Stability of RELENG_5_4 with dual Xeon

[Kris Kennaway]

On Tue, May 17, 2005 at 12:51:23AM -0300, Marc G. Fournier wrote:
> On Mon, 16 May 2005, Kris Kennaway wrote:
> 
> >On Mon, May 16, 2005 at 05:57:33PM -0700, Jorge Aldana wrote:
> >>Well now I don't feel alone.
> >>
> >>5.2.1, 5.3, 5.4 I've gotten to lock up a workstation, with Nvidia-driver 
> >>as
> >>well though, htt-on, htt-off, only SHED_4BSD . Now with a new NetApp 
> >>server
> >>amd locks up as well but not the whole workstation, mounts to other 
> >>servers
> >>ok, nfs issue. Our FreeBSD count is getting low now due to these issues.
> >>
> >>All I need is a howto on getting the dump for the NFS issue so I can send
> >>something but on the lockups are total lockups, nothing in the logs its
> >>like somebody shot a freeze gun on the system, a hard reboot then its back
> >>(after a fsck on the system disk) but nothing in the log as if time
> >>stopped....
> >
> >See the developers handbook, which has a chapter on kernel debugging.
> 
> Just curious here ... there used to be a fantastic kernel module that 
> allowed you to do a 'coredump' across the network, which I used way back 
> when I didn't have enough swap space to do it ...
> 
> Which brings to mind ... has anyone every tried to do a 'console over 
> tcp/ip' that would send everything it could to a remote monitoring 
> machine?  There are several cases where, for some reason, you can no 
> longer do logging to syslog, which can be critical for debugging purposes 
> if you have no other way of knowing 'cause' of a crash/reboot ...
> 
> I realize that you can do alot of this at the hardware level, but for a 
> remote server that hasn't been setup for this, suddenly causing problems, 
> this might be a means of getting some sort of information ... even a 'gdb 
> over tcp' would be cool, if that was possible ...

Robert Watson did something like that once, I don't know what came of it.

Kris
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