[PATCH] x86/mce: Keep quiet in case of broadcasted mce after system panic

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On 01/23/2017 at 10:50 PM, Borislav Petkov wrote:
> On Mon, Jan 23, 2017 at 09:35:53PM +0800, Xunlei Pang wrote:
>> One possible timing sequence would be:
>> 1st kernel running on multiple cpus panicked
>> then the crash dump code starts
>> the crash dump code stops the others cpus except the crashing one
>> 2nd kernel boots up on the crash cpu with "nr_cpus=1"
>> some broadcasted mce comes on some cpu amongst the other cpus(not the crashing cpu)
> Where does this broadcasted MCE come from?
>
> The crash dump code triggered it? Or it happened before the panic()?
>
> Are you talking about an *actual* sequence which you're experiencing on
> real hw or is this something hypothetical?
>

It occurred on real hardware when testing crash dump.

1) SysRq-c was injected for the test in 1st kernel
[ 49.897279] SysRq : Trigger a crash 2) The 2nd kernel started for kdump
   [ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-3.10.0-229.el7.x86_64 root=UUID=976a15c8-8cbe-44ad-bb91-23f9b18e8789 ro console=ttyS1,115200 nmi_watchdog=0 irqpoll nr_cpus=1 reset_devices cgroup_disable=memory mce=off numa=off udev.children-max=2 panic=10 rootflags=nofail acpi_no_memhotplug disable_cpu_apicid=0 elfcorehdr=869772K 3) An MCE came to the 1st kernel, timeout panic occurred, and rebooted the machine
    [    6.095706] Dazed and confused, but trying to continue  // message of the 1st kernel
    [   81.655507] Kernel panic - not syncing: Timeout synchronizing machine check over CPUs
    [   82.729324] Shutting down cpus with NMI
    [   82.774539] drm_kms_helper: panic occurred, switching back to text console
    [   82.782257] Rebooting in 10 seconds..

Please see the attached for the full log. Regards, Xunlei

-------------- next part --------------
[   49.897279] SysRq : Trigger a crash 
[   49.901218] BUG: unable to handle kernel NULL pointer dereference at           (null) 
[   49.909988] IP: [<ffffffff81397486>] sysrq_handle_crash+0x16/0x20 
[   49.916805] PGD 868add067 PUD 867139067 PMD 0  
[   49.921805] Oops: 0002 [#1] SMP  
[   49.925432] Modules linked in: ipmi_devintf intel_powerclamp coretemp intel_rapl kvm_intel kvm crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd iTCO_wdt sb_edac iTCO_vendor_support ntb mei_me pcspkr edac_core ioatdma lpc_ich i2c_i801 ipmi_si mei mfd_core shpchp dca ipmi_msghandler acpi_pad acpi_power_meter xfs sd_mod sr_mod crc_t10dif cdrom crct10dif_common usb_storage mgag200 syscopyarea sysfillrect sysimgblt i2c_algo_bit drm_kms_helper ata_generic ttm bnx2x pata_acpi mdio drm ata_piix ptp libata i2c_core pps_core libcrc32c 
[   49.984994] CPU: 9 PID: 9463 Comm: do-test.sh Not tainted 3.10.0-229.el7.x86_64 #1 
[   49.993456] Hardware name: NEC Express5800/B120d-h [N8400-126Y]/G7LDV, BIOS 4.6.2013 10/24/2012 
[   50.003164] task: ffff880433700000 ti: ffff8808653b8000 task.ti: ffff8808653b8000 
[   50.011514] RIP: 0010:[<ffffffff81397486>]  [<ffffffff81397486>] sysrq_handle_crash+0x16/0x20 
[   50.021045] RSP: 0018:ffff8808653bbe80  EFLAGS: 00010046 
[   50.026976] RAX: 000000000000000f RBX: ffffffff819c18a0 RCX: 0000000000000000 
[   50.034939] RDX: 0000000000000000 RSI: ffff88087fc2d488 RDI: 0000000000000063 
[   50.042908] RBP: ffff8808653bbe80 R08: 0000000000000092 R09: 0000000000000608 
[   50.050870] R10: 0000000000000607 R11: 0000000000000003 R12: 0000000000000063 
