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

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Message-ID: <20130402155050.GH29506@redhat.com>
Date:	Tue, 2 Apr 2013 11:50:50 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Yinghai Lu <yinghai@...nel.org>
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 02, 2013 at 08:46:16AM -0700, Yinghai Lu wrote:
> 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.

Ok, then description in kernel-parameters.txt is wrong.

+	crashkernel_high=size[KMG]
+                       [KNL, x86_64] range above 4G. kernel allocate
physical
+                       memory region above 4G.


Can you please inline your patches. Otherwise how one is supposed to give
review comments?

Thanks
Vivek
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