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Date: Fri, 4 Dec 2015 16:28:53 +0000 From: "Shevchenko, Andriy" <andriy.shevchenko@...el.com> To: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: v4.4-rc3: rcu_sched self-detected stall Get 100% reproducible result on 4.4-rc3 on Intel BayTrail platform Any suggestions? P.S. Something like that was on 4.1-rc7 (same kernel config), though didn't gather the traceback. [ 0.000000] Command line: vmlinuz.efi initrd=initrd console=ttyS0,115200n8 [ 3.680557] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x13381e82524, max_idle_ns: 440795248224 ns [ 23.938953] INFO: rcu_sched self-detected stall on CPU[ 23.939947] INFO: rcu_sched detected stalls on CPUs/ta sks: [ 23.939955] 3-...: (20996 ticks this GP) idle=4e3/140000000000001/0 softirq=203/203 fqs=589 [ 23.939956] (detected by 0, t=21002 jiffies, g=-173, c=-174, q=90) [ 23.939962] Task dump for CPU 3: [ 23.939964] swapper/0 R running task 13280 1 0 0x00000008 [ 23.939975] 0000000000000286 ffff880036e97bd8 ffffffff8130528d 0000000000000001 [ 23.939980] ffff880036c2c810 00000000025000c0 0000000000000202 0000000000000202 [ 23.939984] ffff880036e97c20 ffffffff813053a5 0000241b8115f5db 0000241b811d77ec [ 23.939989] Call Trace: [ 23.940002] [<ffffffff8130528d>] ? ida_pre_get+0x4d/0xe0 [ 23.940006] [<ffffffff813053a5>] ? ida_simple_get+0x85/0xe0 [ 23.940012] [<ffffffff811d8815>] ? kernfs_activate+0x75/0xe0 [ 23.940016] [<ffffffff811d897e>] ? kernfs_add_one+0xfe/0x160 [ 23.940021] [<ffffffff811d9f1a>] ? __kernfs_create_file+0x6a/0x90 [ 23.940025] [<ffffffff811da6c4>] ? sysfs_add_file_mode_ns+0x94/0x180 [ 23.940029] [<ffffffff81306e45>] ? kobject_uevent_env+0x75/0x640 [ 23.940034] [<ffffffff8141cca6>] ? klist_children_get+0x16/0x20 [ 23.940039] [<ffffffff81013760>] ? subcaches_show+0x40/0x40 [ 23.940045] [<ffffffff810be900>] ?smp_call_function_single+0xb0/0x100 [ 23.940049] [<ffffffff810be8f6>] ? smp_call_function_single+0xa6/0x100 [ 23.940053] [<ffffffff81013760>] ? subcaches_show+0x40/0x40 [ 23.940057] [<ffffffff810147ed>] ? init_cache_level+0x1d/0x30 [ 23.940062] [<ffffffff81427119>] ? detect_cache_attributes+0x19/0x1a0 [ 23.940065] [<ffffffff814273f9>] ? cache_add_dev+0x159/0x1f0 [ 23.940071] [<ffffffff81f8cade>] ? container_dev_init+0x2d/0x2d [ 23.940074] [<ffffffff81f8cb1e>] ? cacheinfo_sysfs_init+0x40/0x8a [ 23.940078] [<ffffffff810003d6>] ? do_one_initcall+0xa6/0x1c0 [ 23.940083] [<ffffffff81f4c059>] ? kernel_init_freeable+0x145/0x1d0 [ 23.940087] [<ffffffff81830930>] ? rest_init+0x80/0x80 [ 23.940091] [<ffffffff81830939>] ? kernel_init+0x9/0xe0 [ 23.940095] [<ffffffff8183649f>] ? ret_from_fork+0x3f/0x70 [ 23.940098] [<ffffffff81830930>] ? rest_init+0x80/0x80 [ 23.940103] rcu_sched kthread starved for 19217 jiffies! g18446744073709551443 c18446744073709551442 f0x0 s3 ->state=0x0 [ 24.171981] 3-...: (20996 ticks this GP) idle=4e3/140000000000001/0 softirq=203/203 fqs=589 [ 24.181520] (t=21244 jiffies g=-173 c=-174 q=90) [ 24.186877] rcu_sched kthread starved for 19463 jiffies! g18446744073709551443 c18446744073709551442 f0x2 s3 ->state=0x0 [ 24.199044] Task dump for CPU 3: [ 24.202651] swapper/0 R running task 13280 1 0 0x00000008 [ 24.210544] ffffffff81e3ee80 ffff88003b383dd0 ffffffff8107a616 0000000000000003 [ 24.218829] ffffffff81e3ee80 ffff88003b383de8 ffffffff8107c982 0000000000000004 [ 24.227121] ffff88003b383e18 ffffffff810a3a69 ffff88003b395dc0 ffffffff81e3ee80 [ 24.235414] Call