netdev - Re: regression caused by 1d2024f61ec14bdb0c57a97a3fe73685abc2d198?

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Message-ID: <1360167332.28557.36.camel@edumazet-glaptop>
Date:	Wed, 06 Feb 2013 08:15:32 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	alexander.h.duyck@...el.com, stephen.s.ko@...el.com,
	jeffrey.t.kirsher@...el.com, David Miller <davem@...emloft.net>,
	netdev@...r.kernel.org, sony.chacko@...gic.com, mchan@...adcom.com,
	jitendra.kalsaria@...gic.com, eilong@...adcom.com
Subject: Re: regression caused by 1d2024f61ec14bdb0c57a97a3fe73685abc2d198?

On Wed, 2013-02-06 at 17:50 +0200, Michael S. Tsirkin wrote:

> Also, I'm not sure I understand when should drivers set gso size
> for incoming messages and what is a reasonable value.
> Commit log talks about improved performance for lossy connections,
> in this case, isn't this something net core should set?
> 
> I see 3 in-tree drivers that do this:
> 
> drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c:                skb_shinfo(skb)->gso_size = bnx2x

bnx2x is fine, take a look at lines 464

> drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:  skb_shinfo(skb)->gso_size = DIV_ROUND_UP((skb->le
> drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c:         skb_shinfo(skb)->gso_size = qlcnic_get_lr
> 
> It seems likely the same issue applies there?

Yes

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