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From: "David Hildenbrand (Arm)" <david@kernel.org>
To: "Lorenzo Stoakes (Oracle)" <ljs@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>
Cc: Zi Yan <ziy@nvidia.com>,
	Baolin Wang <baolin.wang@linux.alibaba.com>,
	"Liam R . Howlett" <Liam.Howlett@oracle.com>,
	Nico Pache <npache@redhat.com>,
	Ryan Roberts <ryan.roberts@arm.com>, Dev Jain <dev.jain@arm.com>,
	Barry Song <baohua@kernel.org>, Lance Yang <lance.yang@linux.dev>,
	Vlastimil Babka <vbabka@kernel.org>,
	Mike Rapoport <rppt@kernel.org>,
	Suren Baghdasaryan <surenb@google.com>,
	Michal Hocko <mhocko@suse.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/8] mm/huge_memory: simplify vma_is_specal_huge()
Date: Wed, 18 Mar 2026 21:45:31 +0100	[thread overview]
Message-ID: <5ce0932d-e8d7-4f0b-acb2-12be43a035e1@kernel.org> (raw)
In-Reply-To: <84712e37721c557f887e4a405759be31a4961100.1773865827.git.ljs@kernel.org>

> +++ b/mm/huge_memory.c
> @@ -100,6 +100,14 @@ static inline bool file_thp_enabled(struct vm_area_struct *vma)
>  	return !inode_is_open_for_write(inode) && S_ISREG(inode->i_mode);
>  }
>  
> +/* If returns true, we are unable to access the VMA's folios. */
> +static bool vma_is_special_huge(struct vm_area_struct *vma)
> +{
> +	if (vma_is_dax(vma))
> +		return false;
> +	return vma_test_any(vma, VMA_PFNMAP_BIT, VMA_MIXEDMAP_BIT);
> +}

I was hoping that we could make this whole code look more like PTE code
by using vm_normal_page_pmd() ... :)

-- 
Cheers,

David


  reply	other threads:[~2026-03-18 20:45 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-18 20:39 [PATCH 0/8] mm/huge_memory: refactor zap_huge_pmd() Lorenzo Stoakes (Oracle)
2026-03-18 20:39 ` [PATCH 1/8] mm/huge_memory: simplify vma_is_specal_huge() Lorenzo Stoakes (Oracle)
2026-03-18 20:45   ` David Hildenbrand (Arm) [this message]
2026-03-19 10:34     ` Lorenzo Stoakes (Oracle)
2026-03-19 13:03       ` David Hildenbrand (Arm)
2026-03-19 14:07         ` Lorenzo Stoakes (Oracle)
2026-03-19  3:16   ` Qi Zheng
2026-03-19 10:39     ` Lorenzo Stoakes (Oracle)
2026-03-18 20:39 ` [PATCH 2/8] mm/huge: avoid big else branch in zap_huge_pmd() Lorenzo Stoakes (Oracle)
2026-03-19  3:26   ` Qi Zheng
2026-03-19  6:38   ` Baolin Wang
2026-03-18 20:39 ` [PATCH 3/8] mm/huge_memory: have zap_huge_pmd return a boolean, add kdoc Lorenzo Stoakes (Oracle)
2026-03-19  3:29   ` Qi Zheng
2026-03-19  6:41   ` Baolin Wang
2026-03-18 20:39 ` [PATCH 4/8] mm/huge_memory: handle buggy PMD entry in zap_huge_pmd() Lorenzo Stoakes (Oracle)
2026-03-19  7:00   ` Baolin Wang
2026-03-19 10:58     ` Lorenzo Stoakes (Oracle)
2026-03-18 20:39 ` [PATCH 5/8] mm/huge_memory: add a common exit path to zap_huge_pmd() Lorenzo Stoakes (Oracle)
2026-03-18 20:39 ` [PATCH 6/8] mm/huge_memory: remove unnecessary VM_BUG_ON_PAGE() Lorenzo Stoakes (Oracle)
2026-03-19  7:12   ` Baolin Wang
2026-03-18 20:39 ` [PATCH 7/8] mm/huge_memory: deduplicate zap deposited table call Lorenzo Stoakes (Oracle)
2026-03-18 20:39 ` [PATCH 8/8] mm/huge_memory: deduplicate zap_huge_pmd() further by tracking state Lorenzo Stoakes (Oracle)

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