Date: Wed, 19 Nov 1997 23:31:17 +0000 From: Brian Somers <brian@awfulhak.org> To: Doug White <dwhite@resnet.uoregon.edu> Cc: Brian Somers <brian@awfulhak.org>, Jonathan Chen <jonc@pinnacle.co.nz>, freebsd-questions@freebsd.org Subject: Re: Kernel panic in 2.2.2R with ppp Message-ID: <199711192331.XAA12010@awfulhak.demon.co.uk> In-Reply-To: Your message of "Wed, 19 Nov 1997 10:12:04 PST." <Pine.BSF.3.96.971119100750.3360F-100000@gdi.uoregon.edu>
next in thread | previous in thread | raw e-mail | index | archive | help
> On Wed, 19 Nov 1997, Brian Somers wrote: > > > Seriously, as you already suspect, it can't really be ppp that's > > causing the problem. I'd suspect a memory problem. Is the > > instruction pointer the same each time ? If so, the only way to > > diagnose this is to rebuild your kernel with symbols (-g), wait for > > it to crash again, and try to find out where the instruction pointer > > is pointing. > > Whihc of these should I be looking at? Using `nm /kernel | grep xxx', the > fault virtual addr doesn't point to anything but the instruction pointer > is in the middle of the msdosfs code. So it sounds like that's the problem. As fs access is asyncronous, the ``current process'' is irrelevent - it's random, but weighted towards whatever's being scheduled the most (maybe someone was doing a transfer to/from an MSDOS partition over the ppp link). Perhaps using mtools for a while instead of mounting any DOS partitions and seeing if the problem goes away may be in order. > > > > Fatal trap 12: page fault while in kernel mode > > > > fault virtual address = 0xf057a000 > > > > fault code = supervisor read, page not present > > > > instruction pointer = 0x8:0xf013d087 > > > > stack pointer = 0x10:0xefbffd80 > > > > frame pointer = 0x10:0xefbffd9c > > > > 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 = 24356 (ppp) > > > > interrupt mask = > > > > panic: page fault > > Doug White | University of Oregon > Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant > http://gladstone.uoregon.edu/~dwhite | Computer Science Major > > -- Brian <brian@Awfulhak.org>, <brian@FreeBSD.org>, <bri@OpenBSD.org> <http://www.Awfulhak.org>; Don't _EVER_ lose your sense of humour....
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199711192331.XAA12010>