From 8781bfdea3db59236b9954bfda82c2ebb4a54c56 Mon Sep 17 00:00:00 2001 From: Sebastian Chlad Date: Wed, 3 Sep 2025 13:35:24 +0200 Subject: [PATCH liburing] test/recvsend_bundle: enlarge recv buf-ring to 2 MiB to avoid ENOBUFS on ppc64 Sub-test (d) "bundling with full socket" pre-fills the peer until EAGAIN. On some architectures (like ppc64), once the tcp_w/rmem min is set to higher value, like 64k and with autotuning on, the sender can queue more than the 1MiB before the receiver arms multishot recv. With a 1MiB provided-buffer pool (MSG_SIZE * RECV_BIDS, so 8192 * 128), the first recv runs out of provided buffers and fails with -105 (ENOBUFS). Bump RECV_BIDS from 8192 to 16384, so the pool no longer underflows during the prefill on ppc64. This is a minimal, test-only tweak to stabilize results across different arches without changing test logic. Signed-off-by: Sebastian Chlad --- test/recvsend_bundle.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/test/recvsend_bundle.c b/test/recvsend_bundle.c index d6c5ec3b..da076a52 100644 --- a/test/recvsend_bundle.c +++ b/test/recvsend_bundle.c @@ -21,7 +21,7 @@ static int nr_msgs; static int use_tcp; static int classic_buffers; -#define RECV_BIDS 8192 +#define RECV_BIDS 16384 #define RECV_BID_MASK (RECV_BIDS - 1) #include "liburing.h" -- 2.51.0