netdev - Re: TCPBacklogDrops during aggressive bursts of traffic

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Message-ID: <1337679045.3361.154.camel@edumazet-glaptop>
Date:	Tue, 22 May 2012 11:30:45 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Kieran Mansley <kmansley@...arflare.com>
Cc:	Ben Hutchings <bhutchings@...arflare.com>, netdev@...r.kernel.org
Subject: Re: TCPBacklogDrops during aggressive bursts of traffic

On Tue, 2012-05-22 at 11:26 +0200, Eric Dumazet wrote:
> On Tue, 2012-05-22 at 09:20 +0100, Kieran Mansley wrote:
> > On Thu, 2012-05-17 at 18:37 +0200, Eric Dumazet wrote:
> > > 
> > > With net-next and tcp coalescing, I no longer have TCPBacklogDrops /
> > > collapses, but I dont have sfc card/driver.
> > 
> > I can still reproduce them on net-next.
> > 
> > Kieran
> 
> Can you reproduce this with tg3 NIC for example ?
> 

Also can you post a pcap capture of problematic flow ?

(maybe a link to pcap if too big, or private mail)



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