linux-kernel - Re: [PATCH] NUMA: Early use of cpu_to_node() returns 0 instead of the correct node id

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Message-ID: <169d5a71-8204-4773-a13c-940b4190ed37@amperemail.onmicrosoft.com>
Date: Fri, 19 Jan 2024 15:42:08 +0800
From: Shijie Huang <shijie@...eremail.onmicrosoft.com>
To: Yury Norov <yury.norov@...il.com>,
 Huang Shijie <shijie@...amperecomputing.com>
Cc: gregkh@...uxfoundation.org, patches@...erecomputing.com,
 rafael@...nel.org, paul.walmsley@...ive.com, palmer@...belt.com,
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Subject: Re: [PATCH] NUMA: Early use of cpu_to_node() returns 0 instead of the
 correct node id


在 2024/1/19 12:42, Yury Norov 写道:
> Regardless, I don't think that the approach is correct. As per your
> description, some initialization functions erroneously call
> cpu_to_node() instead of early_cpu_to_node() which exists specifically
> for that case.

I checked the code again.

The sparc, mips and s390 (which support the NUMA) do not support 
early_cpu_to_node().

So we cannot use early_cpu_to_node() for these functions.


Thanks

Huang Shijie