netdev - Re: [bug?] r8169: hangs under heavy load

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Message-ID: <20111125222211.GA13719@electric-eye.fr.zoreil.com>
Date:	Fri, 25 Nov 2011 23:22:11 +0100
From:	Francois Romieu <romieu@...zoreil.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Jonathan Nieder <jrnieder@...il.com>, netdev@...r.kernel.org,
	nic_swsd@...ltek.com, linux-kernel@...r.kernel.org,
	Armin Kazmi <armin.kazmi@...dortmund.de>,
	Gerd <booster@...ke7.net>
Subject: Re: [bug?] r8169: hangs under heavy load

Eric Dumazet <eric.dumazet@...il.com> :
[...]
> rtl8169_rx_interrupt(..., budget) can return budget + 1 sometimes
> because of :
> 
>                 /* Work around for AMD plateform. */
>                 if ((desc->opts2 & cpu_to_le32(0xfffe000)) &&
>                     (tp->mac_version == RTL_GIGA_MAC_VER_05)) {
>                         desc->opts2 = 0;
>                         cur_rx++;
>                 }

It needs fixing but RTL_GIGA_MAC_VER_05 is an old PCI 8169sc while
debian's bug #642911 is about a 8168c (aka RTL_GIGA_MAC_VER_{19 .. 22}).

This path is not used.

-- 
Ueimor
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