$ ./x86_64-softmmu/qemu-system-x86_64 -m 512 -smp 2 -cpu host,+kvmclock,+x2apic -enable-kvm -kernel ~/src/linux/arch/x86/boot/bzImage /guests/f11-auto.qcow2 -append 'root=/dev/sda2 console=ttyS0 console=tty0' -snapshot -serial stdio Initializing cgroup subsys cpu Linux version 3.16.0+ (amit@grmbl.mre) (gcc version 4.8.3 20140624 (Red Hat 4.8.3-1) (GCC) ) #78 SMP PREEMPT Fri Aug 8 22:46:28 IST 2014 Command line: root=/dev/sda2 console=ttyS0 console=tty0 e820: BIOS-provided physical RAM map: BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved BIOS-e820: [mem 0x0000000000100000-0x000000001ffdffff] usable BIOS-e820: [mem 0x000000001ffe0000-0x000000001fffffff] reserved BIOS-e820: [mem 0x00000000feffc000-0x00000000feffffff] reserved BIOS-e820: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved NX (Execute Disable) protection: active SMBIOS 2.8 present. Hypervisor detected: KVM AGP: No AGP bridge found e820: last_pfn = 0x1ffe0 max_arch_pfn = 0x400000000 x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106 init_memory_mapping: [mem 0x00000000-0x000fffff] init_memory_mapping: [mem 0x1fc00000-0x1fdfffff] init_memory_mapping: [mem 0x1c000000-0x1fbfffff] init_memory_mapping: [mem 0x00100000-0x1bffffff] init_memory_mapping: [mem 0x1fe00000-0x1ffdffff] ACPI: Early table checksum verification disabled ACPI: RSDP 0x00000000000F0C50 000014 (v00 BOCHS ) ACPI: RSDT 0x000000001FFE18BD 000034 (v01 BOCHS BXPCRSDT 00000001 BXPC 00000001) ACPI: FACP 0x000000001FFE0B37 000074 (v01 BOCHS BXPCFACP 00000001 BXPC 00000001) ACPI: DSDT 0x000000001FFE0040 000AF7 (v01 BOCHS BXPCDSDT 00000001 BXPC 00000001) ACPI: FACS 0x000000001FFE0000 000040 ACPI: SSDT 0x000000001FFE0BAB 000C5A (v01 BOCHS BXPCSSDT 00000001 BXPC 00000001) ACPI: APIC 0x000000001FFE1805 000080 (v01 BOCHS BXPCAPIC 00000001 BXPC 00000001) ACPI: HPET 0x000000001FFE1885 000038 (v01 BOCHS BXPCHPET 00000001 BXPC 00000001) kvm-clock: Using msrs 4b564d01 and 4b564d00 kvm-clock: cpu 0, msr 0:1ffdf001, primary cpu clock Zone ranges: DMA [mem 0x00001000-0x00ffffff] DMA32 [mem 0x01000000-0xffffffff] Normal empty Movable zone start for each node Early memory node ranges node 0: [mem 0x00001000-0x0009efff] node 0: [mem 0x00100000-0x1ffdffff] ACPI: PM-Timer IO Port: 0x608 ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled) ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled) ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1]) ACPI: IOAPIC (id[0x00] address[0xfec00000] gsi_base[0]) IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23 ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level) ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level) Using ACPI (MADT) for SMP configuration information ACPI: HPET id: 0x8086a201 base: 0xfed00000 smpboot: Allowing 2 CPUs, 0 hotplug CPUs PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff] PM: Registered nosave memory: [mem 0x000a0000-0x000effff] PM: Registered nosave memory: [mem 0x000f0000-0x000fffff] e820: [mem 0x20000000-0xfeffbfff] available for PCI devices Booting paravirtualized kernel on KVM setup_percpu: NR_CPUS:4 nr_cpumask_bits:4 nr_cpu_ids:2 nr_node_ids:1 PERCPU: Embedded 475 pages/cpu @ffff88001f800000 s1915904 r8192 d21504 u2097152 KVM setup async PF for cpu 0 kvm-stealtime: cpu 0, msr 1f80cbc0 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 128873 Kernel command line: root=/dev/sda2 console=ttyS0 console=tty0 PID hash table entries: 2048 (order: 2, 16384 bytes) Dentry cache hash table entries: 65536 (order: 7, 524288 bytes) Inode-cache hash table entries: 32768 (order: 6, 262144 bytes) xsave: enabled xstate_bv 0x7, cntxt size 0x340 AGP: Checking aperture... AGP: No AGP bridge found Memory: 483812K/523768K available (4028K kernel code, 727K rwdata, 2184K rodata, 2872K init, 14172K bss, 39956K reserved) SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1 Preemptible hierarchical RCU implementation. RCU debugfs-based