In the current xprtrdma implementation, some memreg strategies implement ro_unmap synchronously (the MR is knocked down before the method returns) and some asynchonously (the MR will be knocked down and returned to the pool in the background).
To guarantee the MR is truly invalid before the RPC consumer is allowed to resume execution, we need an unmap method that is always synchronous, invoked from the RPC/RDMA reply handler. The new method unmaps all MRs for an RPC. The existing ro_unmap method unmaps only one MR at a time. Signed-off-by: Chuck Lever <chuck.le...@oracle.com> --- net/sunrpc/xprtrdma/xprt_rdma.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index e60d817..d9f2f65 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -365,6 +365,8 @@ struct rpcrdma_xprt; struct rpcrdma_memreg_ops { int (*ro_map)(struct rpcrdma_xprt *, struct rpcrdma_mr_seg *, int, bool); + void (*ro_unmap_sync)(struct rpcrdma_xprt *, + struct rpcrdma_req *); int (*ro_unmap)(struct rpcrdma_xprt *, struct rpcrdma_mr_seg *); int (*ro_open)(struct rpcrdma_ia *, -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html