On 27.09.22 13:01, David Hildenbrand wrote:
io_uring provides a simple mechanism to test long-term, R/W GUP pins
-- via fixed buffers -- and can be used to verify that GUP pins stay
in sync with the pages in the page table even if a page would
temporarily get mapped R/O or concurrent fork() could accidentially
end up sharing pinned pages with the child.
Note that this essentially re-introduces local_config support that was
removed recently in commit 6f83d6c74ea5 ("Kselftests: remove support of
libhugetlbfs from kselftests").
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
---
The following fixup on top:
diff --git a/tools/testing/selftests/vm/anon_cow.c b/tools/testing/selftests/vm/anon_cow.c
index c1450a5d6f53..01417a604eda 100644
--- a/tools/testing/selftests/vm/anon_cow.c
+++ b/tools/testing/selftests/vm/anon_cow.c
@@ -346,7 +346,7 @@ static void do_test_iouring(char *mem, size_t size, bool use_fork)
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
struct io_uring ring;
- size_t cur, total;
+ ssize_t cur, total;
struct iovec iov;
char *buf, *tmp;
int ret, fd;
--
Thanks,
David / dhildenb