[   50.058837] R13: 0000000000000246 R14: 0000000000000007 R15: 0000000000000000 
[   50.066799] FS:  00007f0faaf54740(0000) GS:ffff88087fc20000(0000) knlGS:0000000000000000 
[   50.075828] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 
[   50.082244] CR2: 0000000000000000 CR3: 0000000866d07000 CR4: 00000000000407e0 
[   50.090212] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 
[   50.098173] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 
[   50.106133] Stack: 
[   50.108388]  ffff8808653bbeb8 ffffffff81397c32 0000000000000002 00007f0faaf58000 
[   50.116671]  ffff8808653bbf48 0000000000000002 0000000000000000 ffff8808653bbed0 
[   50.124963]  ffffffff8139810f ffff8804674a6540 ffff8808653bbef0 ffffffff8122de0d 
[   50.133257] Call Trace: 
[   50.135993]  [<ffffffff81397c32>] __handle_sysrq+0xa2/0x170 
[   50.142219]  [<ffffffff8139810f>] write_sysrq_trigger+0x2f/0x40 
[   50.148841]  [<ffffffff8122de0d>] pro c_reg_write+0x3] Code: eb 9b 45 01 f4 45 39 65 34 75 e5 4c 89 ef e8 e2 f7 ff ff eb db 66 66 66 66 90 55 c7 05 50 d7 59 00 01 00 00 00 48 89 e5 0f ae f8 <c6> 04 25 00 00 00 00 01 5d c3 66 66 66 66 90 55 31 c0 c7 05 ce  
[   50.194758] RIP  [<ffffffff81397486>] sysrq_handle_crash+0x16/0x20 
[   50.201669]  RSP <ffff8808653bbe80> 
[   50.205558] CR2: 0000000000000000 
[    0.000000] Initializing cgroup subsys cpuset 
[    0.000000] Initializing cgroup subsys cpu 
[    0.000000] Initializing cgroup subsys cpuacct 
[    0.000000] Linux version 3.10.0-229.el7.x86_64 (mockbuild at x86-035.build.eng.bos.redhat.com) (gcc version 4.8.3 20140911 (Red Hat 4.8.3-7) (GCC) ) #1 SMP Thu Jan 29 18:37:38 EST 2015 
[    0.000000] Command line: BOOT_IMAGE=/vmlinuz-3.10.0-229.el7.x86_64 root=UUID=976a15c8-8cbe-44ad-bb91-23f9b18e8789 ro console=ttyS1,115200 nmi_watchdog=0 irqpoll nr_cpus=1 reset_devices cgroup_disable=memory mce=off numa=off udev.children-max=2 panic=10 rootflags=nofail acpi_no_memhotplug disable_cpu_apicid=0 elfcorehdr=869772K 
[    0.000000] e820: BIOS-provided physical RAM map: 
[    0.000000] BIOS-e820: [mem 0x0000000000000000-0x0000000000000fff] reserved 
[    0.000000] BIOS-e820: [mem 0x0000000000001000-0x0000000000099fff] usable 
[    0.000000] BIOS-e820: [mem 0x000000000009a000-0x000000000009ffff] reserved 
[    0.000000] BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved 
[    0.000000] BIOS-e820: [mem 0x000000002b000000-0x0000000035162fff] usable 
[    0.000000] BIOS-e820: [mem 0x000000007cf6d000-0x000000007d08cfff] ACPI NVS 
[    0.000000] BIOS-e820: [mem 0x000000007d08d000-0x000000007d109fff] ACPI data 
[    0.000000] BIOS-e820: [mem 0x000000007d10a000-0x000000007de92fff] reserved 
[    0.000000] BIOS-e820: [mem 0x000000007de93000-0x000000007de9bfff] ACPI NVS 
[    0.000000] BIOS-e820: [mem 0x000000007de9c000-0x000000007df3efff] reserved 
[    0.000000] BIOS-e820: [mem 0x000000007df3f000-0x000000007e393fff] ACPI NVS 
[    0.000000] BIOS-e820: [mem 0x000000007e394000-0x000000007ed9bfff] reserved 
[    0.000000] BIOS-e820: [mem 0x000000007ed9c000-0x000000007f7a7fff] ACPI NVS 
[    0.000000] BIOS-e820: [mem 0x000000007f7a8000-0x000000007f7fffff] reserved 
[    0.000000] BIOS-e820: [mem 0x0000000080000000-0x000000008fffffff] reserved 
[    0.000000] BIOS-e820: [mem 0x00000000fed1c000-0x00000000fed3ffff] reserved 
[    0.000000] BIOS-e820: [mem 0x00000000ff000000-0x00000000ffffffff] reserved 
[    0.000000] NX (Execute Disable) protection: active 
[    0.000000] SMBIOS 2.7 present. 
