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From: Paul Brook <paul@codesourcery.com>
Subject: Re: [Qemu-devel] [PATCH] fix gdbstub support for multiple threads in
	usermode, v2
Date: Tue, 2 Jun 2009 22:56:24 +0100
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To: Nathan Froyd <froydnj@codesourcery.com>
Cc: qemu-devel@nongnu.org

> > Could we use the real TID? Seems silly to invent a new value when the
> > host has already found one for us...
>
> That would work for threaded usermode emulation.  But for multiple-cpu
> system-mode emulation, the CPUs are unlikely to have unique TID values
> (e.g. r2 on powerpc or what have you).  And if you're going to support
> hotplugging someday, you're going to have support generation of unique
> IDs somewhere along the way.  Using the same code for usermode and
> system mode seems like the better, more robust/future-proof option.

Using threads for CPU emulation is just plain wrong.

Paul