The patch titled
Subject: selftests/mm: add separate UFFDIO_MOVE test for PMD splitting
has been added to the -mm mm-unstable branch. Its filename is
selftests-mm-add-separate-uffdio_move-test-for-pmd-splitting.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-mm-add-separate-uffdio_move-test-for-pmd-splitting.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Subject: selftests/mm: add separate UFFDIO_MOVE test for PMD splitting
Date: Fri, 29 Dec 2023 18:56:36 -0800
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@xxxxxxxxxx
Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Axel Rasmussen <axelrasmussen@xxxxxxxxxx>
Cc: Brian Geffon <bgeffon@xxxxxxxxxx>
Cc: Christian Brauner <brauner@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Jann Horn <jannh@xxxxxxxxxx>
Cc: Kalesh Singh <kaleshsingh@xxxxxxxxxx>
Cc: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Cc: Lokesh Gidra <lokeshgidra@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Cc: Nicolas Geoffray <ngeoffray@xxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Ryan Roberts <ryan.roberts@xxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: ZhangPeng <zhangpeng362@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/mm/uffd-unit-tests.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
--- a/tools/testing/selftests/mm/uffd-unit-tests.c~selftests-mm-add-separate-uffdio_move-test-for-pmd-splitting
+++ a/tools/testing/selftests/mm/uffd-unit-tests.c
@@ -1199,6 +1199,16 @@ static void uffd_move_test(uffd_test_arg
static void uffd_move_pmd_test(uffd_test_args_t *targs)
{
+ if (madvise(area_dst, nr_pages * page_size, MADV_HUGEPAGE))
+ err("madvise(MADV_HUGEPAGE) failure");
+ uffd_move_test_common(targs, read_pmd_pagesize(),
+ uffd_move_pmd_handle_fault);
+}
+
+static void uffd_move_pmd_split_test(uffd_test_args_t *targs)
+{
+ if (madvise(area_dst, nr_pages * page_size, MADV_NOHUGEPAGE))
+ err("madvise(MADV_NOHUGEPAGE) failure");
uffd_move_test_common(targs, read_pmd_pagesize(),
uffd_move_pmd_handle_fault);
}
@@ -1329,6 +1339,13 @@ uffd_test_case_t uffd_tests[] = {
.mem_targets = MEM_ANON,
.uffd_feature_required = UFFD_FEATURE_MOVE,
.test_case_ops = &uffd_move_test_pmd_case_ops,
+ },
+ {
+ .name = "move-pmd-split",
+ .uffd_fn = uffd_move_pmd_split_test,
+ .mem_targets = MEM_ANON,
+ .uffd_feature_required = UFFD_FEATURE_MOVE,
+ .test_case_ops = &uffd_move_test_pmd_case_ops,
},
{
.name = "wp-fork",
_
Patches currently in -mm which might be from surenb@xxxxxxxxxx are
selftests-mm-add-separate-uffdio_move-test-for-pmd-splitting.patch
