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Subject: Re: [patch 0/9] kdump: Patch series for s390 support
From: Michael Holzheu <holzheu@linux.vnet.ibm.com>
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Date: Tue, 26 Jul 2011 11:32:36 +0200
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To: Vivek Goyal <vgoyal@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>, ebiederm@xmission.com, hbabu@us.ibm.com, mahesh@linux.vnet.ibm.com, oomichi@mxs.nes.nec.co.jp, horms@verge.net.au, heiko.carstens@de.ibm.com, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
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On Mon, 2011-07-25 at 14:07 -0400, Vivek Goyal wrote:
> On Fri, Jul 22, 2011 at 05:26:32PM +0200, Michael Holzheu wrote:
> > Hello Vivek,
> > 
> > Still thinking how we best get elfcorehdr size...
> > 
> > On Mon, 2011-07-18 at 11:25 -0400, Vivek Goyal wrote:
> > > On Mon, Jul 18, 2011 at 04:44:13PM +0200, Michael Holzheu wrote:
> > > You could do that but I think a more generic parameter will make more
> > > sense.
> > > 
> > > - Either something along the lines of memmap=
> > > - Or excludemem=x@y
> > > - Or modify memory map in s390 specific bootloading protocol block etc.
> > 
> > Wouldn't it be most natural to pass the length along with the address of
> > the ELF core header? What about extending the kernel elfcorehdr kernel
> > parameter and adding optional size:
> > 
> > elfcorehdr=<addr>[KMG],<size>[KMG]
> 
> I think it could be memap= style. elfcorehdr=X[KMG]@Y[KMG]. Though to
> support backward compatibility we will have to support old format of
> plain elfcorehdr=X too.

Ok, fine. I will add a patch for that.

Michael