Date: Mon, 15 Feb 1999 18:00:16 -0500 (EST) From: Luoqi Chen <luoqi@watermarkgroup.com> To: current@FreeBSD.ORG, khetan@iafrica.com Subject: Re: Problems in VM structure ? Message-ID: <199902152300.SAA15708@lor.watermarkgroup.com>
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> Hi.
>
> I saw that my 4-CURRENT box from 8 February dropped to ddb
> after my last make world. I rebuilt world today, and the
> same problem is occuring. These problems started occuring
> after Matt Dillon's changes to the VM system.
>
> What is worrying/troubling is that in single user mode,
> the machine is stable, and manages to build world without
> a problem. When booted into multi-user mode, it's stable
> and usable for anywhere from 1 to 3 hours, and then
> panics. There are no active users on at the time, and the
> machine is not heavily loaded (0.0-0.2)
>
> I suspected a hardware error, so swopped all the RAM from a
> production machine, and it still produces the same fault.
>
> The error is
> panic: vm_fault: fault on nofault entry, addr : f2572000
This indicates an unmapped struct buf, should be a software bug.
> Debugger ("panic")
> Stopped at Debuger+0x37: movl $0,in_Debugger
>
> When I hit c, I get this :
>
Could you type in "bt" next time this happens, and post the result?
-lq
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