diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2019-08-19 18:51:49 -0400 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2019-08-21 15:04:59 -0400 |
| commit | 435eba4ae0692e2f3d62988f8648efd65c935b6a (patch) | |
| tree | 8dd34dc5fecde5ab87625900e8e72b0ff7791ca7 | |
| parent | 1738de336ebc9f8d4bb1b3126c5417a5923a660a (diff) | |
| download | linux-435eba4ae0692e2f3d62988f8648efd65c935b6a.tar.bz2 | |
xprtrdma: Optimize rpcrdma_post_recvs()
Micro-optimization: In rpcrdma_post_recvs, since commit e340c2d6ef2a
("xprtrdma: Reduce the doorbell rate (Receive)"), the common case is
to return without doing anything. Found with perf.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| -rw-r--r-- | net/sunrpc/xprtrdma/verbs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index db90083ed35b..ac2abf4578b9 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -1465,7 +1465,7 @@ rpcrdma_post_recvs(struct rpcrdma_xprt *r_xprt, bool temp) count = 0; needed = buf->rb_credits + (buf->rb_bc_srv_max_requests << 1); - if (ep->rep_receive_count > needed) + if (likely(ep->rep_receive_count > needed)) goto out; needed -= ep->rep_receive_count; if (!temp) |