Re: Weird crash with -current amd64

[Paul Goyette <paul%whooppee.com@localhost>]

Here's the "show register" from this crash:

ds      0xfbf0
es      0xde5c
fs      0xfbf0
gs      0x8
rdi     0xffff80004aadbc80
rsi     0xffffffff8065cf00
rbp     0xffffffff8065fc70
rbx     0xffff80004aadbd70
rdx     0xf0
rcx     0x1e
rax     0xffff80004aadbc80
r8      0xffffffff801e4010      idle_loop
r9      0xffff80004aadbd68
r10     0x0
r11     0x0
r12     0xffff80004aaf2840
r13     0xffffffff8050dae0      proc0
r14     0xffffffff8050ce20      lwp0
r15     0x0
rip     0xffffffff8034263f      memcpy + 0x1f
cs      0x8
rflags  0x10246
rsp     0xffffffff8065fc18
ss      0x10

On Fri, 10 Sep 2010, Paul Goyette wrote:

> I've got a system with a ASUS M4A88T-M motherboard and a Phenom II X6 
> processor.
>
> A GENERIC kernel built from current sources boots just fine.  However, a 
> custom kernel fails early in boot with the following error:
>
> uvm_fault(0xffffffff80549520, 0xffff80004aadb000,2) -> e
> fatal page fault in supervisor mode
> trap type 6 code 2 rip ffffffff8034263f cs 8 rflags 10246 cr2 
> ffff80004aadbc80 cpl 8 rsp ffffffff8065fc18
> kernel: page fault trap, code=0
> Stopped in pid 0.1 (system) at netbsd:memcpy + 
> 0x1f: repe movsq (%rsi), %es:(%rdi)
>
> Backtrace shows
> memcpy + 0x1f
> uvm_lwp_fork + 0x11
> lwp_create + 0x255
> kthread_create + 0xd7
> create_idle_lwp + 0x41
> mi_cpi_attach + 0xb8
> main + 0x133
>
> I have attached the dmesg from booting today's GENERIC, plus the config -x 
> from the failing kernel.
>
> Any clues would be greatly appreciated!
>
>
> -------------------------------------------------------------------------
> | Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:       |
> | Customer Service | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com    |
> | Network Engineer | 0786 F758 55DE 53BA 7731 | pgoyette at juniper.net |
> | Kernel Developer |                          | pgoyette at netbsd.org  |
> -------------------------------------------------------------------------

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| Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:       |
| Customer Service | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com    |
| Network Engineer | 0786 F758 55DE 53BA 7731 | pgoyette at juniper.net |
| Kernel Developer |                          | pgoyette at netbsd.org  |
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