Date: Mon, 21 Feb 2000 13:34:15 -0700 From: "Kenneth D. Merry" <ken@kdm.org> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: Chris Csanady <cc@137.org>, freebsd-alpha@FreeBSD.ORG Subject: Re: Netbooting.. Message-ID: <20000221133415.A12166@panzer.kdm.org> In-Reply-To: <14512.38559.211308.554400@grasshopper.cs.duke.edu>; from gallatin@cs.duke.edu on Sun, Feb 20, 2000 at 08:50:55PM -0500 References: <38AB2424.C4C9D80D@ameslab.gov> <20000219193644.A81810@panzer.kdm.org> <38AF79AE.15C1FE6E@ameslab.gov> <20000220175537.A6047@panzer.kdm.org> <14512.36567.509885.796107@grasshopper.cs.duke.edu> <20000220182505.A6280@panzer.kdm.org> <14512.38559.211308.554400@grasshopper.cs.duke.edu>
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On Sun, Feb 20, 2000 at 20:50:55 -0500, Andrew Gallatin wrote:
> Kenneth D. Merry writes:
> > Seems to do the trick:
> >
> > misaligned mbuf in ip_input
> > misaligned mbuf in ip_input
> > misaligned mbuf in ip_input
> > misaligned mbuf in ip_input
>
> Since you're now in a position to debug this.. ;-)
> I wonder if NFS somehow mangled the same mbuf, and it keeps coming
> back to haunt us.. It might be interesting to print out the address of
> the mbuf & see if it repeats at all. And/or look at the lengths & see
> if there is any commonality.
Sure:
misaligned mbuf in ip_input
m = 0xfffffe00000b1200, ip = 0xfffffe00000b12a6, m_len = 76
misaligned mbuf in ip_input
m = 0xfffffe00000b9300, ip = 0xfffffe00000b93a6, m_len = 76
misaligned mbuf in ip_input
m = 0xfffffe00000b1500, ip = 0xfffffe00000b15a6, m_len = 76
misaligned mbuf in ip_input
m = 0xfffffe00000b1000, ip = 0xfffffe00000b10a6, m_len = 76
I think each of those packets is a response to NTP packets ntpdate -d sends
out. (Thus the reason the length is the same.)
> <...>
>
> > Most everything seems to work okay, except I get this whenever I login:
> >
> > Feb 20 17:20:18 modena login: chmod(/dev/ttyp0): Operation not supported
>
> I suspect this is coming from the chflags call in login. I've never
> really run a machine diskless. I only boot diskless for installs, so
> this is just a guess. You might want to look at using
> /etc/rc.diskless{1,2}
Ahh. I think what I'm doing will work for now, the diskless stuff looks
like it sets up MFS filesystems for /var. It looks like it would work well
for multiple-machine environments.
> > And the machine is of course slow, especially since it is netbooted.
> >
> > Is there any way to configure swap over NFS? Perhaps vnconfig a
> > NFS-mounted file and then swap on that device? :)
>
> That sounds pretty reasonable to me.
>
> Hopefully, that esp driver will get CAM'ified in no time & you won't
> need to run diskless for long ;)
Hopefully, yes.
Ken
--
Kenneth Merry
ken@kdm.org
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