[    0.000000] No AGP bridge found 
[    0.000000] e820: last_pfn = 0x35163 max_arch_pfn = 0x400000000 
[    0.000000] x86 PAT enabled: cpu 0, old 0x7010600070106, new 0x7010600070106 
[    0.000000] x2apic enabled by BIOS, switching to x2apic ops 
[    0.000000] found SMP MP-table at [mem 0x000fce70-0x000fce7f] mapped at [ffff8800000fce70] 
[    0.000000] Using GB pages for direct mapping 
[    0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff] 
[    0.000000] init_memory_mapping: [mem 0x34e00000-0x34ffffff] 
[    0.000000] init_memory_mapping: [mem 0x34000000-0x34dfffff] 
[    0.000000] init_memory_mapping: [mem 0x2b000000-0x33ffffff] 
[    0.000000] init_memory_mapping: [mem 0x35000000-0x35162fff] 
[    0.000000] RAMDISK: [mem 0x31f7a000-0x32ffffff] 
[    0.000000] ACPI: RSDP 00000000000f0450 00024 (v02 NEC   ) 
[    0.000000] ACPI: XSDT 000000007d08d080 00084 (v01 NEC    SVWSPD21 01072009 AMI  00010013) 
[    0.000000] ACPI: FACP 000000007d098570 000F4 (v04 NEC    SVWSPD21 01072009 AMI  00010013) 
[    0.000000] ACPI: DSDT 000000007d08d198 0B3D3 (v02 NEC    SVWSPD21 00000015 INTL 20091112) 
[    0.000000] ACPI: FACS 000000007f7a5f80 00040 
[    0.000000] ACPI: APIC 000000007d098668 00224 (v03 NEC    SVWSPD21 01072009 AMI  00010013) 
[    0.000000] ACPI: MCFG 000000007d098890 0003C (v01 NEC    SVWSPD21 01072009 MSFT 00000097) 
[    0.000000] ACPI: SRAT 000000007d0988d0 004B0 (v01 NEC    SVWSPD21 00000001 AMI. 00000000) 
[    0.000000] ACPI: SLIT 000000007d098d80 00030 (v01 NEC    SVWSPD21 00000000 AMI. 00000000) 
[    0.000000] ACPI: HPET 000000007d098db0 00038 (v01 NEC    SVWSPD21 01072009 AMI. 00000005) 
[    0.000000] ACPI: PRAD 000000007d098de8 000BE (v02 PRADID  PRADTID 00000001 MSFT 03000001) 
[    0.000000] ACPI: SSDT 000000007d098ea8 70104 (v02 NEC    SVWSPD21 00004000 INTL 20090903) 
[    0.000000] ACPI: SLIC 000000007d108fb0 00176 (v01 NEC    SVWSPD21 00000000 CAS  00000001) 
[    0.000000] ACPI: SPCR 000000007d109128 00050 (v01 NEC    SVWSPD21 01072009 AMI. 00000005) 
[    0.000000] ACPI: DMAR 000000007d109178 00138 (v01 NEC    SVWSPD21 00000001 INTL 00000001) 
[    0.000000] ACPI: BERT 000000007d1092b0 00030 (v01 NEC    SVWSPD21 00000000      00000000) 
[    0.000000] Setting APIC routing to cluster x2apic. 
