Kernel debugger in MP mode causes double fault

Adam Lackorzynski adam at
Sat Jun 1 00:05:29 CEST 2013

On Fri May 31, 2013 at 19:10:36 +0200, Markus Partheymueller wrote:
> has anyone tried to invoke the kernel debugger in a multiprocessor setup?
> When I boot the demo scenario in qemu with qemu -smp 2 -cpu core2duo and
> then hit Escape, the system crashes with a double fault. Without smp or
> with -cpu qemu32 the problem doesn't occur. Can someone confirm this issue
> or give a hint what could be wrong?

I think you're hitting this:

Adam                 adam at

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