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
