The patch titled
Subject: selftests/uffd: allow EINTR/EAGAIN
has been added to the -mm tree. Its filename is
selftests-uffd-allow-eintr-eagain.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/selftests-uffd-allow-eintr-eagain.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/selftests-uffd-allow-eintr-eagain.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Peter Xu <peterx@xxxxxxxxxx>
Subject: selftests/uffd: allow EINTR/EAGAIN
This allow test to continue with interruptions like gdb.
Link: https://lkml.kernel.org/r/20211115135219.85881-1-peterx@xxxxxxxxxx
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
Reviewed-by: Axel Rasmussen <axelrasmussen@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Nadav Amit <nadav.amit@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/vm/userfaultfd.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/tools/testing/selftests/vm/userfaultfd.c~selftests-uffd-allow-eintr-eagain
+++ a/tools/testing/selftests/vm/userfaultfd.c
@@ -644,7 +644,7 @@ static int uffd_read_msg(int ufd, struct
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");
_
Patches currently in -mm which might be from peterx@xxxxxxxxxx are
selftests-uffd-allow-eintr-eagain.patch
