linux-kernel - Re: [PATCH RFC] mm: madvise: use walk_page_range_vma() for madvise_free_single

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Message-ID: <5cdeb7c8-1f5b-486a-9406-1865f533b246@redhat.com>
Date: Tue, 3 Jun 2025 09:44:16 +0200
From: David Hildenbrand <david@...hat.com>
To: Barry Song <21cnbao@...il.com>, akpm@...ux-foundation.org,
 linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org, Barry Song <v-songbaohua@...o.com>,
 "Liam R. Howlett" <Liam.Howlett@...cle.com>,
 Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 Vlastimil Babka <vbabka@...e.cz>, Jann Horn <jannh@...gle.com>,
 Suren Baghdasaryan <surenb@...gle.com>, Lokesh Gidra
 <lokeshgidra@...gle.com>, Tangquan Zheng <zhengtangquan@...o.com>
Subject: Re: [PATCH RFC] mm: madvise: use walk_page_range_vma() for
 madvise_free_single_vma()

On 03.06.25 03:31, Barry Song wrote:
> From: Barry Song <v-songbaohua@...o.com>
> 
> We've already found the VMA before calling madvise_free_single_vma(),
> so calling walk_page_range() and doing find_vma() again seems
> unnecessary. It also prevents potential optimizations for MADV_FREE
> to use a per-VMA lock.
> 
> Cc: "Liam R. Howlett" <Liam.Howlett@...cle.com>
> Cc: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
> Cc: David Hildenbrand <david@...hat.com>
> Cc: Vlastimil Babka <vbabka@...e.cz>
> Cc: Jann Horn <jannh@...gle.com>
> Cc: Suren Baghdasaryan <surenb@...gle.com>
> Cc: Lokesh Gidra <lokeshgidra@...gle.com>
> Cc: Tangquan Zheng <zhengtangquan@...o.com>
> Signed-off-by: Barry Song <v-songbaohua@...o.com>
> ---

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

-- 
Cheers,

David / dhildenb