FYI, we noticed the below changes on commit 8787dbe5ef7e61385140c771fc6fe8f1689f11fa ("sched: Simplify preempt_count tests") +--------------------------------------------------+----------+------------+ | | v4.3-rc3 | 8787dbe5ef | +--------------------------------------------------+----------+------------+ | boot_successes | 54 | 0 | | boot_failures | 10 | 34 | | IP-Config:Auto-configuration_of_network_failed | 10 | | | BUG:scheduling_while_atomic | 0 | 34 | | backtrace:spawn_ksoftirqd | 0 | 34 | | backtrace:kernel_init_freeable | 0 | 34 | | backtrace:kasprintf | 0 | 34 | | backtrace:create_worker | 0 | 34 | | backtrace:init_workqueues | 0 | 34 | | backtrace:alloc_workqueue_attrs | 0 | 34 | | backtrace:__alloc_workqueue_key | 0 | 34 | | backtrace:kthread_create_on_node | 0 | 34 | | backtrace:rcu_spawn_all_nocb_kthreads | 0 | 34 | | backtrace:smpboot_register_percpu_thread_cpumask | 0 | 32 | | backtrace:cpu_stop_init | 0 | 32 | | backtrace:watchdog_enable_all_cpus | 0 | 34 | | backtrace:lockup_detector_init | 0 | 34 | | backtrace:fork_idle | 0 | 2 | | backtrace:idle_threads_init | 0 | 2 | | backtrace:smp_init | 0 | 33 | | backtrace:cpu_up | 0 | 2 | | backtrace:set_mtrr | 0 | 33 | | backtrace:mtrr_aps_init | 0 | 33 | | backtrace:native_smp_cpus_done | 0 | 33 | | backtrace:page_alloc_init_late | 0 | 33 | | backtrace:devtmpfs_init | 0 | 33 | | backtrace:driver_init | 0 | 33 | | backtrace:_cond_resched | 0 | 7 | | backtrace:pm_init | 0 | 33 | | backtrace:kobject_create_and_add | 0 | 33 | | backtrace:cgroup_wq_init | 0 | 33 | | backtrace:perf_workqueue_init | 0 | 33 | | backtrace:cpuidle_register_governor | 0 | 2 | | backtrace:init_ladder | 0 | 2 | | backtrace:blk_dev_init | 0 | 32 | | backtrace:genhd_device_init | 0 | 32 | | backtrace:acpi_os_initialize1 | 0 | 32 | | backtrace:acpi_init | 0 | 32 | | backtrace:md_init | 0 | 27 | | backtrace:hpet_cpuhp_notify | 0 | 1 | | backtrace:hpet_late_init | 0 | 1 | | backtrace:clocksource_done_booting | 0 | 23 | | backtrace:acpi_get_devices | 0 | 1 | | backtrace:pnpacpi_init | 0 | 1 | | backtrace:device_create | 0 | 22 | | backtrace:chr_dev_init | 0 | 22 | | backtrace:vfs_write | 0 | 16 | | backtrace:SyS_write | 0 | 16 | | backtrace:populate_rootfs | 0 | 17 | | backtrace:do_sys_open | 0 | 15 | | backtrace:SyS_open | 0 | 15 | | backtrace:SYSC_symlinkat | 0 | 12 | | backtrace:SyS_symlink | 0 | 12 | | backtrace:kset_create_and_add | 0 | 15 | | backtrace:devices_init | 0 | 17 | | backtrace:hung_task_init | 0 | 31 | | backtrace:default_bdi_init | 0 | 31 | | backtrace:kmem_cache_alloc | 0 | 30 | | backtrace:bdi_init | 0 | 30 | | backtrace:crypto_wq_init | 0 | 30 | | backtrace:bioset_create | 0 | 30 | | backtrace:init_bio | 0 | 30 | | backtrace:sched_init_smp | 0 | 31 | | backtrace:register_sched_domain_sysctl | 0 | 31 | | backtrace:wait_for_completion | 0 | 31 | | backtrace:kern_mount_data | 0 | 2 | | backtrace:shmem_init | 0 | 2 | | backtrace:_do_fork | 0 | 5 | | backtrace:kthreadd | 0 | 5 | | backtrace:misc_register | 0 | 28 | | backtrace:vga_arb_device_init | 0 | 28 | | backtrace:tifm_init | 0 | 28 | | backtrace:bus_register | 0 | 26 | | backtrace:edac_init | 0 | 24 | | backtrace:mmc_init | 0 | 24 | | backtrace:devfreq_init | 0 | 24 | | backtrace:fscache_init | 0 | 22 | | backtrace:cachefiles_init | 0 | 21 | | backtrace:tty_init | 0 | 15 | | backtrace:device_create_with_groups | 0 | 15 | | backtrace:user_path_create | 0 | 16 | | backtrace:SyS_mkdirat | 0 | 16 | | backtrace:SyS_mkdir | 0 | 16 | | backtrace:SYSC_fchownat | 0 | 7 | | backtrace:SyS_lchown | 0 | 6 | | backtrace:classes_init | 0 | 1 | | backtrace:vfs_lstat | 0 | 13 | | backtrace:SyS_newlstat | 0 | 13 | | backtrace:SyS_mknodat | 0 | 4 | | backtrace:SyS_mknod | 0 | 4 | | backtrace:device_register | 0 | 4 | | backtrace:platform_bus_init | 0 | 6 | | backtrace:unshare_nsproxy_namespaces | 0 | 3 | | backtrace:SyS_unshare | 0 | 3 | | backtrace:devtmpfsd | 0 | 3 | | backtrace:subsys_system_register | 0 | 1 | | backtrace:memory_dev_init | 0 | 1 | | backtrace:user_path_at_empty | 0 | 2 | | backtrace:SyS_fchmodat | 0 | 3 | | backtrace:SyS_chmod | 0 | 3 | | backtrace:pcpu_balance_workfn | 0 | 1 | | backtrace:do_sys_ftruncate | 0 | 3 | | backtrace:SyS_ftruncate | 0 | 3 | | backtrace:mnt_want_write_file | 0 | 2 | | backtrace:SyS_fchown | 0 | 3 | | backtrace:chmod_common | 0 | 2 | | backtrace:SyS_fchmod | 0 | 2 | | backtrace:chown_common | 0 | 1 | | backtrace:do_mount | 0 | 1 | | backtrace:SyS_mount | 0 | 1 | | backtrace:SyS_chown | 0 | 2 | | backtrace:firmware_init | 0 | 2 | | backtrace:vfs_mknod | 0 | 1 | +--------------------------------------------------+----------+------------+ [ 0.831646] TSC deadline timer enabled [ 0.832230] smpboot: CPU0: Intel Core Processor (Haswell) (family: 0x6, model: 0x3c, stepping: 0x1) [ 0.835984] Performance Events: unsupported p6 CPU model 60 no PMU driver, software events only. [ 0.837205] BUG: scheduling while atomic: swapper/0/1/0x00200001 [ 0.837964] 2 locks held by swapper/0/1: [ 0.838444] #0: (cpu_hotplug.lock){.+.+.+}, at: [<c104408a>] get_online_cpus+0x27/0x62 [ 0.839534] #1: (smpboot_threads_lock){+.+.+.