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Subject: Re: Need help to understand why kdump is for 64 bit PPC only
From: Michael Ellerman <michael@ellerman.id.au>
To: Kumar Gala <galak@kernel.crashing.org>
In-Reply-To: <1228A590-B809-4EBB-BC6F-05525220656A@kernel.crashing.org>
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	<1228A590-B809-4EBB-BC6F-05525220656A@kernel.crashing.org>
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Date: Tue, 16 Dec 2008 07:33:04 +1100
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Cc: Frank Fan <linuxppcstudy@gmail.com>, linuxppc-dev@ozlabs.org
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On Mon, 2008-12-15 at 13:35 -0600, Kumar Gala wrote:
> On Dec 15, 2008, at 12:58 PM, Frank Fan wrote:
>=20
> > Hello,
> >
> > I am working on a freescale MPC8572 CPU board and use 32 bit =20
> > Linux2.6.28.  When I enable 64 bit, it shows "kdump" in "kernel =20
> > options". Otherwise, "kdump" is disabled.
> > Can someone give me some hint why kdump is for 64 bit PPC only?
>=20
> Probably because no one has implemented or tested it on ppc32/8572.

Pretty much, the 32-bit version of default_machine_kexec() is pretty
na=C3=AFve, but you never know it might work.

cheers

--=20
Michael Ellerman
OzLabs, IBM Australia Development Lab

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person

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