early console in setup code [ 0.000000] Linux version 3.15.0-rc5-00087-gb739c99 (kbuild@roam) (gcc version 4.8.2 (Debian 4.8.2-18) ) #636 Fri May 30 03:36:46 CST 2014 [ 0.000000] KERNEL supported cpus: [ 0.000000] AMD AuthenticAMD [ 0.000000] NSC Geode by NSC [ 0.000000] Cyrix CyrixInstead [ 0.000000] Transmeta GenuineTMx86 [ 0.000000] Transmeta TransmetaCPU [ 0.000000] CPU: vendor_id 'GenuineIntel' unknown, using generic init. [ 0.000000] CPU: Your system may be unstable. [ 0.000000] e820: BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable [ 0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved [ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x0000000013ffdfff] usable [ 0.000000] BIOS-e820: [mem 0x0000000013ffe000-0x0000000013ffffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000feffc000-0x00000000feffffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved [ 0.000000] Notice: NX (Execute Disable) protection cannot be enabled: non-PAE kernel! [ 0.000000] Hypervisor detected: KVM [ 0.000000] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved [ 0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable [ 0.000000] e820: last_pfn = 0x13ffe max_arch_pfn = 0x100000 [ 0.000000] Scanning 1 areas for low memory corruption [ 0.000000] initial memory mapped: [mem 0x00000000-0x033fffff] [ 0.000000] Base memory trampoline at [8009b000] 9b000 size 16384 [ 0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff] [ 0.000000] [mem 0x00000000-0x000fffff] page 4k [ 0.000000] init_memory_mapping: [mem 0x12000000-0x123fffff] [ 0.000000] [mem 0x12000000-0x123fffff] page 4k [ 0.000000] BRK [0x02e1d000, 0x02e1dfff] PGTABLE [ 0.000000] init_memory_mapping: [mem 0x10000000-0x11ffffff] [ 0.000000] [mem 0x10000000-0x11ffffff] page 4k [ 0.000000] BRK [0x02e1e000, 0x02e1efff] PGTABLE [ 0.000000] BRK [0x02e1f000, 0x02e1ffff] PGTABLE [ 0.000000] BRK [0x02e20000, 0x02e20fff] PGTABLE [ 0.000000] BRK [0x02e21000, 0x02e21fff] PGTABLE [ 0.000000] BRK [0x02e22000, 0x02e22fff] PGTABLE [ 0.000000] init_memory_mapping: [mem 0x00100000-0x0fffffff] [ 0.000000] [mem 0x00100000-0x0fffffff] page 4k [ 0.000000] init_memory_mapping: [mem 0x12400000-0x13ffdfff] [ 0.000000] [mem 0x12400000-0x13ffdfff] page 4k [ 0.000000] RAMDISK: [mem 0x127ab000-0x13feffff] [ 0.000000] ACPI: RSDP 0x000FD950 000014 (v00 BOCHS ) [ 0.000000] ACPI: RSDT 0x13FFE450 000034 (v01 BOCHS BXPCRSDT 00000001 BXPC 00000001) [ 0.000000] ACPI: FACP 0x13FFFF80 000074 (v01 BOCHS BXPCFACP 00000001 BXPC 00000001) [ 0.000000] ACPI: DSDT 0x13FFE490 0011A9 (v01 BXPC BXDSDT 00000001 INTL 20100528) [ 0.000000] ACPI: FACS 0x13FFFF40 000040 [ 0.000000] ACPI: SSDT 0x13FFF7A0 000796 (v01 BOCHS BXPCSSDT 00000001 BXPC 00000001) [ 0.000000] ACPI: APIC 0x13FFF680 000080 (v01 BOCHS BXPCAPIC 00000001 BXPC 00000001) [ 0.000000] ACPI: HPET 0x13FFF640 000038 (v01 BOCHS BXPCHPET 00000001 BXPC 00000001) [ 0.000000] 0MB HIGHMEM available. [ 0.000000] 319MB LOWMEM available. [ 0.000000] mapped low ram: 0 - 13ffe000 [ 0.000000] low ram: 0 - 