From fab51505480058dcb63d973515c748fa6c437cab Mon Sep 17 00:00:00 2001 From: Peter Xu Date: Fri, 14 Jan 2022 14:08:01 -0800 Subject: [PATCH] selftests/uffd: allow EINTR/EAGAIN This allow test to continue with interruptions like gdb. Link: https://lkml.kernel.org/r/20211115135219.85881-1-peterx@redhat.com Signed-off-by: Peter Xu Reviewed-by: Axel Rasmussen Cc: Andrea Arcangeli Cc: Nadav Amit Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- tools/testing/selftests/vm/userfaultfd.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c index 990f7aecf4a3..c9eddd25ba17 100644 --- a/tools/testing/selftests/vm/userfaultfd.c +++ b/tools/testing/selftests/vm/userfaultfd.c @@ -648,7 +648,7 @@ static int uffd_read_msg(int ufd, struct uffd_msg *msg) if (ret != sizeof(*msg)) { if (ret < 0) { - if (errno == EAGAIN) + if (errno == EAGAIN || errno == EINTR) return 1; err("blocking read error"); } else { @@ -724,8 +724,11 @@ static void *uffd_poll_thread(void *arg) for (;;) { ret = poll(pollfd, 2, -1); - if (ret <= 0) + if (ret <= 0) { + if (errno == EINTR || errno == EAGAIN) + continue; err("poll error: %d", ret); + } if (pollfd[1].revents & POLLIN) { if (read(pollfd[1].fd, &tmp_chr, 1) != 1) err("read pipefd error"); -- 2.34.1