linux-kernel - Re: [3.8-rc] regression: NETDEV WATCHDOG: eth0 (r8169): transmit queue 0 timed out

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Date:	Sun, 6 Jan 2013 14:03:39 +0100
From:	Jörg Otte <jrg.otte@...il.com>
To:	Francois Romieu <romieu@...zoreil.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [3.8-rc] regression: NETDEV WATCHDOG: eth0 (r8169): transmit
 queue 0 timed out

2013/1/5 Francois Romieu <romieu@...zoreil.com>:
> Can you check if things improve with v3.8-rc2 after removing :
>
> 1. 9ecb9aabaf634677c77af467f4e3028b09d7bcda
>    r8169: workaround for missing extended GigaMAC registers
> 2. d64ec841517a25f6d468bde9f67e5b4cffdc67c7
>    r8169: enable internal ASPM and clock request settings

Doesn't help for this problem.

However this fixes a second issue for me:
In 3.7.1 at startup the link came up after 15 sec.:
grep r8169 dmesg.3.7.1
[    1.956842] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
[    1.957059] r8169 0000:02:00.0: irq 42 for MSI/MSI-X
[    1.957161] r8169 0000:02:00.0 eth0: RTL8168evl/8111evl at..
[    1.957163] r8169 0000:02:00.0 eth0: jumbo features [frames..
[   13.575452] r8169 0000:02:00.0 eth0: link down
[   13.575475] r8169 0000:02:00.0 eth0: link down
[   15.181317] r8169 0000:02:00.0 eth0: link up

In 3.8rc the time increased to 24 seconds:
grep r8169 dmesg.3.8.0
[    1.852546] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
[    1.852765] r8169 0000:02:00.0: irq 42 for MSI/MSI-X
[    1.852872] r8169 0000:02:00.0 eth0: RTL8168evl/8111evl at...
[    1.852874] r8169 0000:02:00.0 eth0: jumbo features [frames...
[   14.150212] r8169 0000:02:00.0 eth0: link down
[   14.150229] r8169 0000:02:00.0 eth0: link down
[   24.140263] r8169 0000:02:00.0 eth0: link up

But with this revert I get the old performance:
dmesg | grep r8169
[    1.816613] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
[    1.816832] r8169 0000:02:00.0: irq 42 for MSI/MSI-X
[    1.816947] r8169 0000:02:00.0 eth0: RTL8168evl/8111evl at...
[    1.816948] r8169 0000:02:00.0 eth0: jumbo features [frames...
[   13.986401] r8169 0000:02:00.0 eth0: link down
[   13.986422] r8169 0000:02:00.0 eth0: link down
[   15.623631] r8169 0000:02:00.0 eth0: link up

Thus I recommend to revert this too.

> 3. e0c075577965d1c01b30038d38bf637b027a1df3
>    r8169: enable ALDPS for power saving

That's it! This fixes the problem for me!


Thanks, Jörg
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