linux-kernel - Re: [PATCH 0/5] Add second memory region for crash kernel

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Message-ID: <4BD12E48.3080400@redhat.com>
Date:	Fri, 23 Apr 2010 13:21:12 +0800
From:	Cong Wang <amwang@...hat.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Vivek Goyal <vgoyal@...hat.com>,
	Vitaly Mayatskikh <v.mayatskih@...il.com>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Haren Myneni <hbabu@...ibm.com>,
	Neil Horman <nhorman@...driver.com>, kexec@...ts.infradead.org
Subject: Re: [PATCH 0/5] Add second memory region for crash kernel

Eric W. Biederman wrote:
> Vivek Goyal <vgoyal@...hat.com> writes:
> 
>> Vitaly, have you really run into cases where 2G upper limit is a concern.
>> What is the configuration you have, how much memory it has and how much
>> memory are you planning to reserve for kdump kernel?
> 
> A good question.
> 

We have observed that on a machine which has 66G memory, when we do
crashkernel=1G@4G, kexec failed to load the crash kernel, but the memory
reservation _did_ succeed.

Thanks.
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