Sorry for the delay in responding today. Since I've got a few things to do,
I'll put the responses together here. Unfortunately, I won't be around over
the next couple of days, but if you have any requests I'll get on to them as
soon as I can next week.

> 1) Where did you get your 2.6.27 kernel?  Debian doesn't seem to have one.
>    (I can build one myself if I need to)

It's compiled myself. The current one is 2.6.27.4 obtained from
ftp.uk.kernel.org. For reference, I've attached a compressed copy of my kernel
config in case there is some useful information in there.

> 2) I have an AMD64 but I can't reproduce the crash.  However, mine is
>    single cpu.  Would it be possible for you to do a test with only one cpu
>    enabled?  It would help to know if this bug is associated with SMP.

Sort of. It's actually a dual core machine. I've tried booting the kernel with
the nosmp option (and with maxcpus=0), but this causes OOPSes in my SATA
controller driver, and so I can't mount any of the filesystems. However, I
have been able to book successfully with maxcpus=1, effectively making it an
SMP system with one processor. Hopefully this will be good enough - I'll look
at the UP booting problems separately.

This seems to have produced the same results. For reference, compressed strace
output is also attached.

> What is the value of HZ in your kernel?

It's set to 300.

Thanks very much for your persistence with this, I really do appreciate it. As
usual, let me know if there is anything else I can help with. Like I say,
there will likely be a bit of a delay over the next few days, but I'll get
things done as soon as I can next week.

All the best,
-Dave.

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