[PATCH net-next v4 5/5] selftests: drv-net: Request larger zcrx buffers
From: Björn Töpel <bjorn@kernel.org>
Date: 2026-09-25 10:44:53
Also in:
linux-kselftest, lkml
Subsystem:
kernel selftest framework, networking drivers, the rest · Maintainers:
Shuah Khan, Shuah Khan, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
The large-chunk test always requests two base pages. On interfaces with a large MTU, that may not exceed two maximum-sized frames. Request a power-of-two buffer larger than twice the MTU. This makes the existing rx_buf_len check and data-integrity traffic exercise the larger layout. Signed-off-by: Björn Töpel <bjorn@kernel.org> Tested-by: Breno Leitao <leitao@debian.org> --- tools/testing/selftests/drivers/net/hw/iou-zcrx.py | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/drivers/net/hw/iou-zcrx.py b/tools/testing/selftests/drivers/net/hw/iou-zcrx.py
index c833535d8a03..5047fdb56005 100755
--- a/tools/testing/selftests/drivers/net/hw/iou-zcrx.py
+++ b/tools/testing/selftests/drivers/net/hw/iou-zcrx.py@@ -221,9 +221,13 @@ def test_zcrx_large_chunks(cfg) -> None: single(cfg) page_size = resource.getpagesize() + mtu = cfg.dev["mtu"] nr_pages = 2 + while nr_pages * page_size <= 2 * mtu: + nr_pages *= 2 rx_buf_len = nr_pages * page_size - rx_cmd = f"{cfg.bin_local} -s -p {cfg.port} -i {cfg.ifname} -q {cfg.target} -x {nr_pages}" + rx_cmd = (f"{cfg.bin_local} -s -p {cfg.port} -i {cfg.ifname} " + f"-q {cfg.target} -x {nr_pages}") tx_cmd = f"{cfg.bin_remote} -c -h {cfg.addr_v['6']} -p {cfg.port} -l 12840" probe = cmd(rx_cmd + " -d", fail=False)
--
2.55.0