}, at: [<c105ae50>] smpboot_register_percpu_thread_cpumask+0x24/0xa1 [ 0.840902] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.3.0-rc3-00001-g8787dbe #364 [ 0.857965] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 0.859204] 00000000 00000000 d4463de0 c1219245 d4478000 d4463dec c105c084 00000000 [ 0.860238] d4463e10 c17aedc2 c1060ee7 00000000 d4463e70 d4478000 d4464000 d4463e70 [ 0.861270] d4463e9c d4463e1c c17af1b9 7fffffff d4463e24 c17af2d6 d4463e58 c17af88a [ 0.862299] Call Trace: [ 0.862597] [<c1219245>] dump_stack+0x48/0x60 [ 0.863120] [<c105c084>] __schedule_bug+0x52/0x63 [ 0.863689] [<c17aedc2>] __schedule+0x5a/0x436 [ 0.864225] [<c1060ee7>] ? ___might_sleep+0xaa/0x197 [ 0.864834] [<c17af1b9>] preempt_schedule_common+0x1b/0x33 [ 0.865502] [<c17af2d6>] _cond_resched+0x15/0x1c [ 0.882163] [<c17af88a>] __wait_for_common+0x26/0x105 [ 0.882809] [<c17b2325>] ? _raw_spin_unlock_irqrestore+0x3f/0x4a [ 0.900558] [<c17b1d37>] ? console_conditional_schedule+0x24/0x24 [ 0.901448] [<c105e25d>] ? try_to_wake_up+0x192/0x19c [ 0.902201] [<c17afa10>] wait_for_completion_killable+0x17/0x2c [ 0.903058] [<c1058493>] kthread_create_on_node+0x9c/0x104 [ 0.903867] [<c10585a6>] kthread_create_on_cpu+0x14/0x44 [ 0.904632] [<c105a9f3>] ? cpumask_next+0x26/0x26 [ 0.905236] [<c105acbb>] __smpboot_create_thread+0x4e/0xb0 [ 0.905934] [<c105ae70>] smpboot_register_percpu_thread_cpumask+0x44/0xa1 [ 0.924920] [<c1d4cc3b>] ? cpu_hotplug_pm_sync_init+0x11/0x11 [ 0.925605] [<c1d4cc58>] spawn_ksoftirqd+0x1d/0x27 [ 0.926195] [<c1d39bcc>] do_one_initcall+0xd0/0x14e [ 0.926778] [<c10761f8>] ? vprintk_default+0x12/0x14 [ 0.927385] [<c10a640b>] ? printk+0x12/0x14 [ 0.927905] [<c100dbba>] ? print_cpu_info+0x8e/0xab [ 0.928496] [<c100dbd0>] ? print_cpu_info+0xa4/0xab [ 0.929084] [<c1d47377>] ? native_smp_prepare_cpus+0x223/0x25e [ 0.929794] [<c1d39ca7>] kernel_init_freeable+0x5d/0x172 [ 0.930424] [<c17aaaf8>] kernel_init+0x8/0xb5 [ 0.930960] [<c17b29c1>] ret_from_kernel_thread+0x21/0x30 [ 0.931600] [<c17aaaf0>] ? rest_init+0x116/0x116 [ 0.954388] BUG: scheduling while atomic: swapper/0/1/0x00200001 [ 0.955157] 2 locks held by swapper/0/1: [ 0.955650] #0: (cpu_hotplug.lock){.+.+.+}, at: [<c104408a>] get_online_cpus+0x27/0x62 [ 0.956723] #1: (smpboot_threads_lock){+.+.+.}, at: [<c105ae50>] smpboot_register_percpu_thread_cpumask+0x24/0xa1 [ 0.958173] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 4.3.0-rc3-00001-g8787dbe #364 [ 0.959432] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 0.960700] 00000000 00000000 d4463e58 c1219245 d4478000 d4463e64 c105c084 00000000 [ 0.985862] d4463e88 c17aedc2 c1060ee7 00000000 d4489f48 d4478000 d4464000 d4489f48 [ 0.986895] d445cc00 d4463e94 c17af1b9 7fffffff d4463e9c c17af2d6 d4463ed0 c17af88a [ 0.987927] Call Trace: [ 0.988233] [<c1219245>] dump_stack+0x48/0x60 [ 0.988756] [<c105c084>] __schedule_bug+0x52/0x63 [ 0.989331] [<c17aedc2>] __schedule+0x5a/0x436 [ 0.989877] [<c1060ee7>] ? ___might_sleep+0xaa/0x197 [ 0.990475] [<c17af1b9>] preempt_schedule_common+0x1b/0x33 [ 