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Date:      Wed, 5 May 1999 10:41:31 -0400 (EDT)
From:      Luoqi Chen <luoqi@watermarkgroup.com>
To:        current@FreeBSD.ORG, darius@dons.net.au
Subject:   Re:  SMP & APM
Message-ID:  <199905051441.KAA09586@lor.watermarkgroup.com>

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> Hi,
> Has anyone tried having APM and SMP in the same kernel? It panic()'s mine :)
> 
> Basically the machine panics a few seconds after I do 'apmconf -e'. apm seems
> to return normal values though.
> 
> I've attached a sample output from APM, dmesg and my kernel config.
> 
> I get a trap 12: page fault in kernel mode
> mp_lock = 01000009; cpuid = 1; lapic.id = 01000000
> fault virtual address = 0x75f0
> fault code = supervisor read, page not present
> interrupt pointer =     0x8:0xc0208a4c
> stack pointer =         0x10:0xff80dd78
> frame pointer =         0x10:0xff80dd7c
> code segment =          base 0x0, limit 0xfffff, type 0x1b
>                         DPL 0, pres 1, def32 1, gran 1
> processor eflags =      interrupt enabled, resume, IOPL = 0
> current process =       Idle
> interrupt mask =        <- SMP: XXX
> 
> Also, nm kernel.debug | sort shows that 0xc0208a4c is in Xbpt
> 
Are you sure it's in Xbpt? Xbpt has only 6 lines of code and none of them is
likely to generate a page fault. What's the address of symbol Xbpt?

> ---
> Daniel O'Connor software and network engineer
> for Genesis Software - http://www.gsoft.com.au
> "The nice thing about standards is that there
> are so many of them to choose from."
>   -- Andrew Tanenbaum
> 

-lq


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