b1f6aee5b6
Add a test for UFFDIO_MOVE ioctl operating on a hugepage which has to be split because destination is marked with MADV_NOHUGEPAGE. With this we cover all 3 cases: normal page move, hugepage move, hugepage splitting before move. Link: https://lkml.kernel.org/r/20231230025636.2477429-1-surenb@google.com Signed-off-by: Suren Baghdasaryan <surenb@google.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Axel Rasmussen <axelrasmussen@google.com> Cc: Brian Geffon <bgeffon@google.com> Cc: Christian Brauner <brauner@kernel.org> Cc: David Hildenbrand <david@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jann Horn <jannh@google.com> Cc: Kalesh Singh <kaleshsingh@google.com> Cc: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Lokesh Gidra <lokeshgidra@google.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Nicolas Geoffray <ngeoffray@google.com> Cc: Peter Xu <peterx@redhat.com> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Shuah Khan <shuah@kernel.org> Cc: ZhangPeng <zhangpeng362@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> (cherry picked from commit a5b7620bab81f16e8bbb04f4aea94c4c7feb0d77) Conflicts: tools/testing/selftests/mm/uffd-unit-tests.c tools/testing/selftests/vm/userfaultfd.c 1. Add request_src_hugepages() to enable THP on src 2. Add madvise() to enable THP on dst in request_hugepages() 3. Add request_split_hugepages() to enable THP on src and disable on dst 4. Change return type of uffd_move_pmd_split_test() to int Bug: 274911254 Bug: 339845931 Signed-off-by: Lokesh Gidra <lokeshgidra@google.com> (cherry picked from https://android-review.googlesource.com/q/commit:51eab7ecc4e9ef7628b098ed69ad63aa4c4b6e1b) Merged-In: I21147a5b7f3e8bbe2befa8bff536e62826e9f6e3 Change-Id: I21147a5b7f3e8bbe2befa8bff536e62826e9f6e3 |
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