memory: move exclusivity detection in do_wp_page() into wp_can_reuse_anon_folio()

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Let's clean up do_wp_page() a bit, removing two labels and making it a
easier to read.

wp_can_reuse_anon_folio() now only operates on the whole folio.  Move the
SetPageAnonExclusive() out into do_wp_page().  No need to do this under
page lock -- the page table lock is sufficient.

Link: https://lkml.kernel.org/r/20231002142949.235104-4-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

...

This commit is contained in:

David Hildenbrand 2023-10-02 16:29:49 +02:00 • committed by Andrew Morton

parent 069686255c

commit dec078cc21

1 changed files with 45 additions and 43 deletions

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mm/memory.c

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