4.11.12-rt10 > > Stacktrace: > > Aug 29 17:28:04 localhost kernel: [ 46.483810] ------------[ cut here ]------------ > Aug 29 17:28:04 localhost kernel: [ 46.483812] kernel BUG at kernel/locking/rtmutex.c:1059! > Aug 29 17:28:04 localhost kernel: [ 46.483816] invalid opcode: 0000 [#1] PREEMPT SMP > Aug 29 17:28:04 localhost kernel: [ 46.483817] Modules linked in: cmac bnep msr fuse intel_rapl intel_powerclamp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel uvcvideo videobuf2_vmalloc videobuf2_memops video > buf2_v4l2 videobuf2_core videodev pcbc media aesni_intel btusb joydev evdev aes_x86_64 btrtl crypto_simd glue_helper serio_raw cryptd intel_cstate intel_uncore hci_uart intel_rapl_perf btbcm efi_pstore arc4 snd_hda_codec_hdmi snd_hda_code > c_realtek snd_hda_codec_generic btqca btintel iwlmvm snd_hda_intel mac80211 snd_hda_codec pcspkr snd_hda_core iwlwifi i915 snd_hwdep snd_pcm_oss iTCO_wdt sg efivars iTCO_vendor_support rtsx_pci_ms memstick wmi bluetooth crc16 drm_kms_help > er snd_mixer_oss snd_pcm snd_timer mei_me snd cfg80211 drm soundcore mei rfkill i2c_algo_bit intel_lpss_acpi intel_lpss video battery > Aug 29 17:28:04 localhost kernel: [ 46.483870] ac acpi_pad button intel_pch_thermal tpm_crb shpchp binfmt_misc nls_ascii nls_cp437 vfat fat coretemp ecryptfs cbc encrypted_keys parport_pc ppdev lp parport loop dm_crypt dm_mod sunrpc ef > ivarfs ip_tables x_tables autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c crc32c_generic raid1 raid0 multipath linear md_mod sr_mod cdrom sd_mod mmc_block rtsx_pci_sdmmc mmc_c > ore ahci libahci xhci_pci xhci_hcd libata rtsx_pci r8169 crc32c_intel psmouse mfd_core mii i2c_i801 scsi_mod usbcore thermal i2c_hid hid > Aug 29 17:28:04 localhost kernel: [ 46.483945] CPU: 3 PID: 227 Comm: kworker/u9:0 Not tainted 4.11.12-rt8+ #6 > Aug 29 17:28:04 localhost kernel: [ 46.483947] Hardware name: Notebook W94_95_97JU/W94_95_97JU, BIOS 5.11 10/21/2015 > Aug 29 17:28:04 localhost kernel: [ 46.483988] Workqueue: hci0 hci_rx_work [bluetooth] > Aug 29 17:28:04 localhost kernel: [ 46.483990] task: ffff935b9a506000 task.stack: ffff9edcc3398000 > Aug 29 17:28:04 localhost kernel: [ 46.483996] RIP: 0010:rt_spin_lock_slowlock_locked+0x26e/0x2d0 > Aug 29 17:28:04 localhost kernel: [ 46.483998] RSP: 0018:ffff9edcc339bb20 EFLAGS: 00010046 > Aug 29 17:28:04 localhost kernel: [ 46.484000] RAX: ffff935b9a506000 RBX: ffffffffc0b13268 RCX: 0000000000000001 > Aug 29 17:28:04 localhost kernel: [ 46.484002] RDX: 0000000000000000 RSI: ffff935b9a506000 RDI: ffffffffc0b13268 > Aug 29 17:28:04 localhost kernel: [ 46.484003] RBP: 0000000000000246 R08: ffff935b9a506000 R09: ffffffffc0b13280 > Aug 29 17:28:04 localhost kernel: [ 46.484004] R10: ffff935b9a506001 R11: 0000000000000001 R12: ffff935b9a506000 > Aug 29 17:28:04 localhost kernel: [ 46.484005] R13: ffff9edcc339bb68 R14: 