Trace: [ 24.238153] <IRQ> [<ffffffff8107a616>] sched_show_task+0xb6/0x110 [ 24.245171] [<ffffffff8107c982>] dump_cpu_task+0x32/0x40 [ 24.251213] [<ffffffff810a3a69>] rcu_dump_cpu_stacks+0x89/0xe0 [ 24.257837] [<ffffffff810a7379>] rcu_check_callbacks+0x4b9/0x7b0 [ 24.264657] [<ffffffff810b9f40>] ? tick_sched_do_timer+0x30/0x30 [ 24.271481] [<ffffffff810abca4>] update_process_times+0x34/0x60 [ 24.278203] [<ffffffff810b99c1>] tick_sched_handle.isra.14+0x31/0x40 [ 24.285410] [<ffffffff810b9f7b>] tick_sched_timer+0x3b/0x70 [ 24.291744] [<ffffffff810ac49a>] __hrtimer_run_queues+0xda/0x200 [ 24.298563] [<ffffffff810acb43>] hrtimer_interrupt+0xa3/0x190 [ 24.305090] [<ffffffff81013760>] ? subcaches_show+0x40/0x40 [ 24.311424] [<ffffffff810394c3>] local_apic_timer_interrupt+0x33/0x50 [ 24.318728] [<ffffffff81039ec8>] smp_apic_timer_interrupt+0x38/0x50 [ 24.325839] [<ffffffff81836e8f>] apic_timer_interrupt+0x7f/0x90 [ 24.332558] <EOI> [<ffffffff81013760>] ? subcaches_show+0x40/0x40 [ 24.339591] [<ffffffff810be900>] ? smp_call_function_single+0xb0/0x100 [ 24.346993] [<ffffffff810be8f6>] ? smp_call_function_single+0xa6/0x100 [ 24.354396] [<ffffffff81013760>] ? subcaches_show+0x40/0x40 [ 24.360728] [<ffffffff810147ed>] init_cache_level+0x1d/0x30 [ 24.367060] [<ffffffff81427119>] detect_cache_attributes+0x19/0x1a0 [ 24.374170] [<ffffffff814273f9>] ? cache_add_dev+0x159/0x1f0 [ 24.380600] [<ffffffff81f8cade>] ? container_dev_init+0x2d/0x2d [ 24.387321] [<ffffffff81f8cb1e>] cacheinfo_sysfs_init+0x40/0x8a [ 24.394042] [<ffffffff810003d6>] do_one_initcall+0xa6/0x1c0 [ 24.400375] [<ffffffff81f4c059>] kernel_init_freeable+0x145/0x1d0 [ 24.407290] [<ffffffff81830930>] ? rest_init+0x80/0x80 [ 24.413135] [<ffffffff81830939>] kernel_init+0x9/0xe0 [ 24.418884] [<ffffffff8183649f>] ret_from_fork+0x3f/0x70 [ 24.424923] [<ffffffff81830930>] ? rest_init+0x80/0x80 Kernel configuration (diff to x86_64_defconfig) +CONFIG_E1000E=y +CONFIG_R8169=y +CONFIG_USB_RTL8152=y +CONFIG_STMMAC_ETH=y +CONFIG_STMMAC_PCI=y -CONFIG_HPET=y +# CONFIG_HPET is not set -CONFIG_DRM_I915=y +# CONFIG_DRM_I915 is not set +CONFIG_BACKLIGHT_LCD_SUPPORT=y -CONFIG_SND_HDA_INTEL=y -CONFIG_SND_HDA_HWDEP=y +# CONFIG_SND_HDA_INTEL is not set +# CONFIG_SND_HDA_HWDEP is not set +CONFIG_I2C_DESIGNWARE_PCI=y +CONFIG_GPIOLIB=y +CONFIG_GPIO_INTEL_MID=y +CONFIG_INTEL_MID_WATCHDOG=y +CONFIG_NOP_USB_XCEIV=y +CONFIG_USB_CHIPIDEA=y +CONFIG_USB_CHIPIDEA_UDC=y +CONFIG_USB_CHIPIDEA_HOST=y +CONFIG_X86_EXTENDED_PLATFORM=y +CONFIG_X86_INTEL_MID=y +CONFIG_INTEL_IDMA64=y +CONFIG_MFD_CORE=y +CONFIG_MFD_INTEL_LPSS_PCI=y +CONFIG_MFD_INTEL_LPSS_ACPI=y +CONFIG_EFI_STUB=y +CONFIG_EFI_MIXED=y +CONFIG_EARLY_PRINTK_EFI=y +CONFIG_FB=y +CONFIG_FRAMEBUFFER_CONSOLE=y +CONFIG_DYNAMIC_DEBUG=y +CONFIG_USB_XHCI_HCD=y +CONFIG_USB_DWC3=y +CONFIG_USB_DWC3_GADGET=y +CONFIG_USB_SERIAL=y +CONFIG_USB_SERIAL_PL2303=y +CONFIG_USB_USBNET=y +CONFIG_USB_NET_AX88179_178A=y +CONFIG_USB_NET_MCS7830=y +CONFIG_USB_NET_AX8817X=y +CONFIG_PM_RUNTIME=y +CONFIG_SERIAL_8250_DMA=y +CONFIG_SERIAL_8250_PCI=y +CONFIG_SERIAL_8250_MID=y +CONFIG_SERIAL_8250_DW=y -- Andy Shevchenko <andriy.shevchenko@...el.com> Intel Finland Oy --------------------------------------------------------------------- Intel Finland Oy Registered Address: PL 281, 00181 Helsinki Business Identity Code: 0357606 - 4 Domiciled in Helsinki This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). 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