[ 393.772067] INFO: rcu_sched detected stalls on CPUs/tasks: { 0 1} (detected by 2, t=5254 jiffies, g=803, c=802, q=92) [ 393.773890] Task dump for CPU 0: [ 393.774406] swapper/0 R running task 0 0 0 0x00000000 [ 393.775549] 0000000081574880 0000000100005b0c 000000cd42e4dffb 0000000000000000 [ 393.776056] 0000000000000004 0000000000000000 ffff88051fc0ea40 0000000000000096 [ 393.776056] ffffffff81800000 0000000000000000 ffffffff8101e7cc ffffffff81800000 [ 393.776056] Call Trace: [ 393.776056] [] ? default_idle+0x1c/0xb0 [ 393.776056] [] ? cpu_startup_entry+0x363/0x430 [ 393.776056] [] ? start_kernel+0x479/0x484 [ 393.776056] [] ? early_idt_handler_array+0x120/0x120 [ 393.776056] [] ? early_idt_handler_array+0x120/0x120 [ 393.776056] [] ? x86_64_start_kernel+0x148/0x157 [ 393.776056] Task dump for CPU 1: [ 393.776056] qemu-system-x86 R running task 0 880 864 0x00000000 [ 393.776056] 0000000000006c14 0000000000000000 0000000000000000 ffffffff81059e2e [ 393.776056] ffff880504653370 ffff880500000000 ffffffff81081c95 ffff88051fd17340 [ 393.776056] ffff880506a10040 ffff880503e48040 000000000000ae80 0000000000000000 [ 393.776056] Call Trace: [ 393.776056] [] ? kvm_clock_read+0x1e/0x30 [ 393.776056] [] ? __set_current_blocked+0x35/0x90 [ 393.776056] [] ? kvm_arch_vcpu_ioctl_run+0x286/0x1240 [kvm] [ 393.776056] [] ? pollwake+0x6a/0x70 [ 393.776056] [] ? kvm_arch_vcpu_load+0x4c/0x1f0 [kvm] [ 393.776056] [] ? kvm_vcpu_ioctl+0x322/0x5d0 [kvm] [ 393.776056] [] ? wake_up_state+0x20/0x20 [ 393.776056] [] ? do_vfs_ioctl+0x2e8/0x4f0 [ 393.776056] [] ? vfs_write+0x14c/0x1b0 [ 393.776056] [] ? SyS_ioctl+0x81/0xa0 [ 393.776056] [] ? system_call_fast_compare_end+0xc/0x6b [ 393.776056] rcu_sched kthread starved for 5254 jiffies! [ 456.792044] INFO: rcu_sched detected stalls on CPUs/tasks: { 1} (detected by 2, t=21009 jiffies, g=803, c=802, q=183) [ 456.793882] Task dump for CPU 1: [ 456.794432] qemu-system-x86 R running task 0 880 864 0x00000008 [ 456.795838] 0000000000006c14 0000000000000000 0000000000000000 ffffffff81059e2e [ 456.796034] ffff880504653370 ffff880500000000 ffffffff81081c95 ffff88051fd17340 [ 456.796034] ffff880506a10040 ffff880503e48040 000000000000ae80 0000000000000000 [ 456.796034] Call Trace: [ 456.796034] [] ? kvm_clock_read+0x1e/0x30 [ 456.796034] [] ? __set_current_blocked+0x35/0x90 [ 456.796034] [] ? kvm_arch_vcpu_ioctl_run+0x286/0x1240 [kvm] [ 456.796034] [] ? pollwake+0x6a/0x70 [ 456.796034] [] ? kvm_arch_vcpu_load+0x4c/0x1f0 [kvm] [ 456.796034] [] ? kvm_vcpu_ioctl+0x322/0x5d0 [kvm] [ 456.796034] [] ? wake_up_state+0x20/0x20 [ 456.796034] [] ? do_vfs_ioctl+0x2e8/0x4f0 [ 456.796034] [] ? vfs_write+0x14c/0x1b0 [ 456.796034] [] ? SyS_ioctl+0x81/0xa0 [ 456.796034] [] ? system_call_fast_compare_end+0xc/0x6b [ 519.812074] INFO: rcu_sched detected stalls on CPUs/tasks: { 1} (detected by 2, t=36764 jiffies, g=803, c=802, q=410) [ 519.814182] Task dump for CPU 1: [ 519.814789] qemu-system-x86 R running task 0 880 864 0x00000008 [ 519.816066] 0000000000006c14 0000000000000000 0000000000000000 ffffffff81059e2e [ 519.816066] ffff880504653370 ffff880500000000 ffffffff81081c95 ffff88051fd17340 [ 519.816066] ffff880506a10040 ffff880503e48040 000000000000ae80 0000000000000000 [ 519.816066] Call Trace: [ 519.816066] [] ? kvm_clock_read+0x1e/0x30 [ 519.816066] [] ? __set_current_blocked+0x35/0x90 [ 519.816066] [] ? kvm_arch_vcpu_ioctl_run+0x286/0x1240 [kvm] [ 519.816066] [] ? pollwake+0x6a/0x70 [ 519.816066] [] ? kvm_arch_vcpu_load+0x4c/0x1f0 [kvm] [ 519.816066] [] ? kvm_vcpu_ioctl+0x322/0x5d0 [kvm] [ 519.816066] [] ? wake_up_state+0x20/0x20 [ 519.816066] [] ? do_vfs_ioctl+0x2e8/0x4f0 [ 519.816066] [] ? vfs_write+0x14c/0x1b0 [ 519.816066] [] ? SyS_ioctl+0x81/0xa0 [ 519.816066] [] ? system_call_fast_compare_end+0xc/0x6b [ 582.832061] INFO: rcu_sched detected stalls on CPUs/tasks: { 1} (detected by 2, t=52519 jiffies, g=803, c=802, q=501) [ 582.834245] Task dump for CPU 1: [ 582.834852] qemu-system-x86 R running task 0 880 864 0x00000008 [ 582.836053] 0000000000006c14 0000000000000000 0000000000000000 ffffffff81059e2e [ 582.836053] ffff880504653370 ffff880500000000 ffffffff81081c95 ffff88051fd17340 [ 582.836053] ffff880506a10040 ffff880503e48040 000000000000ae80 0000000000000000 [ 582.836053] Call Trace: [ 582.836053] [] ? kvm_clock_read+0x1e/0x30 [ 582.836053] [] ? __set_current_blocked+0x35/0x90 [ 582.836053] [] ? kvm_arch_vcpu_ioctl_run+0x286/0x1240 [kvm] [ 582.836053] [] ? pollwake+0x6a/0x70 [ 582.836053] [] ? kvm_arch_vcpu_load+0x4c/0x1f0 [kvm] [ 582.836053] [] ? kvm_vcpu_ioctl+0x322/0x5d0 [kvm] [ 582.836053] [] ? wake_up_state+0x20/0x20 [ 582.836053] [] ? do_vfs_ioctl+0x2e8/0x4f0 [ 582.836053] [] ? vfs_write+0x14c/0x1b0 [ 582.836053] [] ? SyS_ioctl+0x81/0xa0 [ 582.836053] [] ? system_call_fast_compare_end+0xc/0x6b