lkml.org 
[lkml]   [2023]   [Jul]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH net-next v2] net: tcp: support to probe tcp receiver OOM
On Thu, Jul 13, 2023 at 11:43 PM Randy Dunlap <rdunlap@infradead.org> wrote:
>
>
>
> On 7/13/23 04:24, menglong8.dong@gmail.com 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

\
 
 \ /
  Last update: 2023-07-16 20:48    [W:0.031 / U:0.848 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site