From f8e94d99719e9b7dea5977e1a8f980f3ca87bd12 Mon Sep 17 00:00:00 2001
From: Changho Hwang <changhohwang@microsoft.com>
Date: Wed, 1 Apr 2026 19:00:03 +0000
Subject: [PATCH] disable mlx5dv_reg_dmabuf_mr

---
 src/core/ib.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/ib.cc b/src/core/ib.cc
index f783daa9..390e0a5c 100644
--- a/src/core/ib.cc
+++ b/src/core/ib.cc
@@ -91,7 +91,7 @@ IbMr::IbMr(ibv_pd* pd, void* buff, std::size_t size, bool isDataDirect) : mr_(nu
                       IBV_ACCESS_RELAXED_ORDERING | IBV_ACCESS_REMOTE_ATOMIC;
 #if defined(MSCCLPP_USE_MLX5DV)
     if (isDataDirect && MLX5DV::isAvailable()) {
-      mr_ = MLX5DV::mlx5dv_reg_dmabuf_mr(pd, offsetInDmaBuf, size, buffIntPtr, fd, accessFlags);
+      // mr_ = MLX5DV::mlx5dv_reg_dmabuf_mr(pd, offsetInDmaBuf, size, buffIntPtr, fd, accessFlags);
     }
 #endif
     if (mr_ == nullptr) {