The RPC/RDMA code had a constant 5-second reconnect backoff, and
always performed it, even when re-establishing a connection to a
server after the RPC layer closed it due to being idle. Make it
an geometric backoff (up to 30 seconds), and don't delay idle
reconnect.
Signed-off-by: Tom Talpey <[email protected]>
---
net/sunrpc/xprtrdma/transport.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index c2da680..9839c3d 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -463,6 +463,8 @@ xprt_rdma_close(struct rpc_xprt *xprt)
struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt);
dprintk("RPC: %s: closing\n", __func__);
+ if (r_xprt->rx_ep.rep_connected > 0)
+ xprt->reestablish_timeout = 0;
xprt_disconnect_done(xprt);
(void) rpcrdma_ep_disconnect(&r_xprt->rx_ep, &r_xprt->rx_ia);
}
@@ -490,6 +492,11 @@ xprt_rdma_connect(struct rpc_task *task)
/* Reconnect */
schedule_delayed_work(&r_xprt->rdma_connect,
xprt->reestablish_timeout);
+ xprt->reestablish_timeout <<= 1;
+ if (xprt->reestablish_timeout > (30 * HZ))
+ xprt->reestablish_timeout = (30 * HZ);
+ else if (xprt->reestablish_timeout < (5 * HZ))
+ xprt->reestablish_timeout = (5 * HZ);
} else {
schedule_delayed_work(&r_xprt->rdma_connect, 0);
if (!RPC_IS_ASYNC(task))