linux-kernel - Re: [PATCH v8 2/3] mm/rmap: integrate PMD-mapped folio splitting into pagewalk loop

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Message-ID: <24765af3-2f2d-4451-9d9c-c35784ae95c6@redhat.com>
Date: Fri, 14 Jun 2024 09:34:44 +0200
From: David Hildenbrand <david@...hat.com>
To: Lance Yang <ioworker0@...il.com>, akpm@...ux-foundation.org
Cc: willy@...radead.org, sj@...nel.org, baolin.wang@...ux.alibaba.com,
 maskray@...gle.com, ziy@...dia.com, ryan.roberts@....com, 21cnbao@...il.com,
 mhocko@...e.com, fengwei.yin@...el.com, zokeefe@...gle.com,
 shy828301@...il.com, xiehuan09@...il.com, libang.li@...group.com,
 wangkefeng.wang@...wei.com, songmuchun@...edance.com, peterx@...hat.com,
 minchan@...nel.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 2/3] mm/rmap: integrate PMD-mapped folio splitting into
 pagewalk loop

On 14.06.24 03:51, Lance Yang wrote:
> In preparation for supporting try_to_unmap_one() to unmap PMD-mapped
> folios, start the pagewalk first, then call split_huge_pmd_address() to
> split the folio.
> 
> Suggested-by: David Hildenbrand <david@...hat.com>
> Suggested-by: Baolin Wang <baolin.wang@...ux.alibaba.com>
> Signed-off-by: Lance Yang <ioworker0@...il.com>
> ---

Would have converted that VM_BUG_ON to a VM_WARN_ON_ONCE, but it's just 
moving code, so no big deal.

Thanks!

Acked-by: David Hildenbrand <david@...hat.com>

-- 
Cheers,

David / dhildenb