SUNRPC: Adjust rpciod workqueue parameters
Increase the concurrency level for rpciod threads to allow for allocations
etc that happen in the RPCSEC_GSS layer. Also note that the NFSv4 byte range
locks may now need to allocate memory from inside rpciod.
Add the WQ_HIGHPRI flag to improve latency guarantees while we're at it.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index d20f232..4f65ec2 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -1069,7 +1069,8 @@
* Create the rpciod thread and wait for it to start.
*/
dprintk("RPC: creating workqueue rpciod\n");
- wq = alloc_workqueue("rpciod", WQ_MEM_RECLAIM, 1);
+ /* Note: highpri because network receive is latency sensitive */
+ wq = alloc_workqueue("rpciod", WQ_MEM_RECLAIM | WQ_HIGHPRI, 0);
rpciod_workqueue = wq;
return rpciod_workqueue != NULL;
}