From: David Hildenbrand <david@redhat.com>
To: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org
Subject: Re: [PATCH 1/9] mm: Convert ksm_might_need_to_copy() to work on folios
Date: Tue, 12 Dec 2023 13:32:50 +0100 [thread overview]
Message-ID: <c5d7295d-3486-46e2-9979-fe756076561b@redhat.com> (raw)
In-Reply-To: <20231211162214.2146080-2-willy@infradead.org>
> +++ b/mm/swapfile.c
> @@ -1749,11 +1749,13 @@ static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd,
> int ret = 1;
>
> swapcache = page;
> - page = ksm_might_need_to_copy(page, vma, addr);
> - if (unlikely(!page))
> + folio = ksm_might_need_to_copy(folio, vma, addr);
> + if (unlikely(!folio))
> return -ENOMEM;
> - else if (unlikely(PTR_ERR(page) == -EHWPOISON))
> + else if (unlikely(folio == ERR_PTR(-EHWPOISON)))
> hwpoisoned = true;
> + else
> + page = folio_file_page(folio, swp_offset(entry));
Just to double-check:
assuming ksm_might_need_to_copy() in fact allocated a fresh (order-0)
folio, folio_file_page() will simply translate to "folio_page(folio, 0)"
and should be fine.
--
Cheers,
David / dhildenb
next prev parent reply other threads:[~2023-12-12 12:32 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-11 16:22 [PATCH 0/9] Finish two folio conversions Matthew Wilcox (Oracle)
2023-12-11 16:22 ` [PATCH 1/9] mm: Convert ksm_might_need_to_copy() to work on folios Matthew Wilcox (Oracle)
2023-12-12 12:32 ` David Hildenbrand [this message]
2023-12-12 12:43 ` Matthew Wilcox
2023-12-12 12:43 ` David Hildenbrand
2023-12-11 16:22 ` [PATCH 2/9] mm: Simplify the assertions in unuse_pte() Matthew Wilcox (Oracle)
2023-12-12 12:26 ` David Hildenbrand
2023-12-12 13:52 ` Matthew Wilcox
2023-12-12 13:55 ` David Hildenbrand
2023-12-11 16:22 ` [PATCH 3/9] mm: Convert unuse_pte() to use a folio throughout Matthew Wilcox (Oracle)
2023-12-11 16:22 ` [PATCH 4/9] mm: Remove some calls to page_add_new_anon_rmap() Matthew Wilcox (Oracle)
2023-12-12 13:20 ` David Hildenbrand
2023-12-11 16:22 ` [PATCH 5/9] mm: Remove stale example from comment Matthew Wilcox (Oracle)
2023-12-12 13:20 ` David Hildenbrand
2023-12-11 16:22 ` [PATCH 6/9] mm: Remove references to page_add_new_anon_rmap in comments Matthew Wilcox (Oracle)
2023-12-12 13:20 ` David Hildenbrand
2023-12-11 16:22 ` [PATCH 7/9] mm: Convert migrate_vma_insert_page() to use a folio Matthew Wilcox (Oracle)
2023-12-11 22:17 ` Alistair Popple
2023-12-12 13:21 ` David Hildenbrand
2023-12-11 16:22 ` [PATCH 8/9] mm: Convert collapse_huge_page() " Matthew Wilcox (Oracle)
2023-12-12 13:21 ` David Hildenbrand
2023-12-11 16:22 ` [PATCH 9/9] mm: Remove page_add_new_anon_rmap and lru_cache_add_inactive_or_unevictable Matthew Wilcox (Oracle)
2023-12-12 13:21 ` David Hildenbrand
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