X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=man%2Fsystemd.socket.xml;h=8394fa81aac5e7e65add6eaf7680de46aa624495;hp=5efb398b09d3f165dc91106b25a62c1c690b9d07;hb=06b643e7f5a3b79005dd57497897ab7255fe3659;hpb=209e9dcd7b2f23b68ff93bf20fad025bc03219ac

diff --git a/man/systemd.socket.xml b/man/systemd.socket.xml
index 5efb398b0..8394fa81a 100644
--- a/man/systemd.socket.xml
+++ b/man/systemd.socket.xml
@@ -488,7 +488,7 @@
                         </varlistentry>
 
                         <varlistentry>
-                                <term><varname>KeepAliveTime=</varname></term>
+                                <term><varname>KeepAliveTimeSec=</varname></term>
                                 <listitem><para>Takes time (in seconds) as argument . The connection needs to remain
                                 idle before TCP starts sending keepalive probes. This controls the TCP_KEEPIDLE
                                 socket option (see
@@ -500,7 +500,7 @@
                         </varlistentry>
 
                         <varlistentry>
-                                <term><varname>KeepAliveInterval=</varname></term>
+                                <term><varname>KeepAliveIntervalSec=</varname></term>
                                 <listitem><para>Takes time (in seconds) as argument between individual keepalive probes,
                                 if the socket option SO_KEEPALIVE has  been set on this socket seconds as argument.
                                 This controls the TCP_KEEPINTVL socket option (see
@@ -513,7 +513,7 @@
 
                         <varlistentry>
                                 <term><varname>KeepAliveProbes=</varname></term>
-                                <listitem><para>Takes interger as argument. It's the number of unacknowledged probes to
+                                <listitem><para>Takes integer as argument. It's the number of unacknowledged probes to
                                 send before considering the connection dead and notifying the application layer.
                                 This controls the TCP_KEEPCNT socket option (see
                                 <citerefentry><refentrytitle>socket</refentrytitle><manvolnum>7</manvolnum></citerefentry>
@@ -545,6 +545,47 @@
                                 for details.).</para></listitem>
                         </varlistentry>
 
+                        <varlistentry>
+                                <term><varname>DeferAcceptSec=</varname></term>
+
+                                <listitem><para>Takes time (in
+                                seconds) as argument. If set, the
+                                listening process will be awakened
+                                only when data arrives on the socket,
+                                and not immediately when connection is
+                                established. When this option is set,
+                                the
+                                <constant>TCP_DEFER_ACCEPT</constant>
+                                socket option will be used (see
+                                <citerefentry><refentrytitle>tcp</refentrytitle><manvolnum>7</manvolnum></citerefentry>),
+                                and the kernel will ignore initial ACK
+                                packets without any data. The argument
+                                specifies the approximate amount of
+                                time the kernel should wait for
+                                incoming data before falling back to
+                                the normal behaviour of honouring
+                                empty ACK packets. This option is
+                                beneficial for protocols where the
+                                client sends the data first (e.g.
+                                HTTP, in contrast to SMTP), because
+                                the server process will not be woken
+                                up unnecessarily before it can take
+                                any action.
+                                </para>
+
+                                <para>If the client also uses the
+                                <constant>TCP_DEFER_ACCEPT</constant>
+                                option, the latency of the initial
+                                connection may be reduced, because the
+                                kernel will send data in the final
+                                packet establishing the connection
+                                (the third packet in the "three-way
+                                handshake").</para>
+
+                                <para>Disabled by default.</para>
+                                </listitem>
+                        </varlistentry>
+
                         <varlistentry>
                                 <term><varname>ReceiveBuffer=</varname></term>
                                 <term><varname>SendBuffer=</varname></term>