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Date: Mon, 1 Apr 2013 14:10:44 -0700
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Subject: Re: [PATCH] kexec: use Crash kernel for Crash kernel low
From: Yinghai Lu <yinghai@kernel.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Vivek Goyal <vgoyal@redhat.com>, Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@elte.hu>, WANG Chao <chaowang@redhat.com>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Mon, Apr 1, 2013 at 1:47 PM, H. Peter Anvin <hpa@zytor.com> wrote:
> On 04/01/2013 12:26 PM, Vivek Goyal wrote:
>
>> crashkernel=<size>,<option>,<option>.. and crashkernel=800M,high sound
>> good to me.
>>
>> So atleast for 3.9 kernel, shall we hide new semantics behind
>> crashkernel=XM,high and by default crashkernel=XM tries to emulate
>> crashkernel=XM,low to retain backward compatibility?
>
> Yes, I suspect so.

current we have:
1. crashkernel=XM
2. crashkernel=XM crashkernel_low=YM

so you want to change to
1. crashkernel=XM,low or crashkernel=XM
2. crashkernel=XM,high
3. crashkernel=XM,high crashkernel=YM,low

looks like you change your mind, now you are agreeing on
some could low and some could be high.

Yinghai
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