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

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Message-ID: <CAE9FiQUFaA05-Lujn2U01YDCkUo3tady_ZJxhdEDpfR8sLrXMA@mail.gmail.com>
Date:	Mon, 11 Mar 2013 12:39:56 -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 12:38 PM, Vivek Goyal <vgoyal@...hat.com> wrote:
>> No need to use crashkernel_high, we can just cashkernel=X@Y instead.
>
> crashkernel=X@Y is little different. It assumes user knows the memory
> map and location "Y" is fixed. There might not be any memory at "Y".

then use crashkernel=4G?
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