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

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Message-ID: <hfljftvow5dzmkfgh3cjuqmngnmg65o4r4mpp5u34zoixwmdl5@ohnv6bbqavyu>
Date: Fri, 5 Sep 2025 16:57:40 +0200
From: "Pankaj Raghav (Samsung)" <kernel@...kajraghav.com>
To: Matthew Wilcox <willy@...radead.org>
Cc: 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>, Barry Song <baohua@...nel.org>, 
	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 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!

--
Pankaj