0000000000000246 R15: ffff935b8f0de800 > Aug 29 17:28:04 localhost kernel: [ 46.484008] FS: 0000000000000000(0000) GS:ffff935bb3d80000(0000) knlGS:0000000000000000 > Aug 29 17:28:04 localhost kernel: [ 46.484009] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > Aug 29 17:28:04 localhost kernel: [ 46.484011] CR2: 0000009b9614e800 CR3: 0000000418c0e000 CR4: 00000000003406e0 > Aug 29 17:28:04 localhost kernel: [ 46.484012] Call Trace: > Aug 29 17:28:04 localhost kernel: [ 46.484019] ? __slab_alloc.isra.76+0x72/0xb0 > Aug 29 17:28:04 localhost kernel: [ 46.484023] ? rt_spin_lock_slowlock+0x50/0x80 > Aug 29 17:28:04 localhost kernel: [ 46.484029] ? __kmalloc_reserve.isra.35+0x2e/0x80 > Aug 29 17:28:04 localhost kernel: [ 46.484056] ? hci_send_to_channel+0x2c/0xe0 [bluetooth] > Aug 29 17:28:04 localhost kernel: [ 46.484080] ? hci_send_monitor_ctrl_event+0x17a/0x1b0 [bluetooth] > Aug 29 17:28:04 localhost kernel: [ 46.484108] ? mgmt_send_event+0x104/0x110 [bluetooth] > Aug 29 17:28:04 localhost kernel: [ 46.484131] ? mgmt_set_class_of_dev_complete+0xb6/0x150 [bluetooth] > Aug 29 17:28:04 localhost kernel: [ 46.484152] ? hci_cmd_complete_evt+0x15c5/0x2f40 [bluetooth] > Aug 29 17:28:04 localhost kernel: [ 46.484172] ? hci_event_packet+0x13b2/0x2cd0 [bluetooth] > Aug 29 17:28:04 localhost kernel: [ 46.484178] ? cpuacct_charge+0x5f/0x80 > Aug 29 17:28:04 localhost kernel: [ 46.484181] ? unpin_current_cpu+0x37/0x90 > Aug 29 17:28:04 localhost kernel: [ 46.484187] ? migrate_enable+0x230/0x380 > Aug 29 17:28:04 localhost kernel: [ 46.484206] ? hci_rx_work+0x192/0x370 [bluetooth] > Aug 29 17:28:04 localhost kernel: [ 46.484222] ? hci_rx_work+0x192/0x370 [bluetooth] > Aug 29 17:28:04 localhost kernel: [ 46.484226] ? process_one_work+0x174/0x480 > Aug 29 17:28:04 localhost kernel: [ 46.484230] ? worker_thread+0x4a/0x4d0 > Aug 29 17:28:04 localhost kernel: [ 46.484233] ? process_one_work+0x480/0x480 > Aug 29 17:28:04 localhost kernel: [ 46.484237] ? kthread+0x118/0x130 > Aug 29 17:28:04 localhost kernel: [ 46.484241] ? kthread_create_on_node+0x70/0x70 > Aug 29 17:28:04 localhost kernel: [ 46.484244] ? do_group_exit+0x47/0xc0 > Aug 29 17:28:04 localhost kernel: [ 46.484247] ? ret_from_fork+0x25/0x30 > Aug 29 17:28:04 localhost kernel: [ 46.484250] Code: ff ff ff 7f 0f 85 4b fe ff ff 41 8b 74 24 08 85 f6 0f 85 3e fe ff ff 49 8b 04 24 f6 c4 02 0f 84 31 fe ff ff e9 27 fe ff ff 0f 0b <0f> 0b a9 ff ff ff 7f 0f 85 20 ff ff ff 41 8b 46 08 8 > 5 c0 0f 85 > Aug 29 17:28:04 localhost kernel: [ 46.484286] RIP: rt_spin_lock_slowlock_locked+0x26e/0x2d0 RSP: ffff9edcc339bb20 > Aug 29 17:28:04 localhost kernel: [ 46.561380] ---[ end trace 0000000000000002 ]--- > > -- > "We will need a longer wall when the revolution comes." > --- AJS, quoting an uncertain source. > -- > To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
