From 1c8d39fa7b63dcbb77af7b0325fdc519c35fe618 Mon Sep 17 00:00:00 2001 From: Suren Baghdasaryan Date: Wed, 6 Dec 2023 02:36:57 -0800 Subject: selftests/mm: call uffd_test_ctx_clear at the end of the test uffd_test_ctx_clear() is being called from uffd_test_ctx_init() to unmap areas used in the previous test run. This approach is problematic because while unmapping areas uffd_test_ctx_clear() uses page_size and nr_pages which might differ from one test run to another. Fix this by calling uffd_test_ctx_clear() after each test is done. Link: https://lkml.kernel.org/r/20231206103702.3873743-4-surenb@google.com Signed-off-by: Suren Baghdasaryan Reviewed-by: Peter Xu Reviewed-by: Axel Rasmussen Cc: Al Viro Cc: Andrea Arcangeli Cc: Brian Geffon Cc: Christian Brauner Cc: David Hildenbrand Cc: Hugh Dickins Cc: Jann Horn Cc: Kalesh Singh Cc: Liam R. Howlett Cc: Lokesh Gidra Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Mike Rapoport (IBM) Cc: Nicolas Geoffray Cc: Ryan Roberts Cc: Shuah Khan Cc: ZhangPeng Signed-off-by: Andrew Morton --- tools/testing/selftests/mm/uffd-common.c | 4 +--- tools/testing/selftests/mm/uffd-common.h | 1 + tools/testing/selftests/mm/uffd-stress.c | 5 ++++- tools/testing/selftests/mm/uffd-unit-tests.c | 1 + 4 files changed, 7 insertions(+), 4 deletions(-) (limited to 'tools/testing') diff --git a/tools/testing/selftests/mm/uffd-common.c b/tools/testing/selftests/mm/uffd-common.c index 02b89860e193..583e5a4cc0fd 100644 --- a/tools/testing/selftests/mm/uffd-common.c +++ b/tools/testing/selftests/mm/uffd-common.c @@ -262,7 +262,7 @@ static inline void munmap_area(void **area) *area = NULL; } -static void uffd_test_ctx_clear(void) +void uffd_test_ctx_clear(void) { size_t i; @@ -298,8 +298,6 @@ int uffd_test_ctx_init(uint64_t features, const char **errmsg) unsigned long nr, cpu; int ret; - uffd_test_ctx_clear(); - ret = uffd_test_ops->allocate_area((void **)&area_src, true); ret |= uffd_test_ops->allocate_area((void **)&area_dst, false); if (ret) { diff --git a/tools/testing/selftests/mm/uffd-common.h b/tools/testing/selftests/mm/uffd-common.h index 7c4fa964c3b0..870776b5a323 100644 --- a/tools/testing/selftests/mm/uffd-common.h +++ b/tools/testing/selftests/mm/uffd-common.h @@ -105,6 +105,7 @@ extern uffd_test_ops_t *uffd_test_ops; void uffd_stats_report(struct uffd_args *args, int n_cpus); int uffd_test_ctx_init(uint64_t features, const char **errmsg); +void uffd_test_ctx_clear(void); int userfaultfd_open(uint64_t *features); int uffd_read_msg(int ufd, struct uffd_msg *msg); void wp_range(int ufd, __u64 start, __u64 len, bool wp); diff --git a/tools/testing/selftests/mm/uffd-stress.c b/tools/testing/selftests/mm/uffd-stress.c index 469e0476af26..7e83829bbb33 100644 --- a/tools/testing/selftests/mm/uffd-stress.c +++ b/tools/testing/selftests/mm/uffd-stress.c @@ -323,8 +323,10 @@ static int userfaultfd_stress(void) uffd_stats_reset(args, nr_cpus); /* bounce pass */ - if (stress(args)) + if (stress(args)) { + uffd_test_ctx_clear(); return 1; + } /* Clear all the write protections if there is any */ if (test_uffdio_wp) @@ -354,6 +356,7 @@ static int userfaultfd_stress(void) uffd_stats_report(args, nr_cpus); } + uffd_test_ctx_clear(); return 0; } diff --git a/tools/testing/selftests/mm/uffd-unit-tests.c b/tools/testing/selftests/mm/uffd-unit-tests.c index 2709a34a39c5..e7d43c198041 100644 --- a/tools/testing/selftests/mm/uffd-unit-tests.c +++ b/tools/testing/selftests/mm/uffd-unit-tests.c @@ -1319,6 +1319,7 @@ int main(int argc, char *argv[]) continue; } test->uffd_fn(&args); + uffd_test_ctx_clear(); } } -- cgit v1.2.3