[Fedora-xen] Can't boot RH7.2 fully-virtualized guest

[Karl Stevens]

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Hanks, Dan wrote:
> MXT page nr start=ffffffff len=ffffffff
> Ooops! Too many entries in the memory map”
> This ends in a kernel panic, complaining:
> “<0> Kernel panic: Attempted to kill the idle task! In idle task – not
> syncing”

We ran into the same problem.  The default kernel for RH7.2 is patched
to support "MXT" (automatic compression to/from RAM), and the HVM bios
confuses it.

Upgrade the kernel to one that doesn't have MXT (such as
kernel-smp-2.4.20-28.7) and you'll be fine.

There may also be a boot param to tell the kernel to ignore MXT, which
would likely have the same effect.

- -Karl
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