tracing is enabled. RCU lockdep checking is enabled. Additional per-CPU info printed with stalls. RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=2. Offload RCU callbacks from all CPUs Offload RCU callbacks from CPUs: 0-1. RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2 NO_HZ: Full dynticks CPUs: 1-3. NR_IRQS:4352 nr_irqs:512 16 Console: colour VGA+ 80x25 console [tty0] enabled console [ttyS0] enabled Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar ... MAX_LOCKDEP_SUBCLASSES: 8 ... MAX_LOCK_DEPTH: 48 ... MAX_LOCKDEP_KEYS: 8191 ... CLASSHASH_SIZE: 4096 ... MAX_LOCKDEP_ENTRIES: 32768 ... MAX_LOCKDEP_CHAINS: 65536 ... CHAINHASH_SIZE: 32768 memory used by lock dependency info: 8671 kB per task-struct memory footprint: 2688 bytes tsc: Detected 2790.934 MHz processor Calibrating delay loop (skipped) preset value.. 5581.86 BogoMIPS (lpj=11163736) pid_max: default: 32768 minimum: 301 ACPI: Core revision 20140724 ACPI: All ACPI Tables successfully acquired Mount-cache hash table entries: 1024 (order: 1, 8192 bytes) Mountpoint-cache hash table entries: 1024 (order: 1, 8192 bytes) Last level iTLB entries: 4KB 512, 2MB 8, 4MB 8 Last level dTLB entries: 4KB 512, 2MB 32, 4MB 32, 1GB 0 debug: unmapping init [mem 0xffffffff81b85000-0xffffffff81b87fff] ftrace: allocating 17856 entries in 70 pages ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1 smpboot: CPU0: Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz (fam: 06, model: 2a, stepping: 07) Performance Events: 16-deep LBR, SandyBridge events, Intel PMU driver. perf_event_intel: PEBS disabled due to CPU errata, please upgrade microcode ... version: 2 ... bit width: 48 ... generic registers: 4 ... value mask: 0000ffffffffffff ... max period: 000000007fffffff ... fixed-purpose events: 3 ... event mask: 000000070000000f KVM setup paravirtual spinlock x86: Booting SMP configuration: .... node #0, CPUs: #1 kvm-clock: cpu 1, msr 0:1ffdf041, secondary cpu clock x86: Booted up 1 node, 2 CPUs KVM setup async PF for cpu 1 kvm-stealtime: cpu 1, msr 1fa0cbc0 smpboot: Total of 2 processors activated (11163.73 BogoMIPS) prandom: seed boundary self test passed prandom: 100 self tests passed NET: Registered protocol family 16 cpuidle: using governor ladder cpuidle: using governor menu ACPI: bus type PCI registered acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 PCI: Using configuration type 1 for base access mtrr: your CPUs had inconsistent variable MTRR settings mtrr: your CPUs had inconsistent MTRRdefType settings mtrr: probably your BIOS does not setup all CPUs. mtrr: corrected configuration. ACPI: Added _OSI(Module Device) ACPI: Added _OSI(Processor Device) ACPI: Added _OSI(3.0 _SCP Extensions) ACPI: Added _OSI(Processor Aggregator Device) ACPI: Interpreter enabled ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S1_] (20140724/hwxface-580) ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S2_] (20140724/hwxface-580) ACPI: (supports S0 S3 S4 S5) ACPI: Using IOAPIC for interrupt routing PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff]) acpi PNP0A03:00: _OSC: OS supports [Segments MSI] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM acpiphp: Slot [3] registered acpiphp: Slot [4] registered acpiphp: Slot [5] registered acpiphp: Slot [6] registered acpiphp: Slot [7] registered acpiphp: Slot [8] registered acpiphp: Slot [9] registered acpiphp: Slot [10] registered acpiphp: Slot [11] registered acpiphp: Slot [12] registered acpiphp: Slot [13] registered acpiphp: Slot [14] registered acpiphp: Slot [15] registered acpiphp: Slot [16] registered acpiphp: Slot [17] registered acpiphp: Slot [18] registered acpiphp: Slot [19] registered acpiphp: Slot [20] registered acpiphp: Slot [21] registered acpiphp: Slot [22] registered acpiphp: Slot [23] registered acpiphp: Slot [24] registered acpiphp: Slot [25] registered acpiphp: Slot [26] registered acpiphp: Slot [27] registered acpiphp: Slot [28] registered acpiphp: Slot [29] registered acpiphp: Slot [30] registered acpiphp: Slot [31] registered PCI host bridge to bus 0000:00 pci_bus 0000:00: root bus resource [bus 00-ff] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7] pci_bus 0000:00: root bus resource [io 0x0d00-0xadff] pci_bus 0000:00: root bus resource [io 0xae0f-0xaeff] pci_bus 0000:00: root bus resource [io 0xaf20-0xafdf] pci_bus 0000:00: root bus resource [io 0xafe4-0xffff] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff] pci_bus 0000:00: root bus resource [mem 0x20000000-0xfebfffff] pci 0000:00:01.1: legacy IDE quirk: reg 0x10: [io 0x01f0-0x01f7] pci 0000:00:01.1: legacy IDE quirk: reg 0x14: [io 0x03f6] pci 0000:00:01.1: legacy IDE quirk: reg 0x18: [io 0x0170-0x0177] pci 0000:00:01.1: legacy IDE quirk: reg 0x1c: [io 0x0376] pci 0000:00:01.3: quirk: [io 0x0600-0x063f] claimed by PIIX4 ACPI pci 0000:00:01.3: quirk: [io 0x0700-0x070f] claimed by PIIX4 SMB ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11) ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11) ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11) ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11) ACPI: PCI Interrupt Link [LNKS] (IRQs *9) ACPI: Enabled 16 GPEs in block 00 to 0F vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none vgaarb: loaded vgaarb: bridge control possible 0000:00:02.0 SCSI subsystem initialized pps_core: LinuxPPS API ver. 1 registered pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti PTP clock support registered PCI: Using ACPI for IRQ routing HPET: 3 timers in total, 0 timers will be used for per-cpu timer Switched to clocksource kvm-clock pnp: PnP ACPI init pnp: PnP ACPI: found 6 devices NET: Registered protocol family 2 TCP established hash table entries: 4096 (order: 3, 32768 bytes) TCP bind hash table entries: 4096 (order: 6, 327680 bytes) TCP: Hash tables configured (established 4096 bind 4096) TCP: reno registered UDP hash table entries: 256 (order: 3, 49152 bytes) UDP-Lite hash table entries: 256 (order: 3, 49152 bytes) NET: Registered protocol family 1 pci 0000:00:00.0: Limiting direct PCI/PCI transfers pci 0000:00:01.0: PIIX3: Enabling Passive Release pci 0000:00:01.0: Activating ISA DMA hang workarounds rcu-torture:--- Start of test: nreaders=1 nfakewriters=4 stat_interval=60 verbose=1 test_no_idle_hz=1 shuffle_interval=3 stutter=5 irqreader=1 fqs_duration=0 fqs_holdoff=0 fqs_stutter=3 test_boost=1/0 test_boost_interval=7 test_boost_duration=4 shutdown_secs=0 stall_cpu=0 stall_cpu_holdoff=10 n_barrier_cbs=0 onoff_interval=0 onoff_holdoff=0 rcu-torture: Creating rcu_torture_writer task rcu-torture: Creating rcu_torture_fakewriter task rcu-torture: rcu_torture_writer task started rcu-torture: Creating rcu_torture_fakewriter task rcu-torture: rcu_torture_fakewriter task started rcu-torture: Creating rcu_torture_fakewriter task rcu-torture: rcu_torture_fakewriter task started rcu-torture: Creating rcu_torture_fakewriter task rcu-torture: rcu_torture_fakewriter task started rcu-torture: Creating rcu_torture_reader task rcu-torture: rcu_torture_fakewriter task started rcu-torture: Creating rcu_torture_stats task rcu-torture: rcu_torture_reader task started rcu-torture: Creating torture_shuffle task rcu-torture: rcu_torture_stats task started rcu-torture: Creating torture_stutter task rcu-torture: torture_shuffle task started rcu-torture: torture_stutter task started futex hash table entries: 512 (order: 4, 65536 bytes) audit: initializing netlink subsys (disabled) audit: type=2000 audit(1407518207.595:1): initialized HugeTLB registered 2 MB page size, pre-allocated 0 pages msgmni has been set to 944 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 47 at kernel/time/tick-sched.c:192 can_stop_full_tick+0xc0/0xcc() NO_HZ FULL will not work with unstable sched clock Modules linked in: CPU: 1 PID: 47 Comm: