While tracking down memory leaks in components I ran into an interesting issue. osc/rdma uses an opal_free_list_t (not an ompi_free_list_t) for buffer fragments. The fragment class allocates a buffer as part in the constructor and frees the buffer in the destructor. The problem is that the item constructor is called but the destructor is never called.
I looked into the issue and I see what is happening. When growing the free list we call the constructor for each item we allocate (see opal_free_list.c:113) but the free list destructor does not invoke the destructor. This is different from ompi_free_list_t which does invoke the destructor on each constructed item. The question is. Is this difference intentional? It seems a little odd that the free list does not call the item destructor given that it calls the constructor. If this is intentional is there a reason for this behavior? If not I plan on "fixing" the opal_free_list_t destructor to call the item destructor. -Nathan
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