* [PATCH] selftests/uffd: Allow EINTR/EAGAIN
@ 2021-11-15 13:52 Peter Xu
2021-11-15 17:30 ` Axel Rasmussen
0 siblings, 1 reply; 2+ messages in thread
From: Peter Xu @ 2021-11-15 13:52 UTC (permalink / raw)
To: linux-mm, linux-kernel
Cc: Andrea Arcangeli, peterx, Nadav Amit, Andrew Morton, Axel Rasmussen
This allow test to continue with interruptions like gdb.
Signed-off-by: Peter Xu <peterx@redhat.com>
---
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 8a09057d2f22..64845be3971d 100644
--- a/tools/testing/selftests/vm/userfaultfd.c
+++ b/tools/testing/selftests/vm/userfaultfd.c
@@ -644,7 +644,7 @@ 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 {
@@ -720,8 +720,11 @@ 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");
--
2.32.0
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH] selftests/uffd: Allow EINTR/EAGAIN
2021-11-15 13:52 [PATCH] selftests/uffd: Allow EINTR/EAGAIN Peter Xu
@ 2021-11-15 17:30 ` Axel Rasmussen
0 siblings, 0 replies; 2+ messages in thread
From: Axel Rasmussen @ 2021-11-15 17:30 UTC (permalink / raw)
To: Peter Xu
Cc: linux-mm, linux-kernel, Andrea Arcangeli, Nadav Amit, Andrew Morton
Looks correct to me!
Reviewed-by: Axel Rasmussen <axelrasmussen@google.com>
On Mon, Nov 15, 2021 at 5:52 AM Peter Xu <peterx@redhat.com> wrote:
>
> This allow test to continue with interruptions like gdb.
>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
> 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 8a09057d2f22..64845be3971d 100644
> --- a/tools/testing/selftests/vm/userfaultfd.c
> +++ b/tools/testing/selftests/vm/userfaultfd.c
> @@ -644,7 +644,7 @@ 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 {
> @@ -720,8 +720,11 @@ 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");
> --
> 2.32.0
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-11-15 17:30 ` Axel Rasmussen
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