[Pkg-xen-devel] domU lenny not working: kernel BUG at lib/radix-tree.c:474!

[Ian Campbell]

On Sun, 2008-08-24 at 10:39 +0100, Sally-Anne Edwards wrote:
> Trying to create a 32 bit domU is unsuccessful.
> 
> I also tried some of the older builds from
> http://people.debian.org/~joeyh/d-i/images and found similar problems
> 
> Can someone point me to an installer kernel that will work?

This is the bug discussed
http://marc.info/?l=linux-kernel&m=121912581909992&w=2 and eventually
fixed by
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d847471d063663b9f36927d265c66a270c0cfaab

The fix is in the Debian kernel svn repository but hasn't yet been
uploaded.

I didn't expect that this bug would impact non-graphical Xen
installation (which isn't supported yet but I was playing with it) but
it seems like it does fail even in the text-mode over vfb scenario.

If you remove the vfb from your guest configuration and install over the
hvc console it ought to work. The Xen images don't currently support
graphical install mode anyhow so there's no real loss. Once the guest is
installed vfb seems to work again in text mode although I'm sure there
are plenty of things you can do to trigger the crash (anything which
mmap()s /dev/fb0 will cause it I think).

The underlying bug will be fixed once the kernel is uploaded and finds
its way into a d-i image.

Thanks for you report.

Ian.


-- 
Ian Campbell

Without adventure, civilization is in full decay.
		-- Alfred North Whitehead
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