On Tue, Jan 9, 2018 at 3:52 AM, Kornilios Kourtis <[email protected]> wrote: > Signed-off-by: Kornilios Kourtis <[email protected]>
Acked-by: Willem de Bruijn <[email protected]> Thanks, Kornilios. > --- > Documentation/networking/msg_zerocopy.rst | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/Documentation/networking/msg_zerocopy.rst > b/Documentation/networking/msg_zerocopy.rst > index 77f6d7e..c3380f4 100644 > --- a/Documentation/networking/msg_zerocopy.rst > +++ b/Documentation/networking/msg_zerocopy.rst > @@ -72,6 +72,10 @@ this flag, a process must first signal intent by setting a > socket option: > if (setsockopt(fd, SOL_SOCKET, SO_ZEROCOPY, &one, sizeof(one))) > error(1, errno, "setsockopt zerocopy"); > > +Setting the socket option only works when the socket is in its initial > +(TCP_CLOSED) state. Trying to set the option for a socket returned by > accept(), > +for example, will lead to an EBUSY error. In this case, the option should be > set > +to the listening socket and it will be inherited by the accepted sockets.
