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Commit c25573b5 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

SUNRPC: Ensure we always bump the backlog queue in xprt_free_slot 



Whenever we free a slot, we know that the resulting xprt->num_reqs will
be less than xprt->max_reqs, so we know that we can release at least one
backlogged rpc_task.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org [>=3.1]
parent 7fdcf13b

net/sunrpc/xprt.c

+4 −6
Original line number Diff line number Diff line
@@ -995,13 +995,11 @@ out_init_req: 


static void xprt_free_slot(struct rpc_xprt *xprt, struct rpc_rqst *req)

{

	if (xprt_dynamic_free_slot(xprt, req))

		return;



	memset(req, 0, sizeof(*req));	/* mark unused */



	spin_lock(&xprt->reserve_lock);

	if (!xprt_dynamic_free_slot(xprt, req)) {

		memset(req, 0, sizeof(*req));	/* mark unused */

		list_add(&req->rq_list, &xprt->free);

	}

	rpc_wake_up_next(&xprt->backlog);

	spin_unlock(&xprt->reserve_lock);

}