linux-kernel - Re: [PATCH] sparc: Use vmemmap_populate_hugepages for vmemmap

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Message-ID: <aUPvecgVj8XXBcw5@kernel.org>
Date: Thu, 18 Dec 2025 14:11:37 +0200
From: Mike Rapoport <rppt@...nel.org>
To: Tao pilgrim <pilgrimtao@...il.com>
Cc: davem@...emloft.net, andreas@...sler.com, akpm@...ux-foundation.org,
	david@...nel.org, lorenzo.stoakes@...cle.com,
	Liam.Howlett@...cle.com, vbabka@...e.cz, surenb@...gle.com,
	mhocko@...e.com, kevin.brodsky@....com, dave.hansen@...ux.intel.com,
	ziy@...dia.com, chengkaitao@...inos.cn, willy@...radead.org,
	zhengqi.arch@...edance.com, sparclinux@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] sparc: Use vmemmap_populate_hugepages for
 vmemmap_populate

On Thu, Dec 18, 2025 at 07:45:52PM +0800, Tao pilgrim wrote:
> On Thu, Dec 18, 2025 at 7:14 PM Mike Rapoport <rppt@...nel.org> wrote:
> >
> > On Wed, Dec 17, 2025 at 08:08:58PM +0800, chengkaitao wrote:
> > > From: Chengkaitao <chengkaitao@...inos.cn>
> > >
> > > 1. Added the vmemmap_false_pmd function to accommodate architectures
> > > that do not support basepages.
> > > 2. In the SPARC architecture, reimplemented vmemmap_populate using
> > > vmemmap_populate_hugepages.
> >
> > What problem this patch is trying to solve?
> 
> Following the pattern established by other architectures, vmemmap_populate
> is reimplemented using vmemmap_populate_hugepages in the SPARC architecture,
> which fulfills the intended purpose of vmemmap_populate_hugepages.

But what's wrong with the current sparc::vmemmap_populate()?
 
> The functional logic remains unchanged.
> 
> > > Signed-off-by: Chengkaitao <chengkaitao@...inos.cn>
> > > ---
> 
> -- 
> Yours,
> Kaitao Cheng

-- 
Sincerely yours,
Mike.