Crash during boot on Asus P5N-MX MB

Daan Vreeken [PA4DAN] Danovitsch at
Tue Mar 25 01:35:31 PDT 2008

On Friday 21 March 2008 22:23:03 I wrote:
> Hi All,
> I'm having trouble booting FreeBSD (-current or 6.1) on a new PC using an
> Asus P5N-MX mother board equipped with a Intel E6750 Core 2 Duo processor.
> After adding some printf()'s I've found out that the kernel crashes in
> vm/vm_page.c - vm_page_startup()
> around the line :
> 	bzero((void *)mapped, end - new_end);
> This is the output of a verbose boot with VERBOSE_SYSINIT and custom
> printf()'s :
> GDB: no debug ports present
> KDB: debugger backends: ddb
> KDB: current backend: ddb
> SMAP type=01 base=0000000000000000 len=000000000009f000
> SMAP type=02 base=00000000000f0000 len=0000000000010000
> SMAP type=02 base=00000000fec00000 len=0000000001400000
> SMAP type=02 base=00000000f0000000 len=0000000002000000
> SMAP type=03 base=000000007fef3000 len=000000000000d000
> SMAP type=04 base=000000007fef0000 len=0000000000003000
> SMAP type=02 base=000000000009f000 len=0000000000001000
> SMAP type=01 base=0000000000100000 len=000000007fdf0000
> SMAP type=02 base=0000000077000000 len=0000000008000000
> SMAP type=01 base=000000007f000000 len=0000000000df0000
> Overlapping or non-monotonic memory region, ignoring second region

Flashing the motherboard to the latest available BIOS version removed the 
above "Overlapping ..." message and got the system to boot normally.


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