netdev - Re: net: more accurate skb truesize

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Message-ID: <1334047544.3126.14.camel@edumazet-glaptop>
Date:	Tue, 10 Apr 2012 10:45:44 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	monstr@...str.eu
Cc:	netdev@...r.kernel.org,
	John Williams <john.williams@...alogix.com>,
	David Miller <davem@...emloft.net>
Subject: Re: net: more accurate skb truesize - regression on Microblaze

On Tue, 2012-04-10 at 10:37 +0200, Michal Simek wrote:
> On 04/10/2012 10:32 AM, Eric Dumazet wrote:
> > On Tue, 2012-04-10 at 10:27 +0200, Eric Dumazet wrote:
> >
> >> BTW, some NIC drivers are known to provide fat skb in their rx path, and
> >> need to be fixed as well. (Some others just lie about skb->truesize to
> >> avoid the tcp slowdown, see my previous iwlwifi patch)
> >>
> >>
> >
> > What is the driver you currently use on your platform ?
> 
> Using Xilinx ll_temac(in mainline) and axi_emac.
> 

OK thanks, could you please give us the content
of /proc/sys/net/ipv4/tcp_rmem ?



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