linux-kernel - Re: [PATCH v2] mm: numa_memblks: introduce numa_add_reserved

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Message-ID: <aBt6hihp4m3fbd02@kernel.org>
Date: Wed, 7 May 2025 18:21:42 +0300
From: Mike Rapoport <rppt@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Yuquan Wang <wangyuquan1236@...tium.com.cn>,
	Jonathan.Cameron@...wei.com, dan.j.williams@...el.com,
	rafael@...nel.org, lenb@...nel.org, alison.schofield@...el.com,
	rrichter@....com, bfaccini@...dia.com, haibo1.xu@...el.com,
	david@...hat.com, chenhuacai@...nel.org, linux-cxl@...r.kernel.org,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, chenbaozi@...tium.com.cn,
	loongarch@...ts.linux.dev
Subject: Re: [PATCH v2] mm: numa_memblks: introduce numa_add_reserved_memblk

On Tue, May 06, 2025 at 06:55:44PM -0700, Andrew Morton wrote:
> On Tue,  6 May 2025 14:22:45 +0800 Yuquan Wang <wangyuquan1236@...tium.com.cn> wrote:
> 
> > acpi_parse_cfmws() currently adds empty CFMWS ranges to numa_meminfo
> > with the expectation that numa_cleanup_meminfo moves them to
> > numa_reserved_meminfo. There is no need for that indirection when it is
> > known in advance that these unpopulated ranges are meant for
> > numa_reserved_meminfo in support of future hotplug / CXL provisioning.
> > 
> > Introduce and use numa_add_reserved_memblk() to add the empty CFMWS
> > ranges directly.
> > 
> > Signed-off-by: Yuquan Wang <wangyuquan1236@...tium.com.cn>
> > ---
> > 
> > Changes in v2 (Thanks to Dan & Alison):
> > - Use numa_add_reserved_memblk() to replace numa_add_memblk() in acpi_parse_cfmws()
> > - Add comments to describe the usage of numa_add_reserved_memblk()
> > - Updating the commit message to clarify the purpose of the patch
> > 
> > By the way, "LoongArch: Introduce the numa_memblks conversion" is in linux-next.
> 
> So is this patch dependent upon "LoongArch: Introduce the numa_memblks
> conversion"?

Yes, the previous version of this patch failed to build on loongarch.

-- 
Sincerely yours,
Mike.