On Thu, 1 Feb 2007 19:55:32 +0100 Thomas Glanzmann <[EMAIL PROTECTED]> wrote:
> 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 have a question to this: I wonder why the Linux Kernel (no longer?) > increments the use counter of an ethernet driver (I saw it on sky2 and > e1000) when the interface is up, running and configured? I can unload > the sky2 driver without doing a 'ifconfig eth0 down' beforehand. Could > somone provide me with background on this fact? It was intentional in 2.6 to allow interfaces to be hot-removed. Remember with Internet protocols there is no hard binding (normally) between address and device and connections should not go down if link fails. > > With that everything works. If somone is interested in my userland > watchdog, just send me an E-Mail. Hopefully, it won't be necessary for long. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
