linux-kernel - Re: [Fastboot] [PATCH 1/1] Allow i386 crash kernels to handle x86

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Message-ID: <aec7e5c30703160050w65df9cfaoafd469d1a37bdc4e@mail.gmail.com>
Date:	Fri, 16 Mar 2007 16:50:46 +0900
From:	"Magnus Damm" <magnus.damm@...il.com>
To:	Horms <horms@...ge.net.au>
Cc:	"Vivek Goyal" <vgoyal@...ibm.com>, fastboot@...ts.osdl.org,
	linux-kernel@...r.kernel.org,
	"Ian Campbell" <Ian.Campbell@...source.com>
Subject: Re: [Fastboot] [PATCH 1/1] Allow i386 crash kernels to handle x86_64 dumps

On 3/16/07, Horms <horms@...ge.net.au> wrote:
> On Fri, Mar 16, 2007 at 08:52:30AM +0530, Vivek Goyal wrote:
> > So it will now be left to the user. If he tries to kexec to a 64bit kernel
> > on a machine not supporting 32bit extensions, then kexec will not give
> > any advance warning.
>
> I feel comfortable with that. Well for now anyway.
> But I think that Magnus has other ideas.

I don't mind switching back and forth between 32-bit and 64-bit for
plain kexec, especially if we can validate that the kernel we load
will use an instruction set that is supported. But for kdump,
switching between 32-bit and 64-bit kernels is just another new
dimension in the already too complex kdump matrix IMO.

I think more focus should be put on fixing up bugs in kexec-tools than
adding new features.

/ magnus
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