netdev - Re: [Question]: Details on TCP

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Message-ID: <1426185365.11398.171.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Thu, 12 Mar 2015 11:36:05 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Martin Lau <kafai@...com>, Eric Salo <salo@...gle.com>
Cc:	tcpinst-wg@....edu, rapier <rapier@....edu>,
	Yuchung Cheng <ycheng@...gle.com>,
	netdev <netdev@...r.kernel.org>, kernel-team@...com
Subject: Re: [Question]: Details on TCP_INFO extension

On Thu, 2015-03-12 at 10:58 -0700, Martin Lau wrote:
> Old Title: [Tcpinst-wg] Welcome to the TCP Instrumentation List
> 
> On Thu, Feb 19, 2015 at 05:20:47PM -0500, rapier wrote:
> > There should be two sets of instruments. Operational and diagnostic. The 
> > operation instruments will be be used to extend TCP_INFO and will always 
> > be available. Google will be providing a patch for upstream with 8 
> > instruments in this category. The diagnostic instruments will be enabled 
> > by the user on an as needed basis. These data from these instruments 
> > will be stored in a separate structure that is referenced by a pointer 
> > in the socket or some other mechanism. The ability to only enable a 
> > subset of these instruments should be a design goal.
> Can Google share which 8 fields will be added to TCP_INFO?
> 
> Thanks,
> --Martin
> --

CC Eric Salo, who is working on this topic.

Note that I upstreamed yesterday support for an unified socket cookie.

http://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git/commit/?id=33cf7c90fe2f97afb1cadaa0cfb782cb9d1b9ee2



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