Hi,

> we've also had two reports about issues with 32-bit guests now[0][1]
> (both had '-m 4096' in the QEMU commandline), which I was able to
> reproduce with a 32-bit Debian 12.6 install, so nothing ancient ;) The
> QEMU commandline is below[2].
> 
> Unfortunately, it still fails to boot, even with the "limit address
> space used for pci devices, part two" patch applied on top of rel-1.16.3
> (and using current QEMU master).

Reproduces here.  Seems there is something seriously wrong in that
debian kernel.

Even when going for 36 phys bits (-cpu host,host-phys-bits-limit=36),
which is the physical address space of PAE mode when it was introduced
by the pentium pro, the guest fails to boot.  That *really* should not
happen.

I guess what you are seeing here is i386 support in the linux kernel
starting to bitrot due to everybody moving to 64-bit ...

take care,
  Gerd

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