From: Matthew Wilcox <willy@infradead.org>
To: David Hildenbrand <david@redhat.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Andrew Morton <akpm@linux-foundation.org>,
Mike Kravetz <mike.kravetz@oracle.com>,
Muchun Song <muchun.song@linux.dev>
Subject: Re: [PATCH v1 2/6] mm/rmap: move SetPageAnonExclusive out of __page_set_anon_rmap()
Date: Wed, 13 Sep 2023 15:32:09 +0100 [thread overview]
Message-ID: <ZQHH6ZC9aHQaqlNJ@casper.infradead.org> (raw)
In-Reply-To: <20230913125113.313322-3-david@redhat.com>
On Wed, Sep 13, 2023 at 02:51:09PM +0200, David Hildenbrand wrote:
> @@ -1246,11 +1241,13 @@ void page_add_anon_rmap(struct page *page, struct vm_area_struct *vma,
>
> if (likely(!folio_test_ksm(folio))) {
> if (first)
> - __page_set_anon_rmap(folio, page, vma, address,
> - !!(flags & RMAP_EXCLUSIVE));
> + __folio_set_anon(folio, vma, address,
> + !!(flags & RMAP_EXCLUSIVE));
> else
> __page_check_anon_rmap(folio, page, vma, address);
> }
> + if (flags & RMAP_EXCLUSIVE)
> + SetPageAnonExclusive(page);
Won't we end up setting AnonExclusive on ksm pages, or do we make sure
to never pass RMAP_EXCLUSIVE for ksm pages?
Maybe better to move these last two lines inside the previous test,
just to avoid the question.
next prev parent reply other threads:[~2023-09-13 14:32 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-13 12:51 [PATCH v1 0/6] Anon rmap cleanups David Hildenbrand
2023-09-13 12:51 ` [PATCH v1 1/6] mm/rmap: drop stale comment in page_add_anon_rmap and hugepage_add_anon_rmap() David Hildenbrand
2023-09-13 12:51 ` [PATCH v1 2/6] mm/rmap: move SetPageAnonExclusive out of __page_set_anon_rmap() David Hildenbrand
2023-09-13 14:32 ` Matthew Wilcox [this message]
2023-09-13 14:34 ` David Hildenbrand
2023-09-13 12:51 ` [PATCH v1 3/6] mm/rmap: move folio_test_anon() check out of __folio_set_anon() David Hildenbrand
2023-09-13 12:51 ` [PATCH v1 4/6] mm/rmap: warn on new PTE-mapped folios in page_add_anon_rmap() David Hildenbrand
2023-09-13 12:51 ` [PATCH v1 5/6] mm/rmap: simplify PageAnonExclusive sanity checks when adding anon rmap David Hildenbrand
2023-09-18 9:59 ` David Hildenbrand
2023-09-13 12:51 ` [PATCH v1 6/6] mm/rmap: pass folio to hugepage_add_anon_rmap() David Hildenbrand
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