[    0.000000] NUMA turned off 
[    0.000000] Faking a node at [mem 0x0000000000000000-0x0000000035162fff] 
[    0.000000] Initmem setup node 0 [mem 0x00000000-0x35162fff] 
[    0.000000]   NODE_DATA [mem 0x3513c000-0x35162fff] 
[    0.000000] Zone ranges: 
[    0.000000]   DMA      [mem 0x00001000-0x00ffffff] 
[    0.000000]   DMA32    [mem 0x01000000-0xffffffff] 
[    0.000000]   Normal   empty 
[    0.000000] Movable zone start for each node 
[    0.000000] Early memory node ranges 
[    0.000000]   node   0: [mem 0x00001000-0x00099fff] 
[    0.000000]   node   0: [mem 0x2b000000-0x35162fff] 
[    0.000000] ACPI: PM-Timer IO Port: 0x408 
[    0.000000] ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled) 
[    0.000000] ACPI: Disabling requested cpu. Processor 0/0x0 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x02] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 almost reached. Keeping one slot for boot cpu.  Processor 1/0x2 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x04] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 almost reached. Keeping one slot for boot cpu.  Processor 2/0x4 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x06] lapic_id[0x06] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 almost reached. Keeping one slot for boot cpu.  Processor 3/0x6 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x08] lapic_id[0x08] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 almost reached. Keeping one slot for boot cpu.  Processor 4/0x8 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x0a] lapic_id[0x0a] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 almost reached. Keeping one slot for boot cpu.  Processor 5/0xa ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x0c] lapic_id[0x0c] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 almost reached. Keeping one slot for boot cpu.  Processor 6/0xc ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x0e] lapic_id[0x0e] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 almost reached. Keeping one slot for boot cpu.  Processor 7/0xe ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x10] lapic_id[0x20] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 almost reached. Keeping one slot for boot cpu.  Processor 8/0x20 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x12] lapic_id[0x22] enabled) 
[    0.000000] ACPI: LAPIC (acpi_id[0x14] lapic_id[0x24] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 10/0x24 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x16] lapic_id[0x26] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 11/0x26 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x18] lapic_id[0x28] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 12/0x28 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x1a] lapic_id[0x2a] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 13/0x2a ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x1c] lapic_id[0x2c] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 14/0x2c ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x1e] lapic_id[0x2e] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 15/0x2e ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 16/0x1 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x03] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 17/0x3 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x05] lapic_id[0x05] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 18/0x5 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x07] lapic_id[0x07] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 19/0x7 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x09] lapic_id[0x09] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 20/0x9 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x0b] lapic_id[0x0b] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 21/0xb ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x0d] lapic_id[0x0d] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 22/0xd ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x0f] lapic_id[0x0f] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 23/0xf ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x11] lapic_id[0x21] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 24/0x21 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x13] lapic_id[0x23] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 25/0x23 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x15] lapic_id[0x25] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 26/0x25 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x17] lapic_id[0x27] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 27/0x27 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x19] lapic_id[0x29] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 28/0x29 ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x1b] lapic_id[0x2b] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 29/0x2b ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x1d] lapic_id[0x2d] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 30/0x2d ignored. 
