linux-kernel - Re: sky2 hangs

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Date:	Thu, 1 Feb 2007 23:46:23 +0100 (CET)
From:	"Fagyal Csongor" <concept@...ceptonline.hu>
To:	<thomas@...nzmann.de>
Cc:	<linux-kernel@...r.kernel.org>, <shemminger@...ux-foundation.org>,
	<netdev@...r.kernel.org>
Subject: Re: sky2 hangs

> Hello,
> I have a sky2 network card in my intel mac mini. It stops working when I
> do havy network load like watching a divx over http/sshfs. However if I
> remove the driver module and load it again it works and even the tcp
> connection doesn't get shutdown. I automated the above procedure using a
> userland watchdog which basically does the same thing and is written
> entirely by me, because the traditional watchdog wasn't that reliable
> and did a lot of false positives:
>
>         * Look every ten seconds if my default router is pingable (3
>           pings, one has to get back).
>                 If it isn't the case I call network_fix script (it calls
> the script only once after a ping gets lost. To run the
> script again at least one ping has to arrive again)
>
>                 (mini) [~] cat /usr/local/sbin/fix_network
>                 #!/bin/bash
>
>                 export PATH=/bin:/usr/bin:/usr/sbin:/sbin
>
>                 rmmod sky2
>                 modprobe sky2
>                 ifdown eth0
>                 ifup eth0
>
>                 If after that no ping is received from the default
> router for another 90 seconds I tell init to reboot and
> stop feeding the kernel software watchdog.
>
>         * My watchdog also checks if sshd process is running. If it is
>           down for more than 100 seconds it reboots the machine, too.
>
> Jan 27 22:35:35 mini watchdog-tg[4146]: No PONG received from
> 192.168.0.3 (failure 1 of 10) Jan 27 22:35:35 mini watchdog-tg[4146]:
> Running fix_network script. Jan 27 22:38:46 mini watchdog-tg[4146]: No
> PONG received from 192.168.0.3 (failure 1 of 10) Jan 27 22:38:46 mini
> watchdog-tg[4146]: Running fix_network script. Jan 27 22:44:17 mini
> watchdog-tg[4146]: No PONG received from 192.168.0.3 (failure 1 of 10)
> Jan 27 22:44:17 mini watchdog-tg[4146]: Running fix_network script. Jan
> 29 12:00:13 mini watchdog-tg[4146]: No PONG received from 192.168.0.3
> (failure 1 of 10) Jan 29 12:00:13 mini watchdog-tg[4146]: Running
> fix_network script. Jan 29 19:18:59 mini watchdog-tg[4146]: No PONG
> received from 192.168.0.3 (failure 1 of 10) Jan 29 19:18:59 mini
> watchdog-tg[4146]: Running fix_network script. Jan 31 15:56:29 mini
> watchdog-tg[4146]: No PONG received from 192.168.0.3 (failure 1 of 10)
> Jan 31 15:56:29 mini watchdog-tg[4146]: Running fix_network script. Feb
> 1 08:56:57 mini watchdog-tg[4146]: No PONG received from 192.168.0.3
> (failure 1 of 10) Feb  1 08:56:57 mini watchdog-tg[4146]: Running
> fix_network script.
[...]

I would like to add a few things:

- a previously suggested fix - passing idle=poll to the kernel - did not
work for me at the end
- 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



- Fagzal


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