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Date:   Tue, 16 May 2023 11:59:07 +0000
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From:   "Yajun Deng" <yajun.deng@linux.dev>
Message-ID: <3509bcc597e37616cf45247e8f92d369@linux.dev>
Subject: Re: [PATCH] EDAC: Expose node link in sysfs if CONFIG_NUMA
To:     "Borislav Petkov" <bp@alien8.de>
Cc:     tony.luck@intel.com, james.morse@arm.com, mchehab@kernel.org,
        rric@kernel.org, corbet@lwn.net, linux-kernel@vger.kernel.org,
        linux-edac@vger.kernel.org, linux-doc@vger.kernel.org
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References: <20230516111942.GCZGNmzu3Abd4KmZu3@fat_crate.local>
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 <20230516080748.3155788-1-yajun.deng@linux.dev>
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May 16, 2023 7:19 PM, "Borislav Petkov" <bp@alien8.de> wrote:=0A=0A> On T=
ue, May 16, 2023 at 11:07:11AM +0000, Yajun Deng wrote:=0A> =0A>> It will=
 help users to confirm which MC belongs to which node if there=0A>> are m=
ultiple MCs. Therefore, we can also know how many dimm on each=0A>> node.=
=0A> =0A> There are physical nodes, logical nodes, NUMA nodes, interleavi=
ng=0A> between nodes...=0A> =0A=0ANode is the NUMA node, We get the numa =
id by calling dev_to_node().=0A=0A> Is there any practical use case and n=
eed behind this?=0A>=0A=0ASome dimm may not be recognized when boot, we w=
ant to find it.=0A=0AThe '/sys/devices/system/node/node0/meminfo' would s=
how the memory on=0Anode0.=0A=0AIf we have '/sys/devices/system/node/node=
0/mc0', by comparing the number=0Aof dimm and MemTotal in meminfo. It is =
easy to know that the dimm didn't =0Arecognized whether it belonged to th=
is NUMA node or not.=0A=0A =0A> --=0A> Regards/Gruss,=0A> Boris.=0A> =0A>=
 https://people.kernel.org/tglx/notes-about-netiquette