https://bugzilla.novell.com/show_bug.cgi?id=356201 User seife@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=356201#c1 --- Comment #1 from Stefan Seyfried 2008-01-25 02:21:23 MST --- Created an attachment (id=191790) --> (https://bugzilla.novell.com/attachment.cgi?id=191790) /var/log/messages excerpt, including sysrq-t traces of the last two hangs -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=356201 User seife@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=356201#c3 --- Comment #3 from Stefan Seyfried 2008-01-28 00:34:09 MST --- some more observations: Today, it did not hang. I had booted at home (WLAN interface "air", ipw2200 driver), started openvpn, had it running for two days, stopped openvpn this morning. "stopping openvpn... failed". However, surprise - no "waiting for interface...". Then i did "rmmod ipw2200" to conserve power, which first seemed to hang. Looking in syslog showed me "waiting for interface air to become free". When i just wanted to fire up syrq-t and then reboot, i found that it eventually succeeded. So it might be some race condition hiding somewhere which just gets exposed much more often recently? Log messages: Jan 28 06:43:49 susi openvpn[19419]: event_wait : Interrupted system call (code=4) Jan 28 06:43:49 susi openvpn[19419]: SIGTERM received, sending exit notification to peer Jan 28 06:44:42 susi klogd: [212744.599578] SysRq : HELP : loglevel0-8 reBoot Crashdump tErm Full kIll saK showMem Nice powerOff showPc show-all-timers(Q) unRaw Sync showTasks Unmount shoW-blocked-tasks Jan 28 06:45:49 susi network: Checking for the NetworkManager: Jan 28 06:45:49 susi network: Checking for the NetworkManagerDispatcher: Jan 28 06:45:49 susi network: NetControl System is active as well. Check your config or restart network. Jan 28 06:45:55 susi network: Checking for the NetworkManager: Jan 28 06:45:55 susi network: Checking for the NetworkManagerDispatcher: Jan 28 06:45:55 susi network: NetControl System is active as well. Check your config or restart network. Jan 28 06:46:01 susi smpppd[5454]: terminating on signal 15 Jan 28 06:46:02 susi ifdown: air device: Intel Corporation PRO/Wireless 2200BG Network Connection (rev 0 5) Jan 28 06:46:02 susi avahi-daemon[2504]: Withdrawing address record for 192.168.200.11 on air. Jan 28 06:46:02 susi avahi-daemon[2504]: Leaving mDNS multicast group on interface air.IPv4 with address 192.168.2 00.11. Jan 28 06:46:02 susi avahi-daemon[2504]: Interface air.IPv4 no longer relevant for mDNS. Jan 28 06:46:02 susi avahi-daemon[2504]: Withdrawing address record for fe80::212:f0ff:fe8b:e39f on air. Jan 28 06:46:02 susi ifplugd(cable)[18545]: Exiting. Jan 28 06:46:02 susi ifdown: cable device: Intel Corporation 82540EP Gigabit Ethernet Controller (Mobile) (rev 03) Jan 28 06:46:02 susi ifdown: irda0 Jan 28 06:46:02 susi ifdown: No configuration found for irda0 Jan 28 06:46:02 susi ifdown: Nevertheless the interface will be shut down. Jan 28 06:46:03 susi ifdown: air device: Intel Corporation PRO/Wireless 2200BG Network Connection (rev 0 5) Jan 28 06:46:03 susi ifdown: cable device: Intel Corporation 82540EP Gigabit Ethernet Controller (Mobile) (rev 03) Jan 28 06:46:03 susi ifdown: irda0 Jan 28 06:46:03 susi ifdown: No configuration found for irda0 Jan 28 06:46:03 susi ifdown: Nevertheless the interface will be shut down. Jan 28 06:46:05 susi network: Starting the NetworkManagerDispatcher Jan 28 06:46:05 susi network: Starting the NetworkManager Jan 28 06:46:05 susi smpppd[14743]: smpppd version 1.59 started Jan 28 06:46:05 susi ifdown: Network interface is managed from NetworkManager Jan 28 06:46:05 susi ifdown: NetworkManager cannot be advised to take down an interface. Jan 28 06:46:05 susi ifdown: Set up another interface instead. Jan 28 06:46:16 susi klogd: [212869.190278] unregister_netdevice: waiting for air to become free. Usage count = 1 Jan 28 06:46:26 susi klogd: [212879.441743] unregister_netdevice: waiting for air to become free. Usage count = 1 Jan 28 06:46:33 susi syslog-ng[1988]: STATS: dropped 0 -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=356201 User seife@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=356201#c5 Stefan Seyfried changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |fseidel@novell.com --- Comment #5 from Stefan Seyfried 2008-01-28 06:46:18 MST --- Next try. Booted, dialed in via rfcomm/pppd. Started openvpn, used it for a few hours. Stopped openvpn (which did not fail). Waited a minute, then stopped pppd (which hung with "waiting for modemB to become free. Usage count = 1"). I packed the machine up and went to the office. There it was still waiting, 40 minutes later. So i tried to investigate: root@susi:/dev# cat net/tun cat: net/tun: File descriptor in bad state pppd was still hanging in state "D". So i tried to kill all programs that were potentially accessing a network socket (i had switched kopete and konversation to offline mode before shutting down the ppp connection already). I killed the two ruby scripts spawned by amarok to fetch lyrics from the 'net and voila - pppd exited and the "waiting for modemB to become free" stopped. I also have a sysrq-T trace if deemed useful, which shows (to my untrained eye) that all the processes which are in state D are hanging somewhere around "netdev_run_todo" function. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=356201 User seife@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=356201#c7 --- Comment #7 from Stefan Seyfried 2008-01-29 02:09:04 MST --- I did update to STABLE yesterday which has 2.6.24, and additionally did prevent the loading of ipv6.ko (a hint from fseidel). Today this has worked fine. I'll load ipv6.ko this evening before going home and then try again. I am pretty sure this is a frequently reoccuring heisenbug (i have seen this since SuSE 9.0 from time to time, but i was never able to reproduce) and that i am just "lucky" now that i can reproduce it all the time, but i might be wrong and that were different bugs every time which got fixed. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=356201 User seife@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=356201#c9 Stefan Seyfried changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |NEW Info Provider|seife@novell.com | --- Comment #9 from Stefan Seyfried 2008-01-29 13:54:38 MST --- It works better with 2.6.24-2-default, so maybe the last-minute-revert of the offending patch actually fixed it. If Frank also cannot find any problems, we can probably set this one to fixed. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.