linux-kernel - Re: [PATCH] x86, kdump: Set crashkernel

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Message-ID: <CAE9FiQUxmipKJfUsZdN+J6wGR66VKfLQ8+z41yd3TCJxXTyDRA@mail.gmail.com>
Date:	Mon, 11 Mar 2013 12:34:00 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>,
	WANG Chao <chaowang@...hat.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86, kdump: Set crashkernel_low automatically

On Mon, Mar 11, 2013 at 12:10 PM, Vivek Goyal <vgoyal@...hat.com> wrote:
> Not breaking existing cases makes sense to me.

that is -v2 version:
try 896M, then try 4G, than MAXMEM.

> May be we should use
> a new parameter crashkernel_high to force memory reservation above
> 4G and crashkernel=X continues to reserve memory at lower addresses
> and remains backward compatible.

No need to use crashkernel_high, we can just cashkernel=X@Y instead.

Thanks

Yinghai
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