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Date: Thu, 10 Jan 2013 12:01:47 -0500
From: Vivek Goyal <vgoyal@redhat.com>
Subject: Re: [PATCH] Only reset e820 once, even with multiple memmap=exactmap
 params
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To: Yinghai Lu <yinghai@kernel.org>
Cc: horms@verge.net.au, Takao Indoh <indou.takao@jp.fujitsu.com>, MUNEDA Takahiro <muneda.takahiro@jp.fujitsu.com>, tokunaga.keiich@jp.fujitsu.com, linux-pci@vger.kernel.org, x86@kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, hbabu@us.ibm.com, andi@firstfloor.org, ddutile@redhat.com, ishii.hironobu@jp.fujitsu.com, hpa@zytor.com, bhelgaas@google.com, tglx@linutronix.de, mingo@redhat.com, Thomas Renninger <trenn@suse.de>, khalid@gonehiking.org

On Thu, Jan 10, 2013 at 08:53:18AM -0800, Yinghai Lu wrote:
> On Thu, Jan 10, 2013 at 6:26 AM, Vivek Goyal <vgoyal@redhat.com> wrote:
> >
> > This happens only in case of kdump and not kexec. In case of kdump
> > we want second kernel to use only selected memory areas.
> >
> > In fact this is one improvement area. Instead of using memmap= entries
> > in kdump case, we should probably modify the e820 map passed in
> > zero page and get rid of memmap= entries.
> 
> then how the kdump kernel get saved_max_pfn?
> 

Oh, I forgot about that. May be we can pass saved_max_pfn on command line
instead of passing all memmap= entries.

Thanks
Vivek

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