Re: [Xen-devel] Current xen-unstable xen crashing in boot

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

On 08/14/09 12:19, Jeremy Fitzhardinge wrote:
> I updated from hg today, and xen is crashing fairly early.  I haven't tried 
> bisecting yet, but the last
> working version was a week or two ago.
>
>           _____  ____                     _        _     _      
>  \ \/ /___ _ __   |___ / | ___|    _   _ _ __  ___| |_ __ _| |__ | | ___ 
>   \  // _ \ '_ \    |_ \ |___ \ __| | | | '_ \/ __| __/ _` | '_ \| |/ _ \
>   /  \  __/ | | |  ___) | ___) |__| |_| | | | \__ \ || (_| | |_) | |  __/
>  /_/\_\___|_| |_| |____(_)____/    \__,_|_| |_|___/\__\__,_|_.__/|_|\___|
>                                                                          
> (XEN) Xen version 3.5-unstable (jeremy@xxxxxxxxxxxxxxxxxxxx) (gcc version 
> 4.4.0 20090506 (Red Hat 4.4.0-4) (GCC) ) Fri Aug 14 10:48:57 PDT 2009
> (XEN) Latest ChangeSet: Fri Aug 14 17:26:23 2009 +0100 20067:5619bed51ec4
> (XEN) Command line: loglvl=all guest_loglvl=all com1=115200,8n1 console=com1 
> noreboot dom0_mem=768m
> (XEN) Video information:
> (XEN)  VGA is text mode 80x25, font 8x16
> (XEN)  VBE/DDC methods: V2; EDID transfer time: 2 seconds
> (XEN) Disc information:
> (XEN)  Found 1 MBR signatures
> (XEN)  Found 1 EDD information structures
> (XEN) Xen-e820 RAM map:
> (XEN)  0000000000000000 - 00000000000a0000 (usable)
> (XEN)  0000000000100000 - 000000007ffc0000 (usable)
> (XEN)  000000007ffc0000 - 000000007ffcfc00 (ACPI data)
> (XEN)  000000007ffcfc00 - 000000007ffff000 (reserved)
> (XEN)  00000000e0000000 - 00000000fec90000 (reserved)
> (XEN)  00000000fed00000 - 00000000fed00400 (reserved)
> (XEN)  00000000fee00000 - 00000000fee10000 (reserved)
> (XEN)  00000000ffb00000 - 0000000100000000 (reserved)
> (XEN) System RAM: 2047MB (2096512kB)
> (XEN) ACPI: RSDP 000FD650, 0014 (r0 DELL  )
> (XEN) ACPI: RSDT 000FD664, 0038 (r1 DELL   PE BKC          1 MSFT  100000A)
> (XEN) ACPI: FACP 000FD6B0, 0074 (r1 DELL   PE BKC          1 MSFT  100000A)
> (XEN) ACPI: DSDT 7FFC0000, 388D (r1 DELL   PE BKC          1 MSFT  100000E)
> (XEN) ACPI: FACS 7FFCFC00, 0040
> (XEN) ACPI: APIC 000FD724, 009C (r1 DELL   PE BKC          1 MSFT  100000A)
> (XEN) ACPI: SPCR 000FD7CC, 0050 (r1 DELL   PE BKC          1 MSFT  100000A)
> (XEN) ACPI: HPET 000FD81C, 0038 (r1 DELL   PE BKC          1 MSFT  100000A)
> (XEN) ACPI: MCFG 000FD854, 003C (r1 DELL   PE BKC          1 MSFT  100000A)
> (XEN) NUMA turned off
> (XEN) Faking a node at 0000000000000000-000000007ffc0000
> (XEN) Domain heap initialised
> (XEN) found SMP MP-table at 000fe710
> (XEN) DMI 2.3 present.
> (XEN) Using APIC driver default
> (XEN) ACPI: PM-Timer IO Port: 0x808
> (XEN) ACPI: ACPI SLEEP INFO: pm1x_cnt[804,0], pm1x_evt[800,0]
> (XEN) ACPI:                  wakeup_vec[7ffcfc0c], vec_size[20]
> (XEN) ACPI: Local APIC address 0xfee00000
> (XEN) ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
> (XEN) Processor #0 15:4 APIC version 20
> (XEN) ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled)
> (XEN) Processor #1 15:4 APIC version 20
> (XEN) ACPI: LAPIC (acpi_id[0x03] lapic_id[0x06] disabled)
> (XEN) ACPI: LAPIC (acpi_id[0x04] lapic_id[0x07] disabled)
> (XEN) ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])
> (XEN) ACPI: LAPIC_NMI (acpi_id[0x02] high edge lint[0x1])
