SUNRPC: Add basic load balancing to the transport switch

For now, just count the queue length. It is less accurate than counting number of bytes queued, but easier to implement.

Trond Myklebust committed 9 years ago

Commit 21f0ffa1 parent 44942b44 files · +59 −4Browse files

Showing the changes to include/linux (2 of 4 files). Show all

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@@ -238,6 +238,7 @@ struct rpc_xprt { · 237 unmodified lines
238	238	/*
239	239	* Send stuff
240	240	*/
	241	+ atomic_long_t queuelen;
241	242	spinlock_t transport_lock; /* lock transport info */
242	243	spinlock_t reserve_lock; /* lock slot table */
243	244	spinlock_t queue_lock; /* send/receive queue lock */

@@ -15,6 +15,8 @@ struct rpc_xprt_switch { · 14 unmodified lines
15	15	struct kref xps_kref;
16	16
17	17	unsigned int xps_nxprts;
	18	+ unsigned int xps_nactive;
	19	+ atomic_long_t xps_queuelen;
18	20	struct list_head xps_xprt_list;
19	21
20	22	struct net * xps_net;

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