linux-kernel - Re: large packet loss take2 2.6.31.x

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Message-ID: <20091122205054.GA7361@ami.dom.local>
Date:	Sun, 22 Nov 2009 21:50:54 +0100
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Caleb Cushing <xenoterracide@...il.com>
Cc:	Frans Pop <elendil@...net.nl>, Andi Kleen <andi@...stfloor.org>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: large packet loss take2 2.6.31.x

On Sun, Nov 22, 2009 at 02:35:10PM -0500, Caleb Cushing wrote:
> haven't had time to do a test yet. but would it be of any use for you
> all for me to throw another nic (it'd be a different driver for sure)
> in this box and test that on a problematic kernel? I have some but not
> with me.

Of course it would be useful. Especially if you find new bugs. ;-)
I'm not sure it's the fastest way to diagnose this problem, but if
it's not a problem for you...

Btw, currently I don't consider this dropping means there has to be
a bug. It could be otherwise - a feature... e.g. when a new kernel
can transmit faster (then dropping in some other, slower place can
happen).

Jarek P.

> 
> On Wed, Nov 18, 2009 at 5:38 PM, Jarek Poplawski <jarkao2@...il.com> wrote:
> > On Wed, Nov 18, 2009 at 09:10:34PM +0100, Jarek Poplawski wrote:
> >> On Wed, Nov 18, 2009 at 01:21:19PM -0500, Caleb Cushing wrote:
> >> > yeah testing it under my known working config first. I'll get back w/ you later.
> >>
> >> Btw, since dropping at hardware (NIC) level seems more likely to me,
> >> could you send 'ethtool eth0', and 'ethtool -S eth0' after such tests
> >> (both sides).
> >
> > Hmm... and 'netstat -s' before and after the test (both sides).
> >
> > Jarek P.
> >
> 
> 
> 
> -- 
> Caleb Cushing
> 
> http://xenoterracide.blogspot.com
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