src/msg/dpdk: reserve funcs capacity to avoid reallocation

When a new vector is added larger than then current vector capacity,
it reallocates space. lamda function accesses the previous adress will
cause a segment fault. Therefore, reserve sufficient funcs space to
avoid reallocation.

Fixes: https://tracker.ceph.com/issues/52907
Signed-off-by: Chunsong Feng <fengchunsong@huawei.com>

diff --git a/src/msg/async/dpdk/DPDKStack.h b/src/msg/async/dpdk/DPDKStack.h
index acbac7b2011babdfb863231220953cb034504c12..4eb8604c7fbed0a00671e83a8280b525445a3558 100644 (file)
--- a/src/msg/async/dpdk/DPDKStack.h
+++ b/src/msg/async/dpdk/DPDKStack.h
@@ -254,8 +254,9 @@ class DPDKStack : public NetworkStack {
   }
 
  public:
-  explicit DPDKStack(CephContext *cct): NetworkStack(cct)
-  {}
+  explicit DPDKStack(CephContext *cct): NetworkStack(cct) {
+    funcs.reserve(cct->_conf->ms_async_op_threads);
+  }
   virtual bool support_local_listen_table() const override { return true; }
 
   virtual void spawn_worker(std::function<void ()> &&func) override;