Date: Fri, 03 Mar 1995 21:37:41 -0800 From: David Greenman <davidg@Root.COM> To: ROBIN@ptnsct.nis.za (Robin Hunt) Cc: bugs@FreeBSD.org Subject: Re: 16/32 meg problem Message-ID: <199503040537.VAA00259@corbin.Root.COM> In-Reply-To: Your message of "Fri, 03 Mar 95 09:33:28 %2B0200." <950303093328.f7e3@ptnsct.nis.za>
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>I have previously queried this problem, but have not heard any more since >tuesday, and thought I'd re-ask: > >I have a 486DX2-80 with 16 Meg of RAM, a 2 meg caching IDE controller and it >works fine. > >Should I dare to add a further 16 meg to the machine, FreeBSD boots without any >problem - passing the memory test - but panics with the following message: > >Feb 24 17:08:17 ilink /kernel: >Feb 24 17:08:17 ilink /kernel: Fatal trap 12: page fault while in kernel mode >Feb 24 17:08:17 ilink /kernel: fault virtual address = 0x0 >Feb 24 17:08:17 ilink /kernel: fault code = supervisor read, page not present >Feb 24 17:08:17 ilink /kernel: instruction pointer = 0x8:0xf0168885 ... >f0168738 T _pmap_changebit I've looked at the code and I don't see anything obvious. It might be caused by a pmap corruption bug that we've been trying to find, but I can't tell for sure with the limited information I have. So the machine gets far enough to start up syslogd and other things? How long does it stay up before crashing? -DG
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