Eric Blake <ebl...@redhat.com> wrote: > Nagle's algorithm adds latency in order to reduce network packet > overhead on small packets. But when we are already using corking to > merge smaller packets into transactional requests, the extra delay > from TCP defaults just gets in the way. > > For reference, qemu as an NBD client already requests TCP_NODELAY (see > nbd_connect() in nbd/client-connection.c); as does libnbd as a client > [1], and nbdkit as a server [2]. > > [1] > https://gitlab.com/nbdkit/libnbd/-/blob/a48a1142/generator/states-connect.c#L39 > [2] https://gitlab.com/nbdkit/nbdkit/-/blob/45b72f5b/server/sockets.c#L430 > > CC: Florian Westphal <f...@strlen.de> > Signed-off-by: Eric Blake <ebl...@redhat.com> > --- > nbd/server.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/nbd/server.c b/nbd/server.c > index a4750e41880..976223860bf 100644 > --- a/nbd/server.c > +++ b/nbd/server.c > @@ -2755,6 +2755,7 @@ void nbd_client_new(QIOChannelSocket *sioc, > } > client->tlsauthz = g_strdup(tlsauthz); > client->sioc = sioc; > + qio_channel_set_delay(QIO_CHANNEL(cioc), false);
../nbd/server.c: In function 'nbd_client_new': ../nbd/server.c:2763:39: error: 'cioc' undeclared (first use in this function); did you mean 'sioc'? Other than that this looks good to me.