[    0.000000] ACPI: LAPIC (acpi_id[0x1f] lapic_id[0x2f] enabled) 
[    0.000000] ACPI: NR_CPUS/possible_cpus limit of 1 reached.  Processor 31/0x2f ignored. 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x02] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x04] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x06] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x08] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x0a] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x0c] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x0e] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x10] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x12] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x14] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x16] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x18] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x1a] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x1c] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x1e] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x03] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x05] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x07] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x09] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x0b] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x0d] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x0f] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x11] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x13] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x15] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x17] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x19] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x1b] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x1d] high edge lint[0x1]) 
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x1f] high edge lint[0x1]) 
[    0.000000] ACPI: IOAPIC (id[0x00] address[0xfec00000] gsi_base[0]) 
[    0.000000] IOAPIC[0]: apic_id 0, version 32, address 0xfec00000, GSI 0-23 
[    0.000000] ACPI: IOAPIC (id[0x02] address[0xfec01000] gsi_base[24]) 
[    0.000000] IOAPIC[1]: apic_id 2, version 32, address 0xfec01000, GSI 24-47 
[    0.000000] ACPI: IOAPIC (id[0x03] address[0xfec40000] gsi_base[48]) 
[    0.000000] IOAPIC[2]: apic_id 3, version 32, address 0xfec40000, GSI 48-71 
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) 
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) 
[    0.000000] Using ACPI (MADT) for SMP configuration information 
[    0.000000] ACPI: HPET id: 0x8086a701 base: 0xfed00000 
[    0.000000] smpboot: 32 Processors exceeds NR_CPUS limit of 1 
[    0.000000] smpboot: Allowing 1 CPUs, 0 hotplug CPUs 
[    0.000000] PM: Registered nosave memory: [mem 0x0009a000-0x0009ffff] 
[    0.000000] PM: Registered nosave memory: [mem 0x000a0000-0x000dffff] 
[    0.000000] PM: Registered nosave memory: [mem 0x000e0000-0x000fffff] 
[    0.000000] PM: Registered nosave memory: [mem 0x00100000-0x2affffff] 
[    0.000000] e820: [mem 0x90000000-0xfed1bfff] available for PCI devices 
[    0.000000] Booting paravirtualized kernel on bare hardware 
[    0.000000] setup_percpu: NR_CPUS:5120 nr_cpumask_bits:1 nr_cpu_ids:1 nr_node_ids:1 
[    0.000000] PERCPU: Embedded 28 pages/cpu @ffff880034e00000 s82752 r8192 d23744 u2097152 
[    0.000000] Built 1 zonelists in Node order, mobility grouping on.  Total pages: 40798 
[    0.000000] Policy zone: DMA32 
[    0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-3.10.0-229.el7.x86_64 root=UUID=976a15c8-8cbe-44ad-bb91-23f9b18e8789 ro console=ttyS1,115200 nmi_watchdog=0 irqpoll nr_cpus=1 reset_devices cgroup_disable=memory mce=off numa=off udev.children-max=2 panic=10 rootflags=nofail acpi_no_memhotplug disable_cpu_apicid=0 elfcorehdr=869772K 
[    0.000000] Misrouted IRQ fixup and polling support enabled 
[    0.000000] This may significantly impact system performance 
[    0.000000] Disabling memory control group subsystem 
[    0.000000] PID hash table entries: 1024 (order: 1, 8192 bytes) 
[    0.000000] xsave: enabled xstate_bv 0x7, cntxt size 0x340 
[    0.000000] Checking aperture... 
[    0.000000] No AGP bridge found 
[    0.000000] Memory: 126944k/869772k available (6241k kernel code, 703900k absent, 38928k reserved, 4181k data, 1604k init) 
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 
[    0.000000] Hierarchical RCU implementation. 
[    0.000000] 	RCU restricting CPUs from NR_CPUS=5120 to nr_cpu_ids=1. 
[    0.000000] 	Experimental no-CBs for all CPUs 
[    0.000000] 	Experimental no-CBs CPUs: 0. 
