netdev - Re: Mass udp flow reboot linux with RealTek RTL-8169 Gigabit

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Date:	Sun, 13 Feb 2011 18:27:06 +0100
From:	Seblu <seblu@...lu.net>
To:	Francois Romieu <romieu@...zoreil.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	lkml <linux-kernel@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>, Ivan Vecera <ivecera@...hat.com>
Subject: Re: Mass udp flow reboot linux with RealTek RTL-8169 Gigabit

On Sun, Feb 13, 2011 at 2:56 PM, Francois Romieu <romieu@...zoreil.com> wrote:
> Eric Dumazet <eric.dumazet@...il.com> :
> If it still does not perform better, please include the XID line of
> the r8169 driver from dmesg.
>
I've tryed on archlinux i686 distro with 2.6.37 and host reboot like
under debian.

After this, i tryed  wiith a 2.6.38-rc4 (amd64), which include your
recent patchs.

# dmesg|grep -i xid
r8169 0000:04:00.0: eth0: RTL8168b/8111b at 0xffffc90005260000,
1c:6f:65:56:d9:17, XID 0c200000 IRQ 47

NIC seems to be reset frequently but host stop rebooting. \o//

r8169 0000:04:00.0: eth0: link up
net_ratelimit: 317 callbacks suppressed
r8169 0000:04:00.0: eth0: link up
...
net_ratelimit: 312 callbacks suppressed
r8169 0000:04:00.0: eth0: link up

i noticed a strange behaviour:
I run an iperf from computer A (gigabit plugged).
I run an ping -f from computer A.
A lot of pintk like previous one is printed on console (dmesg -n 8)

if i run an iperf from a computer B (fast eth plugged)
pings is not answered (computer A) and printk message disapear (on target)

if i run this 2nd iperf from computer A, disable iperf from computer
B, printk and ping answers are back.

i attached dmesg output.

Regards,

-- 
Sébastien Luttringer
www.seblu.net

Download attachment "dmesg.2.6.38-rc4.xz" of type "application/x-xz" (10388 bytes)