linux-kernel - Re: many rx packets dropped since 2.6.37

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Message-ID: <1335357975.3274.187.camel@edumazet-glaptop>
Date:	Wed, 25 Apr 2012 14:46:15 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Chris <xchris89x@...glemail.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: many rx packets dropped since 2.6.37

On Wed, 2012-04-25 at 14:34 +0200, Chris wrote:

> Are you sure that these packets are really dropped? I see a lot of
> more packets dropped with virtio_net instead of e1000. (KVM
> environments)
> 

Yep, we are sure packets are dropped, just read the patch and you'll can
see this.

> Why do we see dropped packets only in virtual environments and bonded
> network interfaces and not on real network interfaces?

This has to be investigated, eventually.

About the bond, if you are in active-backup mode, a frame coming to
inactive device is going to be dropped, or you could have duplication of
logical frames.

You can use tcpdump to get a copy of these frames.



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