diff options
| author |   Trond Myklebust <trond.myklebust@hammerspace.com> | 2021-02-16 12:17:22 -0500 |
|---|---|---|
| committer |   Chuck Lever <chuck.lever@oracle.com> | 2021-02-16 12:32:31 -0500 |
| commit | e0a912e8ddbaa0536352dd8318845cdfdbab7bab (patch) | |
| tree | 4f617fb832e8cd3a77a18941f7fd5a764169b59b /net | |
| parent | svcrdma: Hold private mutex while invoking rdma_accept() (diff) | |
| download | linux-dev-e0a912e8ddbaa0536352dd8318845cdfdbab7bab.tar.xz linux-dev-e0a912e8ddbaa0536352dd8318845cdfdbab7bab.zip | |
SUNRPC: Use TCP_CORK to optimise send performance on the server
Use a counter to keep track of how many requests are queued behind the
xprt->xpt_mutex, and keep TCP_CORK set until the queue is empty.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Link: https://lore.kernel.org/linux-nfs/20210213202532.23146-1-trondmy@kernel.org/T/#u
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/svcsock.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 5a809c64dc7b..231f510a4830 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -1171,18 +1171,23 @@ static int svc_tcp_sendto(struct svc_rqst *rqstp) svc_tcp_release_rqst(rqstp); + atomic_inc(&svsk->sk_sendqlen); mutex_lock(&xprt->xpt_mutex); if (svc_xprt_is_dead(xprt)) goto out_notconn; + tcp_sock_set_cork(svsk->sk_sk, true); err = svc_tcp_sendmsg(svsk->sk_sock, &msg, xdr, marker, &sent); xdr_free_bvec(xdr); trace_svcsock_tcp_send(xprt, err < 0 ? err : sent); if (err < 0 || sent != (xdr->len + sizeof(marker))) goto out_close; + if (atomic_dec_and_test(&svsk->sk_sendqlen)) + tcp_sock_set_cork(svsk->sk_sk, false); mutex_unlock(&xprt->xpt_mutex); return sent; out_notconn: + atomic_dec(&svsk->sk_sendqlen); mutex_unlock(&xprt->xpt_mutex); return -ENOTCONN; out_close: @@ -1192,6 +1197,7 @@ out_close: (err < 0) ? err : sent, xdr->len); set_bit(XPT_CLOSE, &xprt->xpt_flags); svc_xprt_enqueue(xprt); + atomic_dec(&svsk->sk_sendqlen); mutex_unlock(&xprt->xpt_mutex); return -EAGAIN; } @@ -1261,7 +1267,7 @@ static void svc_tcp_init(struct svc_sock *svsk, struct svc_serv *serv) svsk->sk_datalen = 0; memset(&svsk->sk_pages[0], 0, sizeof(svsk->sk_pages)); - tcp_sk(sk)->nonagle |= TCP_NAGLE_OFF; + tcp_sock_set_nodelay(sk); set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); switch (sk->sk_state) { |