The quilt patch titled Subject: selftests/mm: ksm_tests should only MADV_HUGEPAGE valid memory has been removed from the -mm tree. Its filename was selftests-mm-ksm_tests-should-only-madv_hugepage-valid-memory.patch

This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------ From: Ryan Roberts ryan.roberts@arm.com Subject: selftests/mm: ksm_tests should only MADV_HUGEPAGE valid memory Date: Mon, 22 Jan 2024 12:05:54 +0000

ksm_tests was previously mmapping a region of memory, aligning the returned pointer to a PMD boundary, then setting MADV_HUGEPAGE, but was setting it past the end of the mmapped area due to not taking the pointer alignment into consideration. Fix this behaviour.

Up until commit efa7df3e3bb5 ("mm: align larger anonymous mappings on THP boundaries"), this buggy behavior was (usually) masked because the alignment difference was always less than PMD-size. But since the mentioned commit, `ksm_tests -H -s 100` started failing.

Link: https://lkml.kernel.org/r/20240122120554.3108022-1-ryan.roberts@arm.com Fixes: 325254899684 ("selftests: vm: add KSM huge pages merging time test") Signed-off-by: Ryan Roberts ryan.roberts@arm.com Cc: Pedro Demarchi Gomes pedrodemargomes@gmail.com Cc: Shuah Khan shuah@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

tools/testing/selftests/mm/ksm_tests.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/tools/testing/selftests/mm/ksm_tests.c~selftests-mm-ksm_tests-should-only-madv_hugepage-valid-memory +++ a/tools/testing/selftests/mm/ksm_tests.c @@ -566,7 +566,7 @@ static int ksm_merge_hugepages_time(int if (map_ptr_orig == MAP_FAILED) err(2, "initial mmap");

- if (madvise(map_ptr, len + HPAGE_SIZE, MADV_HUGEPAGE)) + if (madvise(map_ptr, len, MADV_HUGEPAGE)) err(2, "MADV_HUGEPAGE");

pagemap_fd = open("/proc/self/pagemap", O_RDONLY); _

Patches currently in -mm which might be from ryan.roberts@arm.com are

mm-userfaultfd-uffdio_move-implementation-should-use-ptep_get.patch tools-mm-add-thpmaps-script-to-dump-thp-usage-info.patch arm64-mm-make-set_ptes-robust-when-oas-cross-48-bit-boundary.patch