[    0.000000] NR_IRQS:327936 nr_irqs:256 16 
[    0.000000] Spurious LAPIC timer interrupt on cpu 0 
[    0.000000] Console: colour dummy device 80x25 
[    0.000000] console [ttyS1] enabled 
[    0.001000] tsc: Fast TSC calibration using PIT 
[    0.002000] tsc: Detected 2000.018 MHz processor 
[    0.000002] Calibrating delay loop (skipped), value calculated using timer frequency.. 4000.03 BogoMIPS (lpj=2000018) 
[    0.011888] pid_max: default: 32768 minimum: 301 
[    0.017077] Security Framework initialized 
[    0.021662] SELinux:  Initializing. 
[    0.025640] Dentry cache hash table entries: 32768 (order: 6, 262144 bytes) 
[    0.033499] Inode-cache hash table entries: 16384 (order: 5, 131072 bytes) 
[    0.041197] Mount-cache hash table entries: 4096 
[    0.046576] Initializing cgroup subsys memory 
[    0.051455] Initializing cgroup subsys devices 
[    0.056422] Initializing cgroup subsys freezer 
[    0.061390] Initializing cgroup subsys net_cls 
[    0.066364] Initializing cgroup subsys blkio 
[    0.071145] Initializing cgroup subsys perf_event 
[    0.076404] Initializing cgroup subsys hugetlb 
[    0.081408] CPU: Physical Processor ID: 1 
[    0.085890] CPU: Processor Core ID: 1 
[    0.089991] ENERGY_PERF_BIAS: Set to 'normal', was 'performance' 
[    0.089991] ENERGY_PERF_BIAS: View and update with x86_energy_perf_policy(8) 
[    0.104561] Last level iTLB entries: 4KB 512, 2MB 0, 4MB 0 
[    0.104561] Last level dTLB entries: 4KB 512, 2MB 32, 4MB 32 
[    0.104561] tlb_flushall_shift: 6 
[    0.126986] Freeing SMP alternatives: 24k freed 
[    0.133595] ACPI: Core revision 20130517 
[    0.154363] ACPI: All ACPI Tables successfully acquired 
[    0.160257] ftrace: allocating 23909 entries in 94 pages 
[    0.179567] dmar: Host address width 46 
[    0.183858] dmar: DRHD base: 0x000000fbffe000 flags: 0x0 
[    0.189795] dmar: IOMMU 0: reg_base_addr fbffe000 ver 1:0 cap d2078c106f0462 ecap f020fe 
[    0.198842] dmar: DRHD base: 0x000000dfffc000 flags: 0x1 
[    0.204782] dmar: IOMMU 1: reg_base_addr dfffc000 ver 1:0 cap d2078c106f0462 ecap f020fe 
[    0.213823] dmar: RMRR base: 0x0000007dea3000 end: 0x0000007dedafff 
[    0.220834] dmar: ATSR flags: 0x0 
[       0.838008] pci 0000:00:02.2: PCI bridge to [bus 01] 
[    0.843617] pci 0000:00:03.0: PCI bridge to [bus 20-3c] 
[    0.849517] pci 0000:00:11.0: PCI bridge to [bus 50-5f] 
[    0.855410] pci 0000:00:1c.0: PCI bridge to [bus 60-61] 
[    0.863257] pci 0000:00:1c.7: PCI bridge to [bus 62-67] 
[    0.869171] pci 0000:00:1e.0: PCI bridge to [bus 6a] (subtractive decode) 
[    0.876828] acpi PNP0A08:00: Disabling ASPM (FADT indicates it is unsupported) 
[    0.885139] ACPI: PCI Root Bridge [UNC0] (domain 0000 [bus 7f]) 
[    0.891750] acpi PNP0A03:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI] 
[    0.900880] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM 
[    0.908299] PCI host bridge to bus 0000:7f 
[    0.912871] pci_bus 0000:7f: root bus resource [bus 7f] 
[    0.920945] ACPI: PCI Root Bridge [PCI1] (domain 0000 [bus 80-fe]) 
[    0.927846] acpi PNP0A08:01: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI] 
[    0.937106] acpi PNP0A08:01: _OSC: platform does not support [AER] 
[    0.944123] acpi PNP0A08:01: _OSC: OS now controls [PCIeHotplug PME PCIeCapability] 
[    0.952860] PCI host bridge to bus 0000:80 
[    0.957433] pci_bus 0000:80: root bus resource [bus 80-fe] 
[    0.963555] pci_bus 0000:80: root bus resource [io  0xa000-0xffff] 
[    0.970451] pci_bus 0000:80: root bus resource [mem 0xe0000000-0xfbffffff] 
[    0.979463] pci 0000:80:00.0: PCI bridge to [bus 81-8f] 
[    0.985306] acpi PNP0A08:01: Disabling ASPM (FADT indicates it is unsupported) 
[    0.993424] ACPI: PCI Root Bridge [UNC1] (domain 0000 [bus ff]) 
[    1.000033] acpi PNP0A03:01: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI] 
[    1.009155] acpi PNP0A03:01: _OSC failed (AE_NOT_FOUND); disabling ASPM 
[    1.016580] PCI host bridge to bus 0000:ff 
[    1.021153] pci_bus 0000:ff: root bus resource [bus ff] 
[    1.029013] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 *5 6 7 12 14 15), disabled. 
[    1.037527] ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 *7 12 14 15), disabled. 
[    1.046043] ACPI: PCI Interrupt Link [LNKC] (IRQs 3 *4 5 6 12 14 15), disabled. 
[    1.054354] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 *5 6 12 14 15), disabled. 
[    1.062659] ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 6 7 10 12 14 15) *0, disabled. 
[    1.071462] ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 6 7 10 12 14 15) *0, disabled. 
[    1.080266] ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 6 7 *10 12 14 15), disabled. 
[    1.088873] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 6 7 *10 12 14 15), disabled. 