0.991126] [<c17af2d6>] _cond_resched+0x15/0x1c [ 0.991682] [<c17af88a>] __wait_for_common+0x26/0x105 [ 1.007929] [<c17b2325>] ? _raw_spin_unlock_irqrestore+0x3f/0x4a [ 1.008676] [<c17b1d37>] ? console_conditional_schedule+0x24/0x24 [ 1.009446] [<c105e25d>] ? try_to_wake_up+0x192/0x19c [ 1.010086] [<c17af97d>] wait_for_completion+0x14/0x17 [ 1.010742] [<c105858d>] kthread_park+0x3f/0x44 [ 1.011314] [<c10585cd>] kthread_create_on_cpu+0x3b/0x44 [ 1.011988] [<c105acbb>] __smpboot_create_thread+0x4e/0xb0 [ 1.012666] [<c105ae70>] smpboot_register_percpu_thread_cpumask+0x44/0xa1 [ 1.024690] [<c1d4cc3b>] ? cpu_hotplug_pm_sync_init+0x11/0x11 [ 1.025526] [<c1d4cc58>] spawn_ksoftirqd+0x1d/0x27 [ 1.030249] [<c1d39bcc>] do_one_initcall+0xd0/0x14e [ 1.030887] [<c10761f8>] ? vprintk_default+0x12/0x14 [ 1.031482] [<c10a640b>] ? printk+0x12/0x14 [ 1.031985] [<c100dbba>] ? print_cpu_info+0x8e/0xab [ 1.032563] [<c100dbd0>] ? print_cpu_info+0xa4/0xab [ 1.033145] [<c1d47377>] ? native_smp_prepare_cpus+0x223/0x25e [ 1.037969] [<c1d39ca7>] kernel_init_freeable+0x5d/0x172 [ 1.038750] [<c17aaaf8>] kernel_init+0x8/0xb5 [ 1.039413] [<c17b29c1>] ret_from_kernel_thread+0x21/0x30 [ 1.040200] [<c17aaaf0>] ? rest_init+0x116/0x116 [ 1.040913] BUG: scheduling while atomic: swapper/0/1/0x00200001 [ 1.043374] no locks held by swapper/0/1. [ 1.043893] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 4.3.0-rc3-00001-g8787dbe #364 [ 1.045035] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 1.050426] 00000000 00000000 d4463e8c c1219245 d4478000 d4463e98 c105c084 00000000 [ 1.051523] d4463ebc c17aedc2 c1060ee7 00000000 d4401c80 d4478000 d4464000 d4401c80 [ 1.052603] d4463f38 d4463ec8 c17af1b9 00000010 d4463ed0 c17af2d6 d4463ee0 c10cc3a7 [ 1.053818] Call Trace: [ 1.054170] [<c1219245>] dump_stack+0x48/0x60 [ 1.054805] [<c105c084>] __schedule_bug+0x52/0x63 [ 1.055475] [<c17aedc2>] __schedule+0x5a/0x436 [ 1.056121] [<c1060ee7>] ? ___might_sleep+0xaa/0x197 [ 1.056825] [<c17af1b9>] preempt_schedule_common+0x1b/0x33 [ 1.065690] [<c17af2d6>] _cond_resched+0x15/0x1c [ 1.066251] [<c10cc3a7>] slab_pre_alloc_hook+0x31/0x37 [ 1.066873] [<c10d0635>] __kmalloc_track_caller+0x4b/0xef [ 1.067506] [<c1223992>] ? kasprintf+0x11/0x13 [ 1.068049] [<c1223962>] kvasprintf+0x27/0x46 [ 1.068565] [<c1d4d167>] ? wq_sysfs_init+0x24/0x24 [ 1.069144] [<c1223992>] kasprintf+0x11/0x13 [ 1.073726] [<c1d39b1e>] do_one_initcall+0x22/0x14e [ 1.074316] [<c1d4d167>] ? wq_sysfs_init+0x24/0x24 [ 1.074902] [<c10761f8>] ? vprintk_default+0x12/0x14 [ 1.075491] [<c10a640b>] ? printk+0x12/0x14 [ 1.076007] [<c100dbba>] ? print_cpu_info+0x8e/0xab [ 1.076584] [<c100dbd0>] ? print_cpu_info+0xa4/0xab [ 1.077177] [<c1d47377>] ? native_smp_prepare_cpus+0x223/0x25e [ 