RH now exiting 1 more data center

[Norman Gaywood]

On Tue, Feb 24, 2004 at 09:40:27PM -0500, Michael Gargiullo wrote:
> I find this thread very interesting. We run several multiproc boxes on
> FC1 without a hitch.  I will say, I don't think any of them are overly
> stressed, I like to over build when I have the chance.
> 
> Tyan MB with AMD chips, and Dell 2650's dual Intel Xeon w
> hyperthreading.

I have on of those, amongst others, and I can get it to lockup at will.

> We run the FC1 SMP kernels...  Should I be looking for anything specific
> to go wrong?

These are the bugzillas:

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=109962
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=109497

The thing, in fact the only thing I can see, that triggers this bug is a
umount. http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=109962#c40
has a script that continuously mount/umount's a small loop-back file
system. Hangs my FC1 SMP systems every time.

I have got also got hangs when a new kernel is installed. One of the
last steps of this is the creation of the initrd. That involves a loop
back mount, and an umount. The kernel sometimes locks up on the umount.

My impression is that the lockup is more likely to occur if there is
some disk activity at the time.

-- 
Norman Gaywood, Systems Administrator
School of Mathematics, Statistics and Computer Science
University of New England, Armidale, NSW 2351, Australia

norm at turing.une.edu.au            Phone: +61 (0)2 6773 2412
http://turing.une.edu.au/~norm    Fax:   +61 (0)2 6773 3312

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