Re: new sysctl tunable knob for tcpip

2017-08-01 Thread Massimo Sala
Ok, I understand the lesson. Now the practice : I want to set a 200 seconds timeout, valid on all the interfaces, on all the connections. How can I calculate the value to set tcp_retries2 to ? best regards, Sala On 31/07/2017, valdis.kletni...@vt.edu wrote: > On Mon,

Re: new sysctl tunable knob for tcpip

2017-07-31 Thread valdis . kletnieks
On Mon, 31 Jul 2017 15:16:34 +0200, Massimo Sala said: > I wish to suggest to developers to add this new knob : Note that most of the existing knobs were chosen fairly carefully, and that sometimes, the values chosen aren't immediately obvious, because they have to also take into account

new sysctl tunable knob for tcpip : errata corrige

2017-07-31 Thread Massimo Sala
> net...@vger.kernel.org > greg k-h I see now the emails are trunated. Greg, I presume you wrote "netdev" ? Sala -- Forwarded message -- From: Massimo Sala <massimo.sala...@gmail.com> Date: Mon, 31 Jul 2017 15:16:34 +0200 Subject: Re: new sysctl

Re: new sysctl tunable knob for tcpip

2017-07-31 Thread Massimo Sala
I wish to suggest to developers to add this new knob : tcp_retries2_time - INTEGER This value influences the timeout (seconds) of an alive TCP connection, when RTO retransmissions remain unacknowledged. RFC 1122 recommends at least 100 seconds for the timeout,

Re: new sysctl tunable knob for tcpip

2017-07-18 Thread valdis . kletnieks
On Thu, 06 Jul 2017 09:23:46 +0200, Massimo Sala said: > I have an idea about a new sysctl knob. It is under net.ipv4. Step 0: Identify whether it is even a good idea. TCP/IP is tougher than you think, especially when you get into congestion control. Step 0.1: Figure out if your brilliant idea

Re: new sysctl tunable knob for tcpip

2017-07-17 Thread Greg KH
On Thu, Jul 06, 2017 at 09:23:46AM +0200, Massimo Sala wrote: > I have an idea about a new sysctl knob. It is under net.ipv4. > > q1) which is the right kernel m-list to discuss it ? net...@vger.kernel.org > 2) any suggestion how to gain the critical mass of consensus ? > > 3) at first : is it

new sysctl tunable knob for tcpip

2017-07-17 Thread Massimo Sala
I have an idea about a new sysctl knob. It is under net.ipv4. q1) which is the right kernel m-list to discuss it ? 2) any suggestion how to gain the critical mass of consensus ? 3) at first : is it mandatory to code the patch ? optional ... but better for 2) ? best regards, Sala