netdev - Re: sky2 hangs

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Date:	Thu, 1 Feb 2007 14:58:15 -0800
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	"Fagyal Csongor" <concept@...ceptonline.hu>
Cc:	<thomas@...nzmann.de>, <linux-kernel@...r.kernel.org>,
	<netdev@...r.kernel.org>
Subject: Re: sky2 hangs

I can reproduce the problem now (on mac mini). Interestingly it seems to whack
the whole ethernet switch when it happens.
> 
> - a previously suggested fix - passing idle=poll to the kernel - did not
> work for me at the end

It is not an MSI or IRQ problem. It is a phy problem (see below).

> - the locks I have happen very periodically (somewhere around every 22-28
> hours), as if the chip would die after a given amount of data transferred;
> I know this looks stupid but I thought I might mention it
> - I have about 1Mbit/s of (incoming) traffic on this interface: with
> short, very high peaks, as there is a MySQL server on the other end,
> receiving about 100 queries per second
> - unloading the sky2 module totally freezes the computer for me

If you do:
	ethtool -r eth0
it cause a PHY reset (renegotiation) and clears the problem.


-- 
Stephen Hemminger <shemminger@...ux-foundation.org>
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