linux-kernel - Re: sky2 PHY setup

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Date:	Fri, 16 Mar 2007 14:36:45 -0600
From:	Rob Sims <lkml-z@...sims.com>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
Cc:	Thomas Glanzmann <thomas@...nzmann.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Andreas Allgöwer <andreas.allgoewer@....de>,
	Michael Gernoth <simigern@....informatik.uni-erlangen.de>
Subject: Re: sky2 PHY setup

On Fri, Mar 16, 2007 at 09:59:32AM -0700, Stephen Hemminger wrote:
> On Fri, 16 Mar 2007 01:29:12 +0100
> Thomas Glanzmann <thomas@...nzmann.de> wrote:
> 
> > Hello Stephen,
> > 
> > > yesterday I pulled from Linus tree because I saw the sky2 updated and I
> > > tried to break it but it seems that my problems are gone. I let you know
> > > if anything pops up in the future.
> > 
> > bad news. I today tried the sky2 driver which is in Linus Kernel Tree
> > (HEAD) on a machine with very high network load and it stopped working
> > without any kernel messages after doing a flawless job under high load
> > for 5 hours. My watchdog rebooted the machine after 500 seconds. ;-(
> > 
> >         Thomas
> 
> I have run for 2+ days under load without problems. It is hard to
> reproduce or do much about your problem without more info.

Are there some debug hooks that can be activated?  My sky2 stops
responding (very light load) about twice a day.  The netdev watchdog
notices after a while and is able to reactivate the interface:

Mar 15 13:28:12 btd kernel: NETDEV WATCHDOG: eth0: transmit timed out
Mar 15 13:28:12 btd kernel: sky2 eth0: tx timeout
Mar 15 13:28:12 btd kernel: sky2 eth0: transmit ring 458 .. 435 report=458 done=458
Mar 15 13:28:12 btd kernel: sky2 eth0: disabling interface
Mar 15 13:28:12 btd kernel: sky2 eth0: enabling interface
Mar 15 13:28:12 btd kernel: sky2 eth0: ram buffer 48K
Mar 15 13:28:15 btd kernel: sky2 eth0: Link is up at 1000 Mbps, full duplex, flow control both

This machine is a Core2 Duo e6700, and the interface is:
03:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8053 PCI-E Gigabit Ethernet Controller (rev 20)
to 1 Gb hub.

On a Pentium 4, with:
02:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8053 PCI-E Gigabit Ethernet Controller (rev 15)
I have no issues, but with a very light network load, 100 Mb/s hub..

Each machine has two identical interfaces; only one has a cable in it.

Both machines can be used for testing/debug.
-- 
Rob

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