Re: [PATCHv7] x86/kdump: bugfix, make the behavior of crashkernel=X consistent with kaslr

From: Borislav Petkov
Date: Thu Jan 31 2019 - 05:57:39 EST

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.


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