Re: [amd64] Reproducible cold boot failure (reboot succeeds) in -CURRENT

2011/11/10 Stefan Esser <se_at_freebsd.org>:
> For a few weeks I have been suffering from a problem that requires manual
> intervention to get my home workstation boot -CURRENT.
>
> The kernel panics at varying places and with different panic messages, e.g.
> (hand transcribed since kernel dumps don't work at that stage):
>
> privileged instruction fault while in kernel mode
>
> kmem_alloc_nofault +0x37
> kmem_init +0x9e
> vm_kmem_init +0x39
> mi_startup +0x77
> btext +0x2c
>
>
> On another cold boot attempt:
>
> kernel trap 12 with interrupts disabled
> Fatal trap 12: page fault while in kernel mode
>
> elf_relocinternal +0xa8
> link_elf_reloc_local +0x2fe
> link_elf_link_preload +0x69d
> linker_preload +0x101
> mi_startup +0x77
> btext +0x2c
>
>
> In all the cases observed, the system starts without any problems on second
> attempt (pressing RESET or the reboot command in the debugger).
> The system is working reliably, once booted.
>
> This started a few weeks back (after the switch-over to 10-CURRENT,
> IIRC), and I did not bother to report it at the time, since I thought it was
> caused by a temporary instability in the code base.
>
> The system is an i2600K on ASUS P8H67-M EVO with 8GB of RAM and an amd64
> kernel booting from ZFS (gptzfsboot). The kernel is a stripped down GENERIC
> plus IPFW and ath (but I doubt that the configuration is causing this, since
> the failure happens before any devices are probed and the identically
> configured kernels used to cold boot just fine for half a year).
>
> Any hint how to further diagnose this case is welcome (but my spare
> time is very limited and I cannot easily bisect to find a revision
> that boots, for example).
>
> I can produce further debug output on demand, but I do not have a serial or
> firewire console setup for debugging.
>
> Is anybody else affected by this boot problem?

Can you setup a videocamera or a simple serial console?
Did you try to boot with both -s and -v on?

Attilio


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