When calculating the major timeout for a new task, when we know that the
connection has been broken, use the task->tk_start to ensure that we also
take into account the time spent waiting for a slot or session slot. This
ensures that we fail over soft requests relatively quickly once the
connection has actually been broken, and the first requests have
started to fail.
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
net/sunrpc/xprt.c | 44 ++++++++++++++++++++++++++++++++++----------
1 file changed, 34 insertions(+), 10 deletions(-)
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 642cc0f64e44..bc1c8247750d 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -569,18 +569,44 @@ bool xprt_write_space(struct rpc_xprt *xprt)
}
EXPORT_SYMBOL_GPL(xprt_write_space);
-static void xprt_reset_majortimeo(struct rpc_rqst *req)
+static unsigned long xprt_abs_ktime_to_jiffies(ktime_t abstime)
+{
+ s64 delta = ktime_to_ns(ktime_get() - abstime);
+ return likely(delta >= 0) ?
+ jiffies - nsecs_to_jiffies(delta) :
+ jiffies + nsecs_to_jiffies(-delta);
+}
+
+static unsigned long xprt_calc_majortimeo(struct rpc_rqst *req)
{
const struct rpc_timeout *to = req->rq_task->tk_client->cl_timeout;
+ unsigned long majortimeo = req->rq_timeout;
- req->rq_majortimeo = req->rq_timeout;
if (to->to_exponential)
- req->rq_majortimeo <<= to->to_retries;
+ majortimeo <<= to->to_retries;
+ else
+ majortimeo += to->to_increment * to->to_retries;
+ if (majortimeo > to->to_maxval || majortimeo == 0)
+ majortimeo = to->to_maxval;
+ return majortimeo;
+}
+
+static void xprt_reset_majortimeo(struct rpc_rqst *req)
+{
+ req->rq_majortimeo += xprt_calc_majortimeo(req);
+}
+
+static void xprt_init_majortimeo(struct rpc_task *task, struct rpc_rqst *req)
+{
+ unsigned long time_init;
+ struct rpc_xprt *xprt = req->rq_xprt;
+
+ if (likely(xprt && xprt_connected(xprt)))
+ time_init = jiffies;
else
- req->rq_majortimeo += to->to_increment * to->to_retries;
- if (req->rq_majortimeo > to->to_maxval || req->rq_majortimeo == 0)
- req->rq_majortimeo = to->to_maxval;
- req->rq_majortimeo += jiffies;
+ time_init = xprt_abs_ktime_to_jiffies(task->tk_start);
+ req->rq_timeout = task->tk_client->cl_timeout->to_initval;
+ req->rq_majortimeo = time_init + xprt_calc_majortimeo(req);
}
/**
@@ -997,7 +1023,6 @@ xprt_request_enqueue_receive(struct rpc_task *task)
set_bit(RPC_TASK_NEED_RECV, &task->tk_runstate);
spin_unlock(&xprt->queue_lock);
- xprt_reset_majortimeo(req);
/* Turn off autodisconnect */
del_singleshot_timer_sync(&xprt->timer);
}
@@ -1631,7 +1656,6 @@ xprt_request_init(struct rpc_task *task)
struct rpc_xprt *xprt = task->tk_xprt;
struct rpc_rqst *req = task->tk_rqstp;
- req->rq_timeout = task->tk_client->cl_timeout->to_initval;
req->rq_task = task;
req->rq_xprt = xprt;
req->rq_buffer = NULL;
@@ -1644,7 +1668,7 @@ xprt_request_init(struct rpc_task *task)
req->rq_snd_buf.bvec = NULL;
req->rq_rcv_buf.bvec = NULL;
req->rq_release_snd_buf = NULL;
- xprt_reset_majortimeo(req);
+ xprt_init_majortimeo(task, req);
dprintk("RPC: %5u reserved req %p xid %08x\n", task->tk_pid,
req, ntohl(req->rq_xid));
}
--
2.20.1
