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authorChuck Lever <chuck.lever@oracle.com>2018-03-27 10:50:27 -0400
committerJ. Bruce Fields <bfields@redhat.com>2018-04-03 15:08:11 -0400
commit7dbb53baed3c3969dea43e3cee261a75adde123c (patch)
tree7937074ff646970afd250412c121a8d5f5238415 /net/sunrpc
parentcaa3e106dc623eb41542e6221abecf9956e8a0e6 (diff)
downloadlinux-7dbb53baed3c3969dea43e3cee261a75adde123c.tar.bz2
sunrpc: Simplify do_enqueue tracing
There are three cases where svc_xprt_do_enqueue() returns without waking an nfsd thread: 1. There is no work to do 2. The transport is already busy 3. There are no available nfsd threads Only 3. is truly interesting. Move the trace point so it records that there was work to do and either an nfsd thread was awoken, or a free one could not found. As an additional clean up, remove a redundant comment and a couple of dprintk call sites. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net/sunrpc')
-rw-r--r--net/sunrpc/svc_xprt.c11
1 files changed, 3 insertions, 8 deletions
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 71f47187b4ec..5fe150c78d0a 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -382,25 +382,21 @@ void svc_xprt_do_enqueue(struct svc_xprt *xprt)
int cpu;
if (!svc_xprt_has_something_to_do(xprt))
- goto out;
+ return;
/* Mark transport as busy. It will remain in this state until
* the provider calls svc_xprt_received. We update XPT_BUSY
* atomically because it also guards against trying to enqueue
* the transport twice.
*/
- if (test_and_set_bit(XPT_BUSY, &xprt->xpt_flags)) {
- /* Don't enqueue transport while already enqueued */
- dprintk("svc: transport %p busy, not enqueued\n", xprt);
- goto out;
- }
+ if (test_and_set_bit(XPT_BUSY, &xprt->xpt_flags))
+ return;
cpu = get_cpu();
pool = svc_pool_for_cpu(xprt->xpt_server, cpu);
atomic_long_inc(&pool->sp_stats.packets);
- dprintk("svc: transport %p put into queue\n", xprt);
spin_lock_bh(&pool->sp_lock);
list_add_tail(&xprt->xpt_ready, &pool->sp_sockets);
pool->sp_stats.sockets_queued++;
@@ -420,7 +416,6 @@ void svc_xprt_do_enqueue(struct svc_xprt *xprt)
out_unlock:
rcu_read_unlock();
put_cpu();
-out:
trace_svc_xprt_do_enqueue(xprt, rqstp);
}
EXPORT_SYMBOL_GPL(svc_xprt_do_enqueue);