[    1.098586] acpi LNXCPU:12: BIOS reported wrong ACPI id 0 for the processor 
[    1.107217] ACPI: Enabled 3 GPEs in block 00 to 3F 
[    1.112688] vgaarb: device added: PCI:0000:62:00.0,decodes=io+mem,owns=io+mem,locks=none 
[    1.121727] vgaarb: loaded 
[    1.124745] vgaarb: bridge control possible 0000:62:00.0 
[    1.130752] SCSI subsystem initialized 
[    1.134961] ACPI: bus type USB registered 
[    1.139448] usbcore: registered new interface driver usbfs 
[    1.145585] usbcore: registered new interface driver hub 
[    1.151536] usbcore: registered new device driver usb 
[    1.157261] PCI: Using ACPI for IRQ routing 
[    1.166361] NetLabel: Initializing 
[    1.170164] NetLabel:  domain hash size = 128 
[    1.175024] NetLabel:  protocols = UNLABELED CIPSOv4 
[    1.180585] NetLabel:  unlabeled traffic allowed by default 
[    1.186864] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0, 0, 0, 0, 0, 0 
[    1.193861] hpet0: 8 comparators, 64-bit 14.318180 MHz counter 
[    1.202396] Switching to clocksource hpet 
[    1.211432] pnp: PnP ACPI init 
[    1.214855] ACPI: bus type PNP registered 
[    1.219416] system 00:00: [mem 0xfc000000-0xfcffffff] has been reserved 
[    1.226803] system 00:00: [mem 0xfd000000-0xfdffffff] has been reserved 
[    1.234190] system 00:00: [mem 0xfe000000-0xfeafffff] has been reserved 
[    1.241580] system 00:00: [mem 0xfeb00000-0xfebfffff] has been reserved 
[    1.248970] system 00:00: [mem 0xfed00400-0xfed3ffff] could not be reserved 
[    1.256743] system 00:00: [mew full-speed USB device number 3 using ehci-pci 
[     4.642333] b53269] bnx2x 0000:02:00.2: part number 394D4342-31383735-30315430-473030 
[    4.754097] usb 2-1.1: New USB device found, idVendor=046b, idProduct=ff10 
[    4.761776] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 
[    4.769944] usb 2-1.1: Product: Virtual Keyboard and Mouse 
[    4.776078] usb 2-1.1: Manufacturer: American Megatrends Inc. 
[    4.784918] bnx2x 0000:02:00.3: msix capability found 
[    4.794890] input: American Megatrends Inc. Virtual Keyboard and Mouse as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/input/input2 
[    4.810287] bnx2x 0000:02:00.3: part number 394D4342-31383735-30315430-473030 
[    4.832949] hid-generic 0003:046B:FF10.0001: input,hidraw0: USB HID v1.10 Keyboard [American Megatrends Inc. Virtual Keyboard and Mouse] on usb-0000:00:1d.0-1.1/input0 
[    4.868726] input: American Megatrends Inc. Virtual Keyboard and Mouse as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.1/input/input3 
[    4.897947] hid-generic 0003:046B:FF10.0002: input,hidraw1: USB HID v1.10 Mouse [American Megatrends Inc. Virtual Keyboard and Mouse] on usb-0000:00:1d.0-1.1/input1 
[    4.915125] bnx2x 0000:02:00.4: msix capability found 
[    4.925275] bnx2x 0000:02:00.4: part number 394D4342-31383735-30315430-473030 
[    5.020362] usb 2-1.3: new high-speed USB device number 4 using ehci-pci 
[    5.028219] bnx2x 0000:02:00.5: msix capability found 
[    5.038287] bnx2x 0000:02:00.5: part number 394D4342-31383735-30315430-473030 
[     5.135374] b0.6: msix capability found 
[     5.146276] b[    5.191222] usb 2-1.3: New USB device found, idVendor=046b, idProduct=ff92 
[    5.198902] usb 2-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=4 
[    5.207062] usb 2-1.3: Product: Composite Device 
[    5.212220] usb 2-1.3: Manufacturer: American Megatrends Inc. 
[    5.218638] usb 2-1.3: SerialNumber: AAAABBBBCCCC4 
[    5.279368] bnx2x 0000:02:00.7: msix capability found 
[    5.292279] bnx2x 0000:02:00.7: part number 394D4342-31383735-30315430-473030 
[    5.430381] bnx2x 0000:01:00.0: msix capability found 
[    5.441297] bnx2x 0000:01:00.0: part number 394D4342-31383735-30315430-473030 
[    5.504653] bnx2x 0000:01:00.1: msix capability found 
[    5.515280] bnx2x 0000:01:00.1: part number 394D4342-31383735-30315430-473030 
[     6.082783] Upower saving mode enabled? 
[    6.095706] Dazed and confused, but trying to continue 
[   81.655507] Kernel panic - not syncing: Timeout synchronizing machine check over CPUs 
[   82.729324] Shutting down cpus with NMI 
[   82.774539] drm_kms_helper: panic occurred, switching back to text console 
[   82.782257] Rebooting in 10 seconds.. 
[   92.787401] ACPI MEMORY or I/O RESET_REG. 
[   95.233944] ACPI MEMORY or I/O RESET_REG.



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