Re: [nottingham] Panics, kernel 2.4 (fwd)

From: Robert Davies (rob_davies@ntlworld.com)
Date: Wed 02 Jan 2002 - 15:44:45 GMT


On Wednesday 02 January 2002 1:56 pm, you wrote:

> Today the problem is back, symptoms they have reported to me (I work part
> so it's quite difficult to deal with these types of problem sometimes) are
> that their samba shares dissappeared and there "might be a network problem
> of some kind". I attempted to login immediately and the machine was still
> semi up since I was able to get part way through an ssh authentication
> before the box went dead (it probably started killing stuff or something).

> Tonight I shall be upgrading to 2.4.17 and will run a bunch more tests
> (additional suggestions for tests welcome).

serial console would help, especially if you can log the panic's into a
logfile on another machine linked by serial cable.

I've seen similar sounding problems, when a developer played with modperl on
a production web server (I was away on holiday), basically the Linux VM folds
under really heavy abuse which is why they consider a VM similar to FreeBSD's
in 2.5/2.6.

On those 3Com cards, I've seen problems in past, where an interface drops
out, and needs an ifconfig down & up to restart it, often when someone played
about with the networking cables on the switching hub. But it doesn't sound
like that one, from your ssh response.

Perhaps you'ld consider using a remote logging server, and have syslog over
net, to get access to more info? You could perhaps put in some cron jobs,
doing things like ps auxwww to a log file every minute, and or use logger(1)
in your places scripts to record what's going on when the problems are
triggered.

Have fun, but you know what you say to your luser's when they report
problems, without copy/pasting error messages or showing you log files :)

Rob

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