> (XEN) ACPI: LAPIC_NMI (acpi_id[0x03] high edge lint[0x1])
> (XEN) ACPI: LAPIC_NMI (acpi_id[0x04] high edge lint[0x1])
> (XEN) ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
> (XEN) IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-23
> (XEN) ACPI: IOAPIC (id[0x03] address[0xfec80000] gsi_base[32])
> (XEN) IOAPIC[1]: apic_id 3, version 32, address 0xfec80000, GSI 32-55
> (XEN) ACPI: IOAPIC (id[0x04] address[0xfec83000] gsi_base[64])
> (XEN) IOAPIC[2]: apic_id 4, version 32, address 0xfec83000, GSI 64-87
> (XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
> (XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
> (XEN) ACPI: IRQ0 used by override.
> (XEN) ACPI: IRQ2 used by override.
> (XEN) ACPI: IRQ9 used by override.
> (XEN) Enabling APIC mode:  Flat.  Using 3 I/O APICs
> (XEN) ACPI: HPET id: 0xffffffff base: 0xfed00000
> (XEN) PCI: Found Intel Corporation E7520 Memory Controller Hub with MMCONFIG 
> support.
> (XEN) Using ACPI (MADT) for SMP configuration information
> (XEN) Early fatal page fault at e008:ffff828c8015415c (cr2=ffff83007fc75008, 
> ec=0000)
> (XEN) Stack dump: 000000000007fc76 000000000000000c ffff83007fc77ff0 
> ffff83007fc76000 ffff828c8026fe58 0000000000000262 0000000000000020 
> 0180000000000000 000000000000010c ffff828c802a6380 ffff83007fc75008 
> 0000000000000001 ffff830000000000 ffff828c80219b0c ffff83007fc76000 
> 0000000000000000 ffff828c8015415c 000000000000e008 0000000000010082 
> ffff828c8026fdd8 0000000000000000 ffff828c80154158 ffff828c8026fde8 
> 0000000000000262 00000000000002e2 0000000000000086 0000000000000262 
> 0000000000000000 000000008026fe18 ffff83007fc75008 ffff828c00000027 
> ffff83007fc76000 ffff828c8021dd60 0000000000000002 000000007fc42000 
> ffff83000008bfc0 ffff83000008bf40 0000000000002000 ffff828c8026fe68 
> ffff828c80154f85 ffff828c8026fe78 ffff828c80154fa5 ffff828c8026ff18 
> ffff828c802343ef 0000000000000000 0000000000000000 0000000000a1e000 
> 0000000000aca3e0 ffff83000008bf40 0000000000000000 00000000ffffffff 
> ffff83000000000c 0000000800000000 000000010000006e 0000000000000003 
> 00000000000002f8 0000000000000000 0000000000000000 0000000000000000 
> 0000000000000000 0000000000000000 0000000000000000 0000000000067e8c 
> ffff828c801000b5 0000000000000000 0000000000000000 0000000000000000 
> 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
> 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
> 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
> 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
> 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
> 0000000000000000 0000000000000000 0000000000000000 00000000fffff000 
>
> This appears to be:
> (gdb) x/i 0xffff828c8015415c 
> 0xffff828c8015415c <map_pages_to_xen+112>:    mov    (%rax),%rax
> (gdb) x/i 0xffff828c80154f85 
> 0xffff828c80154f85 <__memguard_change_range+237>:     leaveq 
>
> but I can't find a good enclosing frame from there (is there a tool to 
> pretty-print these stack traces?).
>   

I bisected it down to:

The first bad revision is:
changeset:   20038:1197585e32b7
user:        Keir Fraser <keir.fraser@xxxxxxxxxx>
date:        Fri Aug 07 17:29:50 2009 +0100
summary:     x86: Increase default max CPUs to 64.

    J


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