[PATCH v1 01/15] SUNRPC: Signalled ASYNC tasks need to exit

Chuck Lever
2020-05-12T21:13:00Z

Ensure that signalled ASYNC rpc_tasks exit immediately instead of
spinning until a timeout (or forever).

To avoid checking for the signal flag on every scheduler iteration,
the check is instead introduced into the client's finite state
machine.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
net/sunrpc/clnt.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 8350d3a2e9a7..456e64ca14bc 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -2433,6 +2433,11 @@ void rpc_force_rebind(struct rpc_clnt *clnt)
{
struct rpc_clnt *clnt = task->tk_client;

+ if (RPC_SIGNALLED(task)) {
+ rpc_call_rpcerror(task, -ERESTARTSYS);
+ return;
+ }
+
if (xprt_adjust_timeout(task->tk_rqstp) == 0)
return;