On 7/13/23 04:24, menglong8.dong@xxxxxxxxx wrote: > diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst > index 4a010a7cde7f..3de2dce74037 100644 > --- a/Documentation/networking/ip-sysctl.rst > +++ b/Documentation/networking/ip-sysctl.rst > @@ -694,6 +694,20 @@ tcp_retries2 - INTEGER > RFC 1122 recommends at least 100 seconds for the timeout, > which corresponds to a value of at least 8. > > +tcp_oom_retries - INTEGER > + RTO retransmissions count of the receiver is recognised as OOM. > + Given a value N, a hypothetical TCP connection will enter probe > + state if N times RTO retransmissions performed and every > + retransmission gets a pure ack, who doesn't contain SACK block. ACK > + > + The default value is 0, which means disable the OOM detection. > + If disabled, skb will be dropped directly, without sending an > + ACK, when rmem schedule fails. The function is valid only if sack SACK > + is enabled. > + > + 3 is the suggested value to enable this function. Do't make it Don't > + greater than tcp_retries2. -- ~Randy
