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Date: Mon, 18 Nov 2013 10:42:09 -0500
From: Vivek Goyal <vgoyal@redhat.com>
To: jerry.hoemann@hp.com
Cc: Ingo Molnar <mingo@kernel.org>, Pekka Enberg <penberg@kernel.org>,
        "H. Peter Anvin" <hpa@zytor.com>, Rob Landley <rob@landley.net>,
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Subject: Re: [PATCH 0/3] Early use of boot service memory
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On Fri, Nov 15, 2013 at 12:13:08PM -0700, jerry.hoemann@hp.com wrote:

[..]
> > Is it possible to fix it the way hpa suggested?
> 
>   I think the changes to enable ,high is a step in the
>   right direction. its an improvement  But it is still green.
> 
>   We are having lots more problems w/ upstream kdump than we are having
>   w/ the kdump in distros.
> 
>   So, to answer your question with a slight twist:
> 
>   Is it possible to back ports lots of green code across multiple
>   versions and distros and get a bug free user experiences?  I guess so.
> 
>   is it the right way to go?  i personally don't think so.
> 
>   but hey, others may have a different view.

I agree that backporting a fix/hack to not reserve EFI boot memory on
certain platform is much easier as compared to backporting capability to
boot from higher memory addresses.

I also agree that crashkernel=X,high support is very new and it has yet to
go though a wide spread testing to confirm that it works well with wide
variety of machines. And this also makes a case to stick to crashkernel=X
for older releases and just backport a fix to not reserve EFI boot time
memory.

Thanks
Vivek