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SUNRPC: RPC transport queue must be low latency

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rpciod can easily get congested due to the long list of queued rpc_tasks.
Having the receive queue wait in turn for those tasks to complete can
therefore be a bottleneck.

Address the problem by separating the workqueues into:
- rpciod: manages rpc_tasks
- xprtiod: manages transport related work.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust
2016-05-27 10:39:50 -04:00
parent 5157b95696
commit 40a5f1b19b
4 changed files with 28 additions and 11 deletions
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include/linux/sunrpc/sched.h
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@@ -247,6 +247,7 @@ void rpc_show_tasks(struct net *);
int rpc_init_mempool(void);
void rpc_destroy_mempool(void);
extern struct workqueue_struct *rpciod_workqueue;
extern struct workqueue_struct *xprtiod_workqueue;
void rpc_prepare_task(struct rpc_task *task);
static inline int rpc_wait_for_completion_task(struct rpc_task *task)