From 49c1bd03fce57d268923646cd89d2ace67b6b366 Mon Sep 17 00:00:00 2001
From: Tianyu Liu <kingcrimsontianyu@gmail.com>
Date: Wed, 11 Sep 2024 14:36:14 -0400
Subject: [PATCH] Add more clarifying comments

---
 cpp/include/kvikio/posix_io.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/cpp/include/kvikio/posix_io.hpp b/cpp/include/kvikio/posix_io.hpp
index 26e103212a..9a28e06eec 100644
--- a/cpp/include/kvikio/posix_io.hpp
+++ b/cpp/include/kvikio/posix_io.hpp
@@ -47,6 +47,8 @@ class StreamsByThread {
   // (e.g. CUstream) with static storage duration, but instead let them leak
   // on program termination. This is to prevent undefined behavior in CUDA. See
   // <https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#initialization>
+  // This also prevents crash (segmentation fault) if clients call
+  // cuDevicePrimaryCtxReset() or cudaDeviceReset() before program termination.
   ~StreamsByThread() = default;
 
   static CUstream get(CUcontext ctx, std::thread::id thd_id)