linux-kernel - Re: [PATCH v4 2/2] RISC-V: Implement sparsemem

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Date:   Wed, 31 Jul 2019 11:07:34 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     Greentime Hu <green.hu@...il.com>, greentime.hu@...ive.com,
        paul.walmsley@...ive.com
Cc:     Rob Herring <robh@...nel.org>, Albert Ou <aou@...s.berkeley.edu>,
        Andrew Waterman <andrew@...ive.com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Stephen Bates <sbates@...thlin.com>,
        Zong Li <zong@...estech.com>, Olof Johansson <olof@...om.net>,
        linux-riscv@...ts.infradead.org,
        Michael Clark <michaeljclark@....com>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH v4 2/2] RISC-V: Implement sparsemem



On 2019-07-31 12:30 a.m., Greentime Hu wrote:
> I look this issue more closely.
> I found it always sets each memblock region to node 0. Does this make sense?
> I am not sure if I understand this correctly. Do you have any idea for
> this? Thank you. :)

Yes, I think this is normal. When we talk about memory nodes we're
talking about NUMA nodes which is unrelated to device tree nodes.

I'm not really sure what's causing the crash. Have you verified it's
this patch that causes it? Is it related to there being a hole in your
memory, does it work if you only have one memory node?

Thanks,

Logan