linux-kernel - Re: [PATCH v3] huge_memory: return -EINVAL in folio split functions when THP is disabled

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Message-ID: <CAGsJ_4y_=m9hNBjsT9WEn4UDJtOsjiRworATAxes+MGcjQ21zg@mail.gmail.com>
Date: Sat, 6 Sep 2025 03:07:12 +0800
From: Barry Song <21cnbao@...il.com>
To: "Pankaj Raghav (Samsung)" <kernel@...kajraghav.com>
Cc: Matthew Wilcox <willy@...radead.org>, David Hildenbrand <david@...hat.com>, 
	Ryan Roberts <ryan.roberts@....com>, Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, 
	Baolin Wang <baolin.wang@...ux.alibaba.com>, Dev Jain <dev.jain@....com>, 
	Andrew Morton <akpm@...ux-foundation.org>, Nico Pache <npache@...hat.com>, Zi Yan <ziy@...dia.com>, 
	"Liam R . Howlett" <Liam.Howlett@...cle.com>, linux-kernel@...r.kernel.org, linux-mm@...ck.org, 
	mcgrof@...nel.org, gost.dev@...sung.com, Pankaj Raghav <p.raghav@...sung.com>, 
	Kiryl Shutsemau <kas@...nel.org>, kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v3] huge_memory: return -EINVAL in folio split functions
 when THP is disabled

On Fri, Sep 5, 2025 at 10:57 PM Pankaj Raghav (Samsung)
<kernel@...kajraghav.com> wrote:
>
> On Fri, Sep 05, 2025 at 02:53:04PM +0100, Matthew Wilcox wrote:
> > On Fri, Sep 05, 2025 at 03:13:52PM +0200, Pankaj Raghav (Samsung) wrote:
> > > Changes since v2:
> > >   - use page_folio(page) directly in VM_WARN_ON_ONCE_FOLIO
> >
> > ... why not use VM_WARN_ON_ONCE_PAGE?
> No idea how I missed that!

With this,

Reviewed-by: Barry Song <baohua@...nel.org>

Thanks
Barry