[ 146.402633] perf interrupt took too long (2513 > 2500), lowering kernel.perf_event_max_sample_rate to 50000 [ 172.547872] perf interrupt took too long (5062 > 5000), lowering kernel.perf_event_max_sample_rate to 25000 [ 326.310168] perf interrupt took too long (10039 > 10000), lowering kernel.perf_event_max_sample_rate to 12500 [ 400.549663] kvm: zapping shadow pages for mmio generation wraparound [ 407.185883] ------------[ cut here ]------------ [ 407.185883] WARNING: CPU: 0 PID: 1027 at /build/linux-oP9w_T/linux-3.16.7-ckt9/kernel/watchdog.c:265 watchdog_overflow_callback+0x98/0xc0() [ 407.185883] Watchdog detected hard LOCKUP on cpu 0 [ 407.185883] Modules linked in: [ 407.185883] nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache sunrpc virtio_balloon kvm_intel kvm crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 i2c_piix4 lrw joydev ppdev gf128mul ttm glue_helper drm_kms_helper ablk_helper drm cryptd i2c_core psmouse evdev serio_raw pcspkr parport_pc parport processor thermal_sys button loop fuse autofs4 hid_generic usbhid hid ext4 crc16 mbcache jbd2 btrfs xor raid6_pq dm_mod md_mod ata_generic virtio_blk virtio_net crct10dif_pclmul crct10dif_common crc32c_intel uhci_hcd ehci_hcd ata_piix libata usbcore scsi_mod usb_common floppy virtio_pci virtio_ring virtio [ 407.185883] CPU: 0 PID: 1027 Comm: qemu-system-x86 Not tainted 3.16.0-4-amd64 #1 Debian 3.16.7-ckt9-2 [ 407.185883] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007 [ 407.185883] 0000000000000009 ffffffff8150ac86 ffff88051fc05ca8 ffffffff81067747 [ 407.185883] ffff88050a1bf400 ffff88051fc05cf8 ffff88051fc05d98 0000000000000000 [ 407.185883] ffff88051fc05ef8 ffffffff810677ac ffffffff8171c7a0 0000000000000020 [ 407.185883] Call Trace: [ 407.185883] [] ? dump_stack+0x41/0x51 [ 407.185883] [] ? warn_slowpath_common+0x77/0x90 [ 407.185883] [] ? warn_slowpath_fmt+0x4c/0x50 [ 407.185883] [] ? watchdog_overflow_callback+0x98/0xc0 [ 407.185883] [] ? __perf_event_overflow+0x87/0x220 [ 407.185883] [] ? intel_pmu_handle_irq+0x1ea/0x3d0 [ 407.185883] [] ? perf_event_nmi_handler+0x26/0x40 [ 407.185883] [] ? nmi_handle+0x8d/0x120 [ 407.185883] [] ? default_do_nmi+0xbd/0x110 [ 407.185883] [] ? do_nmi+0x88/0xc0 [ 407.185883] [] ? end_repeat_nmi+0x1e/0x2e [ 407.185883] [] ? vmx_vcpu_run+0x5e7/0x1c6f [kvm_intel] [ 407.185883] [] ? vmx_vcpu_run+0x5e7/0x1c6f [kvm_intel] [ 407.185883] [] ? vmx_vcpu_run+0x5e7/0x1c6f [kvm_intel] [ 407.185883] <> [] ? kvm_arch_vcpu_ioctl_run+0xb17/0x1110 [kvm] [ 407.185883] [] ? try_to_wake_up+0xd3/0x2d0 [ 407.185883] [] ? kvm_arch_vcpu_load+0x46/0x1d0 [kvm] [ 407.185883] [] ? kvm_vcpu_ioctl+0x2f1/0x590 [kvm] [ 407.185883] [] ? fsnotify+0x23c/0x300 [ 407.185883] [] ? do_vfs_ioctl+0x2cf/0x4b0 [ 407.185883] [] ? vfs_write+0x154/0x1f0 [ 407.185883] [] ? SyS_ioctl+0x81/0xa0 [ 407.185883] [] ? system_call_fast_compare_end+0x10/0x15 [ 407.185883] ---[ end trace f7613a26cf18de55 ]---