kworker/u4:1 Not tainted 3.16.0+ #78 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014 0000000000000000 0000000030a09456 ffff88001fa03ea0 ffffffff813e50b9 ffff88001fa03ee8 ffff88001fa03ed8 ffffffff81038ed4 ffffffff810a15e0 0000000000000000 0000000000000001 ffff88001f9d2e00 0000000000000000 Call Trace: [] dump_stack+0x4e/0x7a [] warn_slowpath_common+0x7f/0x98 [] ? can_stop_full_tick+0xc0/0xcc [] warn_slowpath_fmt+0x5c/0x73 [] can_stop_full_tick+0xc0/0xcc [] tick_nohz_irq_exit+0x68/0x84 [] irq_exit+0xc3/0xda [] smp_apic_timer_interrupt+0x35/0x41 [] apic_timer_interrupt+0x72/0x80 [] ? __lock_task_sighand+0xbf/0x114 [] ? arch_local_irq_restore+0x12/0x19 [] _raw_spin_unlock_irqrestore+0x4d/0x6d [] task_rq_unlock+0x22/0x27 [] wake_up_new_task+0xe4/0x14a [] do_fork+0x1be/0x30f [] ? _raw_spin_unlock_irq+0x2c/0x4f [] ? trace_hardirqs_on_caller+0x171/0x18d [] ? trace_hardirqs_on+0xd/0xf [] ? _raw_spin_unlock_irq+0x3b/0x4f [] kernel_thread+0x26/0x28 [] wait_for_helper+0x40/0x73 [] ? schedule_tail+0x30/0x76 [] ? __call_usermodehelper+0x80/0x80 [] ret_from_fork+0x7c/0xb0 [] ? __call_usermodehelper+0x80/0x80 ---[ end trace 71e38ccd169ffd84 ]--- Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252) io scheduler noop registered (default) pci_hotplug: PCI Hot Plug PCI Core version: 0.5 input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0 ACPI: Power Button [PWRF] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled 00:05: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A Non-volatile memory driver v1.3 Linux agpgart interface v0.103 brd: module loaded loop: module loaded scsi host0: ata_piix scsi host1: ata_piix ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc040 irq 14 ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc048 irq 15 libphy: Fixed MDIO Bus: probed e1000: Intel(R) PRO/1000 Network Driver - version 7.3.21-k8-NAPI e1000: Copyright (c) 1999-2006 Intel Corporation. ata2.00: ATAPI: QEMU DVD-ROM, 2.1.50, max UDMA/100 ata1.00: ATA-7: QEMU HARDDISK, 2.1.50, max UDMA/100 ata1.00: 10485760 sectors, multi 16: LBA48 ata2.00: configured for MWDMA2 ata1.00: configured for MWDMA2 scsi 0:0:0:0: Direct-Access ATA QEMU HARDDISK 50 PQ: 0 ANSI: 5 scsi 1:0:0:0: CD-ROM QEMU QEMU DVD-ROM 2.1. PQ: 0 ANSI: 5 sd 0:0:0:0: [sda] 10485760 512-byte logical blocks: (5.36 GB/5.00 GiB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sr 1:0:0:0: [sr0] scsi3-mmc drive: 4x/4x cd/rw xa/form2 tray cdrom: Uniform CD-ROM driver Revision: 3.20 sda: sda1 sda2 sd 0:0:0:0: [sda] Attached SCSI disk tsc: Refined TSC clocksource calibration: 2790.922 MHz ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 11 e1000 0000:00:03.0 eth0: (PCI:33MHz:32-bit) 52:54:00:12:34:56 e1000 0000:00:03.0 eth0: Intel(R) PRO/1000 Network Connection i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12 serio: i8042 KBD port at 0x60,0x64 irq 1 serio: i8042 AUX port at 0x60,0x64 irq 12 mousedev: PS/2 mouse device common for all mice input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input1 pps pps0: new PPS source ktimer pps pps0: ktimer PPS source registered pps_ldisc: PPS line discipline registered device-mapper: ioctl: 4.27.0-ioctl (2013-10-30) initialised: dm-devel@redhat.com TCP: cubic registered NET: Registered protocol family 17 kmemleak: Kernel memory leak detector initialized kmemleak: Automatic memory scanning thread started EXT4-fs (sda2): couldn't mount as ext3 due to feature incompatibilities EXT4-fs (sda2): couldn't mount as ext2 due to feature incompatibilities EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: (null) VFS: Mounted root (ext4 filesystem) readonly on device 8:2. debug: unmapping init [mem 0xffffffff818b7000-0xffffffff81b84fff] Write protecting the kernel read-only data: 8192k debug: unmapping init [mem 0xffff8800013f0000-0xffff8800013fffff] debug: unmapping init [mem 0xffff880001622000-0xffff8800017fffff] qemu: terminating on signal 2