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Date:   Mon, 25 Feb 2019 10:39:51 +0100
From:   Borislav Petkov <bp@alien8.de>
To:     Pingfan Liu <kernelfans@gmail.com>
Cc:     Joerg Roedel <jroedel@suse.de>, Dave Young <dyoung@redhat.com>,
        Baoquan He <bhe@redhat.com>,
        Jerry Hoemann <jerry.hoemann@hpe.com>, x86@kernel.org,
        Randy Dunlap <rdunlap@infradead.org>,
        kexec@lists.infradead.org, LKML <linux-kernel@vger.kernel.org>,
        Mike Rapoport <rppt@linux.vnet.ibm.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Yinghai Lu <yinghai@kernel.org>, vgoyal@redhat.com,
        iommu@lists.linux-foundation.org, konrad.wilk@oracle.com
Subject: Re: [PATCHv7] x86/kdump: bugfix, make the behavior of crashkernel=X
 consistent with kaslr
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On Sun, Feb 24, 2019 at 09:25:18PM +0800, Pingfan Liu wrote:
> Maybe I misunderstood you, but does "requested range failed" mean that
> user specify the range? If yes, then it should be the duty of user as
> you said later, not the duty of kernel"

No, it should say that it selected a different range only when the user
didn't specify it. Which would mean that the user didn't care about the
range - she/he only wanted to have *any* crashkernel range reserved.
I.e., crashkernel=X invocation.

> We do not know the memory layout of a system, maybe a system with
> memory less than 4GB. So it is better to try all the range of system
> memory.

Ok. If 4G fails, you set high and then try again.

-- 
Regards/Gruss,
    Boris.

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