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760aee0b71
Add a test suite (with 10 more sub-tests) to cover RO pinning against fork() over uffd-wp. It covers both: (1) Early CoW test in fork() when page pinned, (2) page unshare due to RO longterm pin. They are: Testing wp-fork-pin on anon... done Testing wp-fork-pin on shmem... done Testing wp-fork-pin on shmem-private... done Testing wp-fork-pin on hugetlb... done Testing wp-fork-pin on hugetlb-private... done Testing wp-fork-pin-with-event on anon... done Testing wp-fork-pin-with-event on shmem... done Testing wp-fork-pin-with-event on shmem-private... done Testing wp-fork-pin-with-event on hugetlb... done Testing wp-fork-pin-with-event on hugetlb-private... done CONFIG_GUP_TEST needed or they'll be skipped. Testing wp-fork-pin on anon... skipped [reason: Possibly CONFIG_GUP_TEST missing or unprivileged] Note that the major test goal is on private memory, but no hurt to also run all of them over shared because shared memory should work the same. Link: https://lkml.kernel.org/r/20230417195317.898696-7-peterx@redhat.com Signed-off-by: Peter Xu <peterx@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Axel Rasmussen <axelrasmussen@google.com> Cc: David Hildenbrand <david@redhat.com> Cc: Mika Penttilä <mpenttil@redhat.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Nadav Amit <nadav.amit@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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