Date: Mon, 21 May 2001 11:38:35 +0000 (GMT) From: Tim Wiess <twiess@ahaza.com> To: <hackers@freebsd.org> Subject: 4GB Message-ID: <20010521110007.J316-100000@akira.ahaza.com>
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Hello all,
I've been experiencing some major problems running FreeBSD on 4GB of
memory, and I was curious if anyone has experienced this before.
Bascially, the problem is that FreeBSD just won't boot. Shortly after the
kernel gains control of the system, it panics...
Fatal trap 12: page fault while in kernel mode
mp_lock = 0000000b; cpuid = 0; lapic.id = 00000000
fault virtual address = 0xbff11000
fault code = supervisor write, page not present
instruction pointer = 0x8:0xc027e48c
stack pointer = 0x10:0xc03c4f30
frame pointer = 0x10:0xc03c4f3c 95
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 = net tty bio cam <- SMP: XXX
kernel: type 12 trap, code=0
Stopped at 0xc027e48c: movl %edx,0xbfc00000(,%eax,4)
The IP is pointing to the pmap_map() loop. So it's clearly having problems
mapping out the VM.
I have yet to do any rigorous debugging, but I thought I would run this by
the mailing list before I do. The system is running on a Tyan Tiger LE
board with dual PIIIs (860Mhz) and 4 1GB (133Mhz) SiliconTech chips.
I have tested Linux on this same configuration, and while it boots
normally, it will eventually panic with a similar error once you start
doing some real work.
Any thoughts?
thanks
tim
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