13ffe000 [ 0.000000] kvm-clock: Using msrs 4b564d01 and 4b564d00 [ 0.000000] kvm-clock: cpu 0, msr 0:13ffd001, primary cpu clock [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x00001000-0x00ffffff] [ 0.000000] Normal [mem 0x01000000-0x13ffdfff] [ 0.000000] HighMem empty [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x00001000-0x0009efff] [ 0.000000] node 0: [mem 0x00100000-0x13ffdfff] [ 0.000000] On node 0 totalpages: 81820 [ 0.000000] free_area_init_node: node 0, pgdat 8244f020, node_mem_map 924db024 [ 0.000000] DMA zone: 36 pages used for memmap [ 0.000000] DMA zone: 0 pages reserved [ 0.000000] DMA zone: 3998 pages, LIFO batch:0 [ 0.000000] Normal zone: 684 pages used for memmap [ 0.000000] Normal zone: 77822 pages, LIFO batch:15 [ 0.000000] ACPI: PM-Timer IO Port: 0xb008 [ 0.000000] ACPI: HPET id: 0x8086a201 base: 0xfed00000 [ 0.000000] KVM setup async PF for cpu 0 [ 0.000000] kvm-stealtime: cpu 0, msr 2137100 [ 0.000000] e820: [mem 0x14000000-0xfeffbfff] available for PCI devices [ 0.000000] Booting paravirtualized kernel on KVM [ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768 [ 0.000000] pcpu-alloc: [0] 0 [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 81100 [ 0.000000] Kernel command line: hung_task_panic=1 earlyprintk=ttyS0,115200 debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=10 softlockup_panic=1 nmi_watchdog=panic prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal root=/dev/ram0 rw link=/kbuild-tests/run-queue/kvm/i386-randconfig-r3-0530/linux-devel:devel-roam-i386-201405300201:b739c9982801e5f76097311b67dfd76891b10988:bisect-linux/.vmlinuz-b739c9982801e5f76097311b67dfd76891b10988-20140530033701-10-ivb43 branch=linux-devel/devel-roam-i386-201405300201 BOOT_IMAGE=/kernel/i386-randconfig-r3-0530/b739c9982801e5f76097311b67dfd76891b10988/vmlinuz-3.15.0-rc5-00087-gb739c99 drbd.minor_count=8 [ 0.000000] sysrq: sysrq always enabled. [ 0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes) [ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) [ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) [ 0.000000] Initializing CPU#0 [ 0.000000] Initializing HighMem for node 0 (00000000:00000000) [ 0.000000] Memory: 267904K/327280K available (12960K kernel code, 3282K rwdata, 4536K rodata, 636K init, 9320K bss, 59376K reserved, 0K highmem) [ 0.000000] virtual kernel memory layout: [ 0.000000] fixmap : 0xfffcf000 - 0xfffff000 ( 192 kB) [ 0.000000] pkmap : 0xff800000 - 0xffc00000 (4096 kB) [ 0.000000] vmalloc : 0x947fe000 - 0xff7fe000 (1712 MB) [ 0.000000] lowmem : 0x80000000 - 0x93ffe000 ( 319 MB) [ 0.000000] .init : 0x82457000 - 0x824f6000 ( 636 kB) [ 0.000000] .data : 0x81ca8672 - 0x82455a40 (7860 kB) [ 0.000000] .text : 0x81000000 - 0x81ca8672 (12961 kB) [ 0.000000] Checking if this processor honours the WP bit even in supervisor mode...Ok. [ 0.000000] NR_IRQS:16 nr_irqs:16 16 [ 0.000000] CPU 0 irqstacks, hard=91c02000 soft=91c04000 [ 0.000000] console [ttyS0] enabled [ 0.000000] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar [ 0.000000] ... MAX_LOCKDEP_SUBCLASSES: 8 [ 0.000000] ... MAX_LOCK_DEPTH: 48 [ 0.000000] ... MAX_LOCKDEP_KEYS: 8191 [ 0.000000] ... CLASSHASH_SIZE: 4096 [ 0.000000] ... MAX_LOCKDEP_ENTRIES: 16384 [ 0.000000] ... MAX_LOCKDEP_CHAINS: 32768 [ 0.000000] ... CHAINHASH_SIZE: 16384 [ 0.000000] memory used by lock dependency info: 3823 kB [ 0.000000] per task-struct memory footprint: 1920 bytes [ 0.000000] hpet clockevent registered [ 0.000000] tsc: Detected 2693.356 MHz processor [ 0.020000] Calibrating delay loop (skipped) preset value.. 5386.71 BogoMIPS (lpj=26933560) [ 0.020000] pid_max: default: 4096 minimum: 301 [ 0.020000] ACPI: Core revision 20140214 [ 0.021393] ACPI: All ACPI Tables successfully acquired [ 0.021846] ACPI: setting ELCR to 0200 (from 0c00) [ 0.022271] Security Framework initialized [ 0.022609] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes) [ 0.023125] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes) [ 0.024102] Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0 [ 0.024102] Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0, 1GB 0 [ 0.024102] tlb_flushall_shift: -1 [ 0.025217] CPU: GenuineIntel Common KVM processor (fam: 0f, model: 06, stepping: 01) [ 0.028609] Performance Events: no PMU driver, software events only. [ 0.029701] ftrace: Allocated trace_printk buffers [ 0.033780] devtmpfs: initialized [ 0.034347] gcov: version magic: 0x3430382a [ 0.036658] evm: security.capability [ 0.039560] prandom: seed boundary self test passed [ 0.040594] prandom: 100 self tests passed [ 0.040917] atomic64 test passed for i586+ platform with CX8 and with SSE [ 0.041437] pinctrl core: initialized pinctrl subsystem [ 0.042630] regulator-dummy: no parameters [ 0.043303] NET: Registered protocol family 16 [ 0.044756] cpuidle: using governor ladder [ 0.045086] cpuidle: using governor menu [ 0.046089] ACPI: bus type PCI registered [ 0.046462] PCI: Using configuration type 1 for base access [ 0.068027] ACPI: Added _OSI(Module Device) [ 0.068368] ACPI: Added _OSI(Processor Device) [ 0.068713] ACPI: Added _OSI(3.0 _SCP Extensions) [ 0.069088] ACPI: Added _OSI(Processor Aggregator Device) [ 0.083702] ACPI: Interpreter enabled [ 0.084027] ACPI: (supports S0 S5) [ 0.084298] ACPI: Using PIC for interrupt routing [ 0.084774] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug [ 0.103567] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff]) [ 0.104109] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments] [ 0.104678] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM [ 0.106336] PCI host bridge to bus 0000:00 [ 0.106667] pci_bus 0000:00: root bus resource [bus 00-ff] [ 0.107119] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7] [ 0.107629] pci_bus 0000:00: root bus resource [io 0x0d00-0xffff] [ 0.108131] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff] [ 0.108652] pci_bus 0000:00: root bus resource [mem 0x80000000-0xfebfffff] [ 0.109285] pci 0000:00:00.0: [8086:1237] type 00 class 0x060000 [ 0.110568] pci 0000:00:01.0: [8086:7000] type 00 class 0x060100 [ 0.111908] pci 0000:00:01.1: [8086:7010] type 00 class 0x010180 [ 0.114663] pci 0000:00:01.1: reg 0x20: [io 0xc040-0xc04f] [ 0.116010] pci 0000:00:01.1: legacy IDE quirk: reg 0x10: [io 0x01f0-0x01f7] [ 0.116560] pci 0000:00:01.1: legacy IDE quirk: reg 0x14: [io 0x03f6] [ 0.117077] pci 0000:00:01.1: legacy IDE quirk: reg 0x18: [io 0x0170-0x0177] [ 0.117645] pci 0000:00:01.1: legacy IDE quirk: reg 0x1c: [io 0x0376] [ 0.118841] pci 0000:00:01.3: [8086:7113] type 00 class 0x068000 [ 0.119605] pci 0000:00:01.3: quirk: [io 0xb000-0xb03f] claimed by PIIX4 ACPI [ 0.120020] pci 0000:00:01.3: quirk: [io 0xb100-0xb10f] claimed by PIIX4 SMB [ 0.121226] pci 0000:00:02.0: [1013:00b8] type 00 class 0x030000 [ 0.123766] pci 0000:00:02.0: reg 0x10: [mem 0xfc000000-0xfdffffff pref] [ 0.125475] pci 0000:00:02.0: reg 0x14: [mem 0xfebf0000-0xfebf0fff] [ 0.131752] pci 0000:00:02.0: reg 0x30: [mem 0xfebe0000-0xfebeffff pref] [ 0.133156] pci 0000:00:03.0: [8086:100e] type 00 class 0x020000 [ 0.134488] pci 0000:00:03.0: reg 0x10: [mem 0xfeba0000-0xfebbffff] [ 0.135828] pci 0000:00:03.0: reg 0x14: [io 0xc000-0xc03f] [ 0.140877] pci 0000:00:03.0: reg 0x30: [mem 0xfebc0000-0xfebdffff pref] [ 0.142263] pci 0000:00:04.0: [8086:25ab] type 00 class 0x088000 [ 0.143194] pci 0000:00:04.0: reg 0x10: [mem 0xfebf1000-0xfebf100f] [ 0.146946] pci_bus 0000:00: on NUMA node 0 [ 0.149535] ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11) [ 0.150850] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11) [ 0.152197] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11) [ 0.153470] ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11) [ 0.154271] ACPI: PCI Interrupt Link [LNKS] (IRQs *9) [ 0.156622] ACPI: Enabled 16 GPEs in block 00 to 0F [ 0.160318] media: Linux media interface: v0.10 [ 0.160727] Linux video capture interface: v2.00 [ 0.161243] pps_core: LinuxPPS API ver. 1 registered [ 0.161646] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti [ 0.162731] PCI: Using ACPI for IRQ routing [ 0.163097] PCI: pci_cache_line_size set to 64 bytes [ 0.163569] e820: reserve RAM buffer [mem 0x0009fc00-0x0009ffff] [ 0.164042] e820: reserve RAM buffer [mem 0x13ffe000-0x13ffffff] [ 0.166354] Switched to clocksource kvm-clock [ 0.225624] FS-Cache: Loaded [ 0.225974] pnp: PnP ACPI init [ 0.226256] ACPI: bus type PNP registered [ 0.226914] pnp 00:00: Plug and Play ACPI device, IDs PNP0b00 (active) [ 0.227610] pnp 00:01: Plug and Play ACPI device, IDs PNP0303 (active) [ 0.228279] pnp 00:02: Plug and Play ACPI device, IDs PNP0f13 (active) [ 0.228972] pnp 00:03: [dma 2] [ 0.229347] pnp 00:03: Plug and Play ACPI device, IDs PNP0700 (active) [ 0.230224] pnp 00:04: Plug and Play ACPI device, IDs PNP0400 (active) [ 0.231039] pnp 00:05: Plug and Play ACPI device, IDs PNP0501 (active) [ 0.231831] pnp 00:06: Plug and Play ACPI device, IDs PNP0501 (active) [ 0.233093] pnp 00:07: Plug and Play ACPI device, IDs PNP0103 (active) [ 0.234054] pnp: PnP ACPI: found 8 devices [ 0.234366] ACPI: