From: Akio Takebe <takebe_akio@jp.fujitsu.com>
Subject: Re: [Xen-devel] [Patch] [RFC] avoid debugger_trap when we
	don't expect
Date: Wed, 30 Jan 2008 17:48:20 +0900
Message-ID: <A5C8631CDD5215takebe_akio@jp.fujitsu.com>
References: <C3C5E576.13084%Keir.Fraser@cl.cam.ac.uk>
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To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>, xen-devel <xen-devel@lists.xensource.com>, xen-ia64-devel <xen-ia64-devel@lists.xensource.com>, xen-ppc-devel <xen-ppc-devel@lists.xensource.com>
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Hi, Keir

>This doesn't need to be fixed on x86 -- the int3 handler will return
>silently if the debugger is not configured. It would be nice if the ia64
>handler would do the same. If that is not possible then change only ia64
>code and if you need to be able to probe gdbstub configuration then add a
>public function to do that rather than grope at internal state. The same
>goes for powerpc, *if* it is broken in the first place.
>
I know the int3 hanlder return well on x86 if it is not configured.
But the route may be not safe. The debugger_trap is called after hypervisor
panic and dom0 panic. So I want to avoid the needless route for kexec/kdump.

Best Regards,

Akio Takebe