linux-kernel - Re: [PATCH v3 3/4] x86, kdump: Change crashkernel

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Message-ID: <20130409202948.GQ6320@redhat.com>
Date:	Tue, 9 Apr 2013 16:29:48 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Yinghai Lu <yinghai@...nel.org>,
	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 v3 3/4] x86, kdump: Change crashkernel_high/low= to
 crashkernel=;high/low

On Tue, Apr 09, 2013 at 01:24:46PM -0700, H. Peter Anvin wrote:
> On 04/09/2013 01:05 PM, Yinghai Lu wrote:
> >>
> >> So crashkernel=X@Y;high is a valid syntax? Looks like we will reserve
> >> X amount of RAM at base Y and ignore "high" or "low".
> > 
> > yes, we should reject them.
> > 
> 
> What if there isn't X amount of RAM available at base Y?

We don't reserve anything.

In this context crashkernel=X@Y,high is invalid syntax and should probably
be ignored by parser. The very fact user specified the offset, high or
low option does not carry any meaning.

crashkernel=X,high is valid though.

Thanks
Vivek
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