On Thu, Jul 13, 2023 at 11:43 PM Randy Dunlap <rdunlap@xxxxxxxxxxxxx> wrote: > > > > 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. > Thanks! I'll fix them in the next version. > -- > ~Randy
