diff options
author | Peter Xu <peterx@redhat.com> | 2023-04-12 19:43:41 +0300 |
---|---|---|
committer | Andrew Morton <akpm@linux-foundation.org> | 2023-04-19 02:30:06 +0300 |
commit | 0210c43ef623a3c35cafd7dbe25b1b3c1699e7e9 (patch) | |
tree | a62b79317977942d74681ba23d931c8d0aa9a173 /tools/testing/selftests/mm/uffd-stress.c | |
parent | 508340845dd1423b6c81fccf082039dff202fb9f (diff) | |
download | linux-0210c43ef623a3c35cafd7dbe25b1b3c1699e7e9.tar.xz |
selftests/mm: let uffd_handle_page_fault() take wp parameter
Make the handler optionally apply WP bit when resolving page faults for
either missing or minor page faults. This moves towards removing global
test_uffdio_wp outside of the common code.
Link: https://lkml.kernel.org/r/20230412164341.328618-1-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Zach O'Keefe <zokeefe@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'tools/testing/selftests/mm/uffd-stress.c')
-rw-r--r-- | tools/testing/selftests/mm/uffd-stress.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/tools/testing/selftests/mm/uffd-stress.c b/tools/testing/selftests/mm/uffd-stress.c index ce7251ab93ef..747d588c0d69 100644 --- a/tools/testing/selftests/mm/uffd-stress.c +++ b/tools/testing/selftests/mm/uffd-stress.c @@ -96,6 +96,7 @@ static void uffd_stats_reset(struct uffd_args *args, unsigned long n_cpus) for (i = 0; i < n_cpus; i++) { args[i].cpu = i; + args[i].apply_wp = test_uffdio_wp; args[i].missing_faults = 0; args[i].wp_faults = 0; args[i].minor_faults = 0; @@ -155,7 +156,7 @@ static void *locking_thread(void *arg) static int copy_page_retry(int ufd, unsigned long offset) { - return __copy_page(ufd, offset, true); + return __copy_page(ufd, offset, true, test_uffdio_wp); } pthread_mutex_t uffd_read_mutex = PTHREAD_MUTEX_INITIALIZER; @@ -308,7 +309,7 @@ static void sighndl(int sig, siginfo_t *siginfo, void *ptr) * This also tests UFFD_FEATURE_EVENT_FORK event along with the signal * feature. Using monitor thread, verify no userfault events are generated. */ -static int faulting_process(int signal_test) +static int faulting_process(int signal_test, bool wp) { unsigned long nr; unsigned long long count; @@ -343,7 +344,7 @@ static int faulting_process(int signal_test) if (steps == 1) { /* This is a MISSING request */ steps++; - if (copy_page(uffd, offset)) + if (copy_page(uffd, offset, wp)) signalled++; } else { /* This is a WP request */ @@ -507,6 +508,7 @@ static int userfaultfd_events_test(void) true, test_uffdio_wp, false)) err("register failure"); + args.apply_wp = test_uffdio_wp; if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, &args)) err("uffd_poll_thread create"); @@ -515,7 +517,7 @@ static int userfaultfd_events_test(void) err("fork"); if (!pid) - exit(faulting_process(0)); + exit(faulting_process(0, test_uffdio_wp)); waitpid(pid, &err, 0); if (err) @@ -551,11 +553,12 @@ static int userfaultfd_sig_test(void) true, test_uffdio_wp, false)) err("register failure"); - if (faulting_process(1)) + if (faulting_process(1, test_uffdio_wp)) err("faulting process failed"); uffd_test_ops->release_pages(area_dst); + args.apply_wp = test_uffdio_wp; if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, &args)) err("uffd_poll_thread create"); @@ -564,7 +567,7 @@ static int userfaultfd_sig_test(void) err("fork"); if (!pid) - exit(faulting_process(2)); + exit(faulting_process(2, test_uffdio_wp)); waitpid(pid, &err, 0); if (err) @@ -628,6 +631,7 @@ static int userfaultfd_minor_test(void) page_size); } + args.apply_wp = test_uffdio_wp; if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, &args)) err("uffd_poll_thread create"); |