netdev - Re: rtl8168e-vl dropping tftp ack

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Message-ID: <20130417213251.GA13790@electric-eye.fr.zoreil.com>
Date:	Wed, 17 Apr 2013 23:32:51 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	Stefan Bader <stefan.bader@...onical.com>
Cc:	netdev@...r.kernel.org,
	Realtek linux nic maintainers <nic_swsd@...ltek.com>
Subject: Re: rtl8168e-vl dropping tftp ack

Stefan Bader <stefan.bader@...onical.com> :
[...]
> The Xen host has the Realtek NIC:
> 
> 2:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd.
>        RTL8111/8168B PCI Express Gigabit Ethernet controller
>        [10ec:8168] (rev 06)
>        Subsystem: Micro-Star International Co., Ltd. Device [1462:7798]

Please include the XID line from the stock kernel.

[...]
> I am not sure this is enough to find out what goes wrong but I can
> add debugging code to the kernel driver or gather other info if
> someone can hint me which things would be of interest.

(tentative guess: small packet / checksumming problem)

A pcap capture file at the interface of the tftp server with Realtek's
driver (working) then with the kernel driver (failing) should help a
lot. No need to play the soft link trick but using a recent kernel will
be appreciated - fixes will be backported to stable kernels if needed.

-- 
Ueimor
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