Re: build.sh soft-halts machine on 4.99.49 kernel, with 4.99.48 userland.

[Andrew Doran <ad%netbsd.org@localhost>]

On Fri, Jan 11, 2008 at 12:36:58PM -0800, Marc Tooley wrote:

> uname -a: 
> 
> NetBSD shog 4.99.49 NetBSD 4.99.49 (shog) #0: Thu Jan 10 21:01:10 PST 
> 2008  root@shog:/v/src-current-build/sys/arch/i386/compile/shog i386
> 
> The machine itself is:
> 
> . Pentium D 930 (obviously running in 32-bit mode.)
> . Intel D945GNT motherboard
> . 2.5 GB RAM (already run through memtest86+)
> 
> Kenel is an i386 debug kernel built from sources rsync'd from I believe 
> January 9. Userland was from 4.99.48, which I believe was sync'd and 
> built about two weeks earlier.
> 
> The symptoms are that the machine will happily churn along doing its 
> thing with a build.sh -j 4 until.. suddenly it'll stop. Interactive 
> bash commands seem to function, until I try to create a new process or 
> a run a non-builtin bash command. Then that session will simply never 
> return.
> 
> I can hit enter and the keyboard is responsive. Breaking into the kernel 
> debugger gives me a list of processes that are sitting in vm_map.
> 
> I have no backtraces, as there is no panic. It's just sitting there, 
> responsive to keyboard input and *already running* network login 
> sessions; but nothing new gets done.
> 
> I was trying to watch vmstat -i but I lost my screen session.
> 
> Hints appreciated.

What does 'ps axs' or 'ps/w' from the debugger say? What kind of file system
configuration does the machine have?

Cheers,
Andrew