From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3FA4D36F42B for ; Tue, 16 Jun 2026 14:10:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781619060; cv=none; b=BBh2IDSYV9biJ117nszcAGgJ6wkVKdTNMauwW3BNROr43YHRQwhxq1B5QSHFm9P5gr/cO7F79Ip9X3eE1ELRT4cgxXbR2cBIo8EPij//YhHzafOW2u0mZFENCSC+k36h6rtyCYe3pzJggcsyM4lEKL3G1/mUatpH5++pqn+RA7M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781619060; c=relaxed/simple; bh=ydhfolobygBnmRU4JhyDrTu++C3QoadWWKSMEdpd3Sg=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=RF7gbGBvY6G8Yo91nHs68lsDRRX91zCF/mjCeqkAEtF49a/2p1Mj8BStgX/NAUdyJGsyWSQlKHsmG5FzGlJZibIHDMJnTej24f08w0qNQcsRajuQGD7RC2SZcgvUiCmvMRXegb7PjOcbkRWwwmNk715hG/JMRBdQGYJ9tiAhQok= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GQaOTTvR; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="GQaOTTvR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AFEE51F000E9; Tue, 16 Jun 2026 14:10:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781619059; bh=P0SwEZ3tknfn6psRl8TQLDqLaB5btYhZHARnB/2ZNo8=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=GQaOTTvRFDrlt5jHrIBBRWfZc8cIiUzOBQ+t3bLwly1QaxZlzHO9aYxYJ3tH0E04P Ro774mgT4J0aqVjuzDnwMeLv66dHXFqsolpfb9FGtULchsi5zWi69jP0OStFvMcuZE vrBp8Am0cnURrdK04N1eBa8PIecvuoCzDxeCIEk5oxHXJRyQVV8P8sEFA9YTORWiQW MeG4QYkBil7+owvkK0JbvWypvDNxlw4ehq8B3pQcak9ndNTDVo9xc+iBG54QUjxU/Q 0S5Y6odT5at6XB0bQ7dDHMn1UmWg3XYXC+9mVxqecz7Zud7/H4FnpFZFMjlsimFoIq eROaMQO3wP++g== Message-ID: <645a5246-0f9b-4b93-9483-e6bba35f037b@kernel.org> Date: Tue, 16 Jun 2026 16:10:52 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 10/12] mm/rmap: refactor anon folio unmap in try_to_unmap_one To: Dev Jain , akpm@linux-foundation.org, ljs@kernel.org, chrisl@kernel.org, kasong@tencent.com, hughd@google.com, liam@infradead.org Cc: riel@surriel.com, vbabka@kernel.org, harry@kernel.org, jannh@google.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, qi.zheng@linux.dev, shakeel.butt@linux.dev, baohua@kernel.org, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, shikemeng@huaweicloud.com, nphamcs@gmail.com, bhe@redhat.com, youngjun.park@lge.com, baolin.wang@linux.alibaba.com, pfalcato@suse.de, ryan.roberts@arm.com, anshuman.khandual@arm.com References: <20260526063635.61721-1-dev.jain@arm.com> <20260526063635.61721-11-dev.jain@arm.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 5/26/26 08:36, Dev Jain wrote: > Refactor anonymous folio unmap to ttu_anon_folio. Given that the !folio_test_swapbacked() case remains in the caller, should we make it clearer and call it ttu_anon_swapbacked_folio() Or alternatively, factor complete anon folio handling out (incl. lazyfree handling)? > > No functional change intended. > > Signed-off-by: Dev Jain > --- > mm/rmap.c | 116 ++++++++++++++++++++++++++++++++---------------------- > 1 file changed, 68 insertions(+), 48 deletions(-) > > diff --git a/mm/rmap.c b/mm/rmap.c > index c0e385882f562..b1639bad8e27f 100644 > --- a/mm/rmap.c > +++ b/mm/rmap.c > @@ -2136,6 +2136,70 @@ static inline bool ttu_lazyfree_folio(struct vm_area_struct *vma, > return true; > } > > +static inline void set_swp_pte_at(struct mm_struct *mm, unsigned long address, > + pte_t *ptep, swp_entry_t entry, pte_t pteval, bool anon_exclusive) > +{ > + pte_t swp_pte = swp_entry_to_pte(entry); > + > + if (anon_exclusive) > + swp_pte = pte_swp_mkexclusive(swp_pte); > + > + if (likely(pte_present(pteval))) { > + if (pte_soft_dirty(pteval)) > + swp_pte = pte_swp_mksoft_dirty(swp_pte); > + if (pte_uffd_wp(pteval)) > + swp_pte = pte_swp_mkuffd_wp(swp_pte); > + } else { > + /* Device-exclusive entry */ > + if (pte_swp_soft_dirty(pteval)) > + swp_pte = pte_swp_mksoft_dirty(swp_pte); > + if (pte_swp_uffd_wp(pteval)) > + swp_pte = pte_swp_mkuffd_wp(swp_pte); > + } > + > + set_pte_at(mm, address, ptep, swp_pte); > +} > + > +static inline bool ttu_anon_folio(struct vm_area_struct *vma, struct folio *folio, > + struct page *subpage, unsigned long address, pte_t *ptep, > + pte_t pteval) > +{ > + bool anon_exclusive = folio_test_anon(folio) && PageAnonExclusive(subpage); "subpage" ;) Can be const. [...] > } else { > /* > * This is a locked file-backed folio, Happy to see that function shrink a bit ... -- Cheers, David