From mboxrd@z Thu Jan  1 00:00:00 1970
Return-path: <kexec-bounces+dwmw2=infradead.org@lists.infradead.org>
Received: from mail.skyhub.de ([2a01:4f8:190:11c2::b:1457])
 by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux))
 id 1gpA2M-00087q-9G
 for kexec@lists.infradead.org; Thu, 31 Jan 2019 10:57:39 +0000
Date: Thu, 31 Jan 2019 11:57:32 +0100
From: Borislav Petkov <bp@alien8.de>
Subject: Re: [PATCHv7] x86/kdump: bugfix, make the behavior of crashkernel=X
 consistent with kaslr
Message-ID: <20190131105732.GC6749@zn.tnic>
References: <1548047768-7656-1-git-send-email-kernelfans@gmail.com>
 <20190125103924.GB27998@zn.tnic>
 <20190125134518.GA23595@dhcp-128-65.nay.redhat.com>
 <20190125140823.GC27998@zn.tnic>
 <20190131075907.GB19091@dhcp-128-65.nay.redhat.com>
MIME-Version: 1.0
Content-Disposition: inline
In-Reply-To: <20190131075907.GB19091@dhcp-128-65.nay.redhat.com>
List-Id: <kexec.lists.infradead.org>
List-Unsubscribe: <http://lists.infradead.org/mailman/options/kexec>,
 <mailto:kexec-request@lists.infradead.org?subject=unsubscribe>
List-Archive: <http://lists.infradead.org/pipermail/kexec/>
List-Post: <mailto:kexec@lists.infradead.org>
List-Help: <mailto:kexec-request@lists.infradead.org?subject=help>
List-Subscribe: <http://lists.infradead.org/mailman/listinfo/kexec>,
 <mailto:kexec-request@lists.infradead.org?subject=subscribe>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Sender: "kexec" <kexec-bounces@lists.infradead.org>
Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org
To: Dave Young <dyoung@redhat.com>
Cc: x86@kernel.org, Baoquan He <bhe@redhat.com>, Randy Dunlap <rdunlap@infradead.org>, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, Pingfan Liu <kernelfans@gmail.com>, Mike Rapoport <rppt@linux.vnet.ibm.com>, Andrew Morton <akpm@linux-foundation.org>, yinghai@kernel.org, vgoyal@redhat.com

On Thu, Jan 31, 2019 at 03:59:07PM +0800, Dave Young wrote:
> As Pingfan/me mentioned in another reply, there are two reasons:
> 1. old kexec-tools can not load kernel to high memory
> 2. ,high will not work on some systems without some amounts of low
> memory so it nees reserve extra low memory, it is bad for people who do
> not want it.

Let's see: we don't enable high by default because of old kexec-tools
and some systems which do some funky reservations.

But this patch kinda enables high by trying a couple more regions.

So we don't really need this - we simply need to tell people to use high
if it fails with KASLR, AFAICT.

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.

_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec