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authorStefano Brivio <sbrivio@redhat.com>2021-10-12 22:56:36 +0200
committerStefano Brivio <sbrivio@redhat.com>2021-10-14 13:15:12 +0200
commit4869d309e122445ee43ab79e00bd3b1dfa9d9275 (patch)
tree528ce4bf60b53ba67a2463da81d10caa915e9de6
parentc9d57fee7c870d0421c01fa9899065e4a68020ce (diff)
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doc: Fix up note about missing tcpi_snd_wnd in man page
The behaviour without tcpi_snd_wnd changed: the only difference now is the advertised window, which corresponds to the queried sending buffer size. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
-rw-r--r--passt.110
1 files changed, 3 insertions, 7 deletions
diff --git a/passt.1 b/passt.1
index df9892b..554d31d 100644
--- a/passt.1
+++ b/passt.1
@@ -695,13 +695,9 @@ option, see \fBtcp\fR(7). Before Linux 5.3, i.e. before Linux kernel commit
8f7baad7f035 ("tcp: Add snd_wnd to TCP_INFO"), the sending window
(\fIsnd_wnd\fR field) is not available.
-If the sending window cannot be queried, it will always be announced as a fixed
-value to guest or target namespace (14 600 bytes, suggested by RFC 6928), and
-segments received by guest or target namespace will be acknowledged as soon as
-the corresponding payload is enqueued to the corresponding socket. The normal
-behaviour is to acknowledge segments only as the remote peer acknowledges the
-corresponding payload, in order to reflect the congestion control dynamic back
-to the sender. This might affect throughput of TCP connections.
+If the sending window cannot be queried, it will always be announced as the
+current sending buffer size to guest or target namespace. This might affect
+throughput of TCP connections.
.SH LIMITATIONS