linux-kernel - Re: [PATCH v1 13/36] mm/hugetlb: cleanup hugetlb_folio_init_tail

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Message-ID: <6552e67b-72fd-4d9e-bf35-872cbfae5de0@lucifer.local>
Date: Fri, 29 Aug 2025 13:02:38 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: David Hildenbrand <david@...hat.com>
Cc: linux-kernel@...r.kernel.org, Alexander Potapenko <glider@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Brendan Jackman <jackmanb@...gle.com>,
        Christoph Lameter <cl@...two.org>, Dennis Zhou <dennis@...nel.org>,
        Dmitry Vyukov <dvyukov@...gle.com>, dri-devel@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org, iommu@...ts.linux.dev,
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        Jens Axboe <axboe@...nel.dk>, Johannes Weiner <hannes@...xchg.org>,
        John Hubbard <jhubbard@...dia.com>, kasan-dev@...glegroups.com,
        kvm@...r.kernel.org, "Liam R. Howlett" <Liam.Howlett@...cle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
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        Michal Hocko <mhocko@...e.com>, Mike Rapoport <rppt@...nel.org>,
        Muchun Song <muchun.song@...ux.dev>, netdev@...r.kernel.org,
        Oscar Salvador <osalvador@...e.de>, Peter Xu <peterx@...hat.com>,
        Robin Murphy <robin.murphy@....com>,
        Suren Baghdasaryan <surenb@...gle.com>, Tejun Heo <tj@...nel.org>,
        virtualization@...ts.linux.dev, Vlastimil Babka <vbabka@...e.cz>,
        wireguard@...ts.zx2c4.com, x86@...nel.org, Zi Yan <ziy@...dia.com>
Subject: Re: [PATCH v1 13/36] mm/hugetlb: cleanup
 hugetlb_folio_init_tail_vmemmap()

On Fri, Aug 29, 2025 at 01:59:19PM +0200, David Hildenbrand wrote:
> On 28.08.25 17:37, Lorenzo Stoakes wrote:
> > On Thu, Aug 28, 2025 at 12:01:17AM +0200, David Hildenbrand wrote:
> > > We can now safely iterate over all pages in a folio, so no need for the
> > > pfn_to_page().
> > >
> > > Also, as we already force the refcount in __init_single_page() to 1,
> >
> > Mega huge nit (ignore if you want), but maybe worth saying 'via
> > init_page_count()'.
>
> Will add, thanks!

Thanks!

>
> --
> Cheers
>
> David / dhildenb
>
>