This patchset allows for io_uring zerocopy to support REQ_F_CQE_SKIP,
skipping the normal completion notification, but not the zerocopy buffer
release notification.
This patchset also includes a test to test these changes, and a patch to
mini_liburing to enable io_uring_peek_cqe, which is needed for the test.
Oliver Crumrine (3):
io_uring: Add REQ_F_CQE_SKIP support for io_uring zerocopy
io_uring: Add io_uring_peek_cqe to mini_liburing
io_uring: Support IOSQE_CQE_SKIP_SUCCESS in io_uring zerocopy test
io_uring/net.c | 6 +--
tools/include/io_uring/mini_liburing.h | 18 +++++++++
.../selftests/net/io_uring_zerocopy_tx.c | 37 +++++++++++++++++--
.../selftests/net/io_uring_zerocopy_tx.sh | 7 +++-
4 files changed, 59 insertions(+), 10 deletions(-)
--
2.44.0
Hi,
As mentioned in each patch, this implements the solution that we discussed in
December 2023, in [1]. This turned out to be very clean and easy. It should also
be quite easy to maintain.
This should also make Peter Zijlstra happy, because it directly addresses the
root cause of his "NAK NAK NAK" reply [2]. :)
I haven't done much build testing, because selftests are not so easy to build
with a cross-compiler. So it's just tested on x86 64-bit so far.
[1] https://lore.kernel.org/all/783a4178-1dec-4e30-989a-5174b8176b09@redhat.com/
[2] https://lore.kernel.org/lkml/20231103121652.GA6217@noisy.programming.kicks-…
Cc: David Hildenbrand <david(a)redhat.com>
Cc: Mark Brown <broonie(a)kernel.org>
Cc: Muhammad Usama Anjum <usama.anjum(a)collabora.com>
Cc: Suren Baghdasaryan <surenb(a)google.com>
Cc: Peter Zijlstra <peterz(a)infradead.org>
John Hubbard (2):
selftests: break the dependency upon local header files
selftests/mm: fix additional build errors for selftests
tools/include/uapi/linux/memfd.h | 39 +++
tools/include/uapi/linux/userfaultfd.h | 386 +++++++++++++++++++++++++
tools/testing/selftests/lib.mk | 9 +
tools/testing/selftests/mm/Makefile | 2 +-
4 files changed, 435 insertions(+), 1 deletion(-)
create mode 100644 tools/include/uapi/linux/memfd.h
create mode 100644 tools/include/uapi/linux/userfaultfd.h
base-commit: 98560e9019851bf55b8a4073978a623a3bcf98c0
--
2.44.0
In this series, ksft_exit_fail_perror() is being added which is helper
function on top of ksft_exit_fail_msg(). It prints errno and its string
form always. After writing and porting several kselftests, I've found
out that most of times ksft_exit_fail_msg() isn't useful if errno value
isn't printed. The ksft_exit_fail_perror() provides a convenient way to
always print errno when its used.
Muhammad Usama Anjum (2):
selftests: add ksft_exit_fail_perror()
selftests: exec: Use new ksft_exit_fail_perror() helper
tools/testing/selftests/exec/recursion-depth.c | 10 +++++-----
tools/testing/selftests/kselftest.h | 14 ++++++++++++++
2 files changed, 19 insertions(+), 5 deletions(-)
--
2.39.2