1.081944] [<c1d39ca7>] kernel_init_freeable+0x5d/0x172 [ 1.082573] [<c17aaaf8>] kernel_init+0x8/0xb5 [ 1.083108] [<c17b29c1>] ret_from_kernel_thread+0x21/0x30 [ 1.083745] [<c17aaaf0>] ? rest_init+0x116/0x116 [ 1.084520] BUG: scheduling while atomic: swapper/0/1/0x00200001 [ 1.085269] no locks held by swapper/0/1. [ 1.089847] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 4.3.0-rc3-00001-g8787dbe #364 [ 1.090965] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 1.092228] 00000000 00000000 d4463ddc c1219245 d4478000 d4463de8 c105c084 00000000 [ 1.093489] d4463e0c c17aedc2 c1060ee7 00000000 d4463e6c d4478000 d4464000 d4463e6c [ 1.099534] d4463e98 d4463e18 c17af1b9 7fffffff d4463e20 c17af2d6 d4463e54 c17af88a [ 1.100544] Call Trace: [ 1.100851] [<c1219245>] dump_stack+0x48/0x60 [ 1.101364] [<c105c084>] __schedule_bug+0x52/0x63 [ 1.101925] [<c17aedc2>] __schedule+0x5a/0x436 [ 1.102445] [<c1060ee7>] ? ___might_sleep+0xaa/0x197 [ 1.111144] [<c17af1b9>] preempt_schedule_common+0x1b/0x33 [ 1.111945] [<c17af2d6>] _cond_resched+0x15/0x1c [ 1.112648] [<c17af88a>] __wait_for_common+0x26/0x105 [ 1.113399] [<c17b2325>] ? _raw_spin_unlock_irqrestore+0x3f/0x4a [ 1.114293] [<c17b1d37>] ? console_conditional_schedule+0x24/0x24 [ 1.130691] [<c105e25d>] ? try_to_wake_up+0x192/0x19c [ 1.131437] [<c17afa10>] wait_for_completion_killable+0x17/0x2c [ 1.132309] [<c1058493>] kthread_create_on_node+0x9c/0x104 [ 1.133104] [<c1053106>] create_worker+0xa5/0x121 [ 1.133803] [<c1053e2d>] ? process_scheduled_works+0x21/0x21 [ 1.134613] [<c12271e8>] ? find_next_bit+0xa/0xd [ 1.135314] [<c1d4d2d4>] init_workqueues+0x16d/0x303 [ 1.136045] [<c1d4d167>] ? wq_sysfs_init+0x24/0x24 [ 1.136758] [<c1d39bcc>] do_one_initcall+0xd0/0x14e [ 1.137477] [<c10761f8>] ? vprintk_default+0x12/0x14 [ 1.138234] [<c10a640b>] ? printk+0x12/0x14 [ 1.153892] [<c100dbba>] ? print_cpu_info+0x8e/0xab [ 1.154504] [<c100dbd0>] ? print_cpu_info+0xa4/0xab [ 1.155138] [<c1d47377>] ? native_smp_prepare_cpus+0x223/0x25e [ 1.155864] [<c1d39ca7>] kernel_init_freeable+0x5d/0x172 [ 1.156530] [<c17aaaf8>] kernel_init+0x8/0xb5 [ 1.157082] [<c17b29c1>] ret_from_kernel_thread+0x21/0x30 [ 1.157800] [<c17aaaf0>] ? rest_init+0x116/0x116 [ 1.158602] BUG: scheduling while atomic: swapper/0/1/0x00200001 [ 1.159485] no locks held by swapper/0/1. [ 1.160065] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 4.3.0-rc3-00001-g8787dbe #364 [ 1.183377] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 1.184642] 00000000 00000000 d4463e2c c1219245 d4478000 d4463e38 c105c084 00000000 [ 1.185886] d4463e5c c17aedc2 c1060ee7 00000000 d4406b40 d4478000 d4464000 d4406b40 [ 1.186968] d4e3f0c8 d4463e68 c17af1b9 00008010 d4463e70 c17af2d6 d4463e80 c10cc3a7 [ 1.188046] Call