* Ingo Molnar <[EMAIL PROTECTED]> wrote: > ugh. Something really weird happened with this e1000 problem. > > i crashed the laptop in a weird way and had to power-cycle it in an > unusual fashion. After that i wanted to try your latest BUG_ON() > theory but the network hang went away! > > For 3 hours i tried to reproduce the hang (i went back to the original > git tree and the .config under which i found it, i power cycled it