netdev - Re: Bug#396185: sky2 freezes in 2.6.17-2-686. Maintainer confirms that it should be fixed in 2.6.19-git tree.

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Date:	Tue, 19 Dec 2006 08:38:59 +0300
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Stephen Hemminger <shemminger@...l.org>
Cc:	maximilian attems <maks@...rnwelten.at>, 396185@...s.debian.org,
	netdev@...r.kernel.org
Subject: Re: Bug#396185: sky2 freezes in 2.6.17-2-686. Maintainer confirms that it should be fixed in 2.6.19-git tree.

On Mon, Dec 18, 2006 at 09:17:28AM -0800, Stephen Hemminger (shemminger@...l.org) wrote:
> > Bug with freeze also exists in 2.6.18-3 (package version 2.6.18-7) - no
> > messages in dmesg, no interrupts.
> > It is dual lan board with only one port being used.
> > rmmod/modprobe sequence brings NIC back to working mode.
> > 
> 
> What are the statistics (ethtool -S eth0) after the hang.
> One user reported a single pause frame being sent. I have can't reproduce
> a hang with similar hardware, so am beginning to wonder if the problem is
> pause negotiation, and interoperability problems??  Maybe the receiver gets
> overloaded and sends one pause frame, but the switch can't really do flow
> control and gets stuck.  I do stress tests with either a direct connect cable,
> or with a switch that does flow control and lots of packets and see the driver/hardware
> successfully doing flow control.
 
Load was quite small - no huge transfers, just usual couple of ssh
sessions to read mails, web. Switch is dlink dgs-1216t gigabit one which
supports flow control (according to dlink spec).

I will dump statistic and registers next time it happens - I do not know
how to reproduce it on demand.
 
> -- 
> Stephen Hemminger <shemminger@...l.org>

-- 
	Evgeniy Polyakov
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