Trace: [ 1.188354] [<c1219245>] dump_stack+0x48/0x60 [ 1.188911] [<c105c084>] __schedule_bug+0x52/0x63 [ 1.189497] [<c17aedc2>] __schedule+0x5a/0x436 [ 1.212129] [<c1060ee7>] ? ___might_sleep+0xaa/0x197 [ 1.212757] [<c17af1b9>] preempt_schedule_common+0x1b/0x33 [ 1.213454] [<c17af2d6>] _cond_resched+0x15/0x1c [ 1.214114] [<c10cc3a7>] slab_pre_alloc_hook+0x31/0x37 [ 1.214862] [<c121a436>] ? ida_pre_get+0x2b/0x93 [ 1.215513] [<c10cef28>] kmem_cache_alloc+0x17/0xbb [ 1.216223] [<c121a436>] ? ida_pre_get+0x2b/0x93 [ 1.216882] [<c121a436>] ida_pre_get+0x2b/0x93 [ 1.217522] [<c121a709>] ida_simple_get+0x34/0x90 [ 1.218142] [<c1053083>] create_worker+0x22/0x121 [ 1.218712] [<c12271e8>] ? find_next_bit+0xa/0xd [ 1.250333] [<c1d4d2d4>] init_workqueues+0x16d/0x303 [ 1.250928] [<c1d4d167>] ? wq_sysfs_init+0x24/0x24 [ 1.251502] [<c1d39bcc>] do_one_initcall+0xd0/0x14e [ 1.252085] [<c10761f8>] ? vprintk_default+0x12/0x14 [ 1.252674] [<c10a640b>] ? printk+0x12/0x14 [ 1.253177] [<c100dbba>] ? print_cpu_info+0x8e/0xab [ 1.253753] [<c100dbd0>] ? print_cpu_info+0xa4/0xab [ 1.254332] [<c1d47377>] ? native_smp_prepare_cpus+0x223/0x25e [ 1.255026] [<c1d39ca7>] kernel_init_freeable+0x5d/0x172 [ 1.255649] [<c17aaaf8>] kernel_init+0x8/0xb5 [ 1.256178] [<c17b29c1>] ret_from_kernel_thread+0x21/0x30 [ 1.272053] [<c17aaaf0>] ? rest_init+0x116/0x116 [ 1.272701] BUG: scheduling while atomic: swapper/0/1/0x00200001 [ 1.273423] no locks held by swapper/0/1. [ 1.282074] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 4.3.0-rc3-00001-g8787dbe #364 [ 1.283264] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014 [ 1.284348] 00000000 00000000 d4463ddc c1219245 d4478000 d4463de8 c105c084 00000000 [ 1.285430] d4463e0c c17aedc2 c1060ee7 00000000 d4463e6c d4478000 d4464000 d4463e6c [ 1.305973] d4463e98 d4463e18 c17af1b9 7fffffff d4463e20 c17af2d6 d4463e54 c17af88a [ 1.307232] Call Trace: [ 1.307608] [<c1219245>] dump_stack+0x48/0x60 [ 1.308252] [<c105c084>] __schedule_bug+0x52/0x63 [ 1.308953] [<c17aedc2>] __schedule+0x5a/0x436 [ 1.309510] [<c1060ee7>] ? ___might_sleep+0xaa/0x197 [ 1.310140] [<c17af1b9>] preempt_schedule_common+0x1b/0x33 [ 1.313683] [<c17af2d6>] _cond_resched+0x15/0x1c [ 1.314271] [<c17af88a>] __wait_for_common+0x26/0x105 [ 1.325859] [<c17b2325>] ? _raw_spin_unlock_irqrestore+0x3f/0x4a [ 1.326568] [<c17b1d37>] ? console_conditional_schedule+0x24/0x24 [ 1.327298] [<c105e25d>] ? try_to_wake_up+0x192/0x19c [ 1.327915] [<c17afa10>] wait_for_completion_killable+0x17/0x2c [ 1.328611] [<c1058493>] kthread_create_on_node+0x9c/0x104 [ 1.329257] [<c1053106>] create_worker+0xa5/0x121 [ 1.329825] [<c1053e2d>] ? process_scheduled_works+0x21/0x21 [ 1.330485] [<c1227100>] ? __ctzsi2+0x3/0x9 Thanks, Fengguang Wu