bus type PNP unregistered [ 0.271734] pci_bus 0000:00: resource 4 [io 0x0000-0x0cf7] [ 0.272196] pci_bus 0000:00: resource 5 [io 0x0d00-0xffff] [ 0.272657] pci_bus 0000:00: resource 6 [mem 0x000a0000-0x000bffff] [ 0.273162] pci_bus 0000:00: resource 7 [mem 0x80000000-0xfebfffff] [ 0.273678] NET: Registered protocol family 1 [ 0.274040] pci 0000:00:00.0: Limiting direct PCI/PCI transfers [ 0.274552] pci 0000:00:01.0: PIIX3: Enabling Passive Release [ 0.275016] pci 0000:00:01.0: Activating ISA DMA hang workarounds [ 0.275559] pci 0000:00:02.0: Boot video device [ 0.275953] PCI: CLS 0 bytes, default 64 [ 0.276674] Unpacking initramfs... [ 1.410818] debug: unmapping init [mem 0x927ab000-0x93feffff] [ 1.412621] microcode: no support for this CPU vendor [ 1.413676] Scanning for low memory corruption every 60 seconds [ 1.415512] PCLMULQDQ-NI instructions are not detected. [ 1.416104] spin_lock-torture:--- Start of test: nwriters_stress=2 stat_interval=60 verbose=1 shuffle_interval=3 stutter=5 shutdown_secs=0 onoff_interval=0 onoff_holdoff=0 [ 1.417321] spin_lock-torture: Creating torture_shuffle task [ 1.418026] spin_lock-torture: Creating torture_stutter task [ 1.418508] spin_lock-torture: torture_shuffle task started [ 1.418967] spin_lock-torture: Creating lock_torture_writer task [ 1.419493] spin_lock-torture: torture_stutter task started [ 1.419941] spin_lock-torture: Creating lock_torture_writer task [ 1.420515] spin_lock-torture: lock_torture_writer task started [ 1.420993] spin_lock-torture: Creating lock_torture_stats task [ 1.421519] spin_lock-torture: lock_torture_writer task started [ 1.422657] futex hash table entries: 16 (order: -3, 832 bytes) [ 1.923788] spin_lock-torture: lock_torture_stats task started [ 1.949322] HugeTLB registered 4 MB page size, pre-allocated 0 pages [ 1.949915] VFS: Disk quotas dquot_6.5.2 [ 1.950334] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) [ 1.952660] ROMFS MTD (C) 2007 Red Hat, Inc. [ 1.953114] msgmni has been set to 523 [ 1.956782] Key type asymmetric registered [ 1.957117] Asymmetric key parser 'x509' registered [ 1.957484] test_string_helpers: Running tests... [ 1.974997] crc32: CRC_LE_BITS = 1, CRC_BE BITS = 1 [ 1.975415] crc32: self tests passed, processed 225944 bytes in 8474709 nsec [ 1.984252] crc32c: CRC_LE_BITS = 1 [ 1.984569] crc32c: self tests passed, processed 225944 bytes in 4164202 nsec [ 2.410240] tsc: Refined TSC clocksource calibration: 2693.540 MHz [ 2.550326] crc32_combine: 8373 self tests passed [ 3.116509] crc32c_combine: 8373 self tests passed [ 3.117347] xz_dec_test: module loaded [ 3.117653] xz_dec_test: Create a device node with 'mknod xz_dec_test c 251 0' and write .xz files to it. [ 3.118399] rbtree testing -> 9818 cycles [ 3.529150] augmented rbtree testing -> 14704 cycles [ 4.136536] pci_hotplug: PCI Hot Plug PCI Core version: 0.5 [ 4.137152] pciehp: PCI Express Hot Plug Controller Driver version: 0.4 [ 4.137674] cpcihp_zt5550: ZT5550 CompactPCI Hot Plug Driver version: 0.2 [ 4.138239] cpcihp_generic: Generic port I/O CompactPCI Hot Plug Driver version: 0.1 [ 4.138848] cpcihp_generic: not configured, disabling. [ 4.139300] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4 [ 4.140719] rivafb_setup START [ 4.141174] VIA Graphics Integration Chipset framebuffer 2.4 initializing [ 4.143069] ipmi message handler version 39.2 [ 4.143459] IPMI System Interface driver. [ 4.143902] ipmi_si: Adding default-specified kcs state machine [ 4.144379] ipmi_si: Trying default-specified kcs state machine at i/o address 0xca2, slave address 0x0, irq 0 [ 4.145163] ipmi_si: Interface detection failed [ 4.145619] ipmi_si: Adding default-specified smic state machine [ 4.146112] ipmi_si: Trying default-specified smic state machine at i/o address 0xca9, slave address 0x0, irq 0 [ 4.147074] ipmi_si: Interface detection failed [ 4.147442] ipmi_si: Adding default-specified bt state machine [ 4.147914] ipmi_si: Trying default-specified bt state machine at i/o address 0xe4, slave address 0x0, irq 0 [ 4.148800] ipmi_si: Interface detection failed [ 4.149299] ipmi_si: Unable to find any System Interface(s) [ 4.149784] IPMI Watchdog: driver initialized [ 4.152011] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0 [ 4.152607] ACPI: Power Button [PWRF] [ 4.154083] GHES: HEST is not enabled! [ 4.291448] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 4.317191] 00:05: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A [ 4.319720] Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $ [ 4.320340] ac.o: No PCI boards found. [ 4.320635] ac.o: For an ISA board you must supply memory and irq parameters. [ 4.321419] Non-volatile memory driver v1.3 [ 4.321763] toshiba: not a supported Toshiba laptop [ 4.322330] Linux agpgart interface v0.103 [ 4.323596] Hangcheck: starting hangcheck timer 0.9.1 (tick is 180 seconds, margin is 60 seconds). [ 4.324288] Hangcheck: Using getrawmonotonic(). [ 4.324939] [drm] Initialized drm 1.1.0 20060810 [ 4.325517] [drm] radeon kernel modesetting enabled. [ 4.328364] [TTM] Zone kernel: Available graphics memory: 133952 kiB [ 4.328875] [TTM] Initializing pool allocator [ 4.329713] [ 4.329843] ============================================= [ 4.330272] [ INFO: possible recursive locking detected ] [ 4.330294] 3.15.0-rc5-00087-gb739c99 #636 Not tainted [ 4.330294] --------------------------------------------- [ 4.330294] swapper/1 is trying to acquire lock: [ 4.330294] (&dev->mode_config.mutex){+.+.+.}, at: [<8158fa28>] drm_modeset_lock_all+0x28/0xa0 [ 4.330294] [ 4.330294] but task is already holding lock: [ 4.330294] (&dev->mode_config.mutex){+.+.+.}, at: [<8157720e>] drm_fb_helper_initial_config+0x6e/0x890 [ 4.330294] [ 4.330294] other info that might help us debug this: [ 4.330294] Possible unsafe locking scenario: [ 4.330294] [ 4.330294] CPU0 [ 4.330294] ---- [ 4.330294] lock(&dev->mode_config.mutex); [ 4.330294] lock(&dev->mode_config.mutex); [ 4.330294] [ 4.330294] *** DEADLOCK *** [ 4.330294] [ 4.330294] May be due to missing lock nesting notation [ 4.330294] [ 4.330294] 4 locks held by swapper/1: [ 4.330294] #0: (&dev->mutex){......}, at: [<81770e9c>] __driver_attach+0x7c/0x140 [ 4.330294] #1: (&dev->mutex){......}, at: [<81770eb6>] __driver_attach+0x96/0x140 [ 4.330294] #2: (drm_global_mutex){+.+.+.}, at: [<81587f89>] drm_dev_register+0x29/0x210 [ 4.330294] #3: (&dev->mode_config.mutex){+.+.+.}, at: [<8157720e>] drm_fb_helper_initial_config+0x6e/0x890 [ 4.330294] [ 4.330294] stack backtrace: [ 4.330294] CPU: 0 PID: 1 Comm: swapper Not tainted 3.15.0-rc5-00087-gb739c99 #636 [ 4.330294] 82772bd0 91c25b70 81c8091f 91c25bf0 810a75e6 82031095 91c1922c 00000001 [ 4.330294] e891fd4b 00000004 91c19478 82772bd0 00000000 91c19000 91c19478 8274ddb8 [ 4.330294] 82543d00 91c25bcc 0000073c 00000000 00000000 00000000 00000001 91c19478 [ 4.330294] Call Trace: [ 4.330294] [<81c8091f>] dump_stack+0x40/0x5e [ 4.330294] [<810a75e6>] validate_chain.isra.25+0xe66/0x1f70 [ 4.330294] [<8109a413>] ? sched_clock_cpu+0x153/0x1c0 [ 4.330294] [<810ae42e>] __lock_acquire+0x149e/0x1780 [ 4.330294] [<810ae42e>] ? __lock_acquire+0x149e/0x1780 [ 4.330294] [<810ae865>] lock_acquire+0x155/0x1d0 [ 4.330294] [<8158fa28>] ? drm_modeset_lock_all+0x28/0xa0 [ 4.330294] [<81c9f2a9>] mutex_lock_nested+0x99/0x6a0 [ 4.330294] [<8158fa28>] ? drm_modeset_lock_all+0x28/0xa0 [ 4.330294] [<8158fa28>] ? drm_modeset_lock_all+0x28/0xa0 [ 4.330294] [<8157720e>] ? drm_fb_helper_initial_config+0x6e/0x890 [ 4.330294] [<8157720e>] ? drm_fb_helper_initial_config+0x6e/0x890 [ 4.330294] [<8158fa28>] drm_modeset_lock_all+0x28/0xa0 [ 4.330294] [<81577223>] drm_fb_helper_initial_config+0x83/0x890 [ 4.330294] [<810a97b2>] ? trace_hardirqs_on_caller+0x2d2/0x420 [ 4.330294] [<810a9927>] ? trace_hardirqs_on+0x27/0x40 [ 4.330294] [<8158fa78>] ? drm_modeset_lock_all+0x78/0xa0 [ 4.330294] [<8156f4fe>] ? drm_helper_encoder_in_use+0xe/0x130 [ 4.330294] [<8158fad9>] ? drm_modeset_unlock_all+0x39/0x80 [ 4.330294] [<8174a06c>] cirrus_fbdev_init+0x10c/0x130 [ 4.330294] [<8174917b>] cirrus_modeset_init+0x27b/0x340 [ 4.330294] [<81747483>] cirrus_driver_load+0x113/0x1d0 [ 4.330294] [<81588047>] drm_dev_register+0xe7/0x210 [ 4.330294] [<8158ba80>] drm_get_pci_dev+0x200/0x340 [ 4.330294] [<8118a93d>] ? slob_free+0x5dd/0x610 [ 4.330294] [<81749416>] cirrus_pci_probe+0x126/0x160 [ 4.330294] [<81338b7a>] pci_device_probe+0xda/0x1f0 [ 4.330294] [<8120eef5>] ? sysfs_create_link+0x25/0x40 [ 4.330294] [<81770b9f>] really_probe+0x16f/0x3f0 [ 4.330294] [<81770ef9>] __driver_attach+0xd9/0x140 [ 4.330294] [<81770e20>] ? really_probe+0x3f0/0x3f0 [ 4.330294] [<8176d932>] bus_for_each_dev+0xb2/0x140 [ 4.330294] [<817705cc>] driver_attach+0x2c/0x40 [ 4.330294] [<81770e20>] ? really_probe+0x3f0/0x3f0 [ 4.330294] [<8176ead9>] bus_add_driver+0x129/0x3e0 [ 4.330294] [<81771855>] driver_register+0x165/0x1f0 [ 4.330294] [<8249f39c>] ? mgag200_init+0x4f/0x4f [ 4.330294] [<81338cf6>] __pci_register_driver+0x66/0x80 [ 4.330294] [<8158bc4b>] drm_pci_init+0x8b/0x1b0 [ 4.330294] [<8249f39c>] ? mgag200_init+0x4f/0x4f [ 4.330294] [<8249f3d3>] cirrus_init+0x37/0x4f [ 4.330294] [<82458598>] do_one_initcall+0xf4/0x21e [ 4.330294] [<81080016>] ? parameq+0x26/0x110 [ 4.330294] [<812dd939>] ? strlen+0x9/0x40 [ 4.330294] [<82457735>] ? repair_env_string+0x32/0xd3 [ 4.330294] [<81080522>] ? parse_args+0x422/0x610 [ 4.330294] [<824588ca>] kernel_init_freeable+0x208/0x38b [ 4.330294] [<82457703>] ? do_early_param+0x12b/0x12b [ 4.330294] [<81c77fee>] kernel_init+0x1e/0x220 [ 4.330294] [<81094e0f>] ? schedule_tail+0x1f/0xa0 [ 4.330294] [<81ca7700>] ret_from_kernel_thread+0x20/0x30 [ 4.330294] [<81c77fd0>] ? rest_init+0x180/0x180 [ 61.921707] spin_lock-torture: Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 82.580118] random: nonblocking pool is initialized [ 121.920851] spin_lock-torture: Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 181.921621] spin_lock-torture: Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 241.925890] spin_lock-torture: Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 301.920225] spin_lock-torture: Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 361.920189] spin_lock-torture: Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 421.920171] spin_lock-torture: Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 481.920169] spin_lock-torture: Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 541.924232] spin_lock-torture: Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 601.921669] spin_lock-torture: Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 661.924925] spin_lock-torture: Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 721.920136] spin_lock-torture: Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 781.920169] spin_lock-torture: Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 841.920185] spin_lock-torture: Writes: Total: 2 Max/Min: 0/0 Fail: 0 [ 901.920149] spin_lock-torture: Writes: Total: 2 Max/Min: 0/0 Fail: 0 BUG: kernel boot hang Elapsed time: 905 qemu-system-x86_64 -cpu kvm64 -enable-kvm -kernel /kernel/i386-randconfig-r3-0530/b739c9982801e5f76097311b67dfd76891b10988/vmlinuz-3.15.0-rc5-00087-gb739c99 -append 'hung_task_panic=1 earlyprintk=ttyS0,115200 debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=10 softlockup_panic=1 nmi_watchdog=panic prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal root=/dev/ram0 rw link=/kbuild-tests/run-queue/kvm/i386-randconfig-r3-0530/linux-devel:devel-roam-i386-201405300201:b739c9982801e5f76097311b67dfd76891b10988:bisect-linux/.vmlinuz-b739c9982801e5f76097311b67dfd76891b10988-20140530033701-10-ivb43 branch=linux-devel/devel-roam-i386-201405300201 BOOT_IMAGE=/kernel/i386-randconfig-r3-0530/b739c9982801e5f76097311b67dfd76891b10988/vmlinuz-3.15.0-rc5-00087-gb739c99 drbd.minor_count=8' -initrd /kernel-tests/initrd/quantal-core-i386.cgz -m 320 -smp 2 -net nic,vlan=1,model=e1000 -net user,vlan=1 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -pidfile /dev/shm/kboot/pid-quantal-ivb43-67 -serial file:/dev/shm/kboot/serial-quantal-ivb43-67 -daemonize -display none -monitor null