netdev - Re: [PATCH net] net: rename and move busy poll mib counter

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Date:	Tue, 6 Aug 2013 13:18:21 -0500
From:	Shawn Bohrer <sbohrer@...advisors.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Eliezer Tamir <eliezer.tamir@...ux.intel.com>,
	David Miller <davem@...emloft.net>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	Eliezer Tamir <eliezer@...ir.org.il>
Subject: Re: [PATCH net] net: rename and move busy poll mib counter

On Tue, Aug 06, 2013 at 03:14:48AM -0700, Eric Dumazet wrote:
> On Tue, 2013-08-06 at 12:52 +0300, Eliezer Tamir wrote:
> > Move the low latency mib counter to the ip section.
> > Rename it from low latency to busy poll.
> > 
> > Reported-by: Shawn Bohrer <sbohrer@...advisors.com>
> > Signed-off-by: Eliezer Tamir <eliezer.tamir@...ux.intel.com>
> > ---
> 
> Well, it should not be part of IP mib, but a socket one (not existing so
> far)
> 
> Linux MIB already contains few non TCP counters :
> 
> LINUX_MIB_ARPFILTER
> LINUX_MIB_IPRPFILTER

Doesn't mean they are in the correct place either, but perhaps it's too
late for them.

> Its mostly populated by TCP counters, sure.

See, on the kernel side these are called "LINUX_MIB*" which seems
perfectly sane and I wouldn't even think the statistic is out of
place.  On the user-mode side these are all reported in
/proc/net/netstat as TcpExt statistics.  I can tell you that I don't
look at TCP statistics when I'm debugging/testing UDP issues
(apparently I should).

--
Shawn

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