linux-kernel - Re: [PATCH] kexec: use Crash kernel for Crash kernel low

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Message-ID: <CAE9FiQU99i+fBLnCq72c17XTALdsuUS5jrANAbL=1aMm7=mahw@mail.gmail.com>
Date:	Tue, 2 Apr 2013 08:46:16 -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@...e.hu>, WANG Chao <chaowang@...hat.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kexec: use Crash kernel for Crash kernel low

On Tue, Apr 2, 2013 at 8:39 AM, Vivek Goyal <vgoyal@...hat.com> wrote:
> On Tue, Apr 02, 2013 at 07:45:36AM -0700, Yinghai Lu wrote:
>
> [..]
>> 2. keep thing unified when new kexec-tools is used: always high.
>
> I think this is wrong. What if system does not have more than 4G of
> memory. crashkernel=x,high will fail. So just because we have new version
> of kexec-tools, it does not mean that one can always use crashkernel=x,high.

no, it will not fail.

If the system have less 4G, and memblock will still find the ram for us.

Thanks

Yinghai
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