SUNRPC: Use MSG_SENDPAGE_NOTLAST in xs_send_pagedata()

If we're sending more than one page via kernel_sendpage(), then set
MSG_SENDPAGE_NOTLAST between the pages so that we don't send suboptimal
frames (see commit 2f5338442425 and commit 35f9c09fe9c7).

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 1471ecceabf9..e71aff251ac1 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -360,8 +360,10 @@ static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned i
                 int flags = XS_SENDMSG_FLAGS;
 
                 remainder -= len;
-                if (remainder != 0 || more)
+                if (more)
                         flags |= MSG_MORE;
+                if (remainder != 0)
+                        flags |= MSG_SENDPAGE_NOTLAST | MSG_MORE;
                 err = do_sendpage(sock, *ppage, base, len, flags);
                 if (remainder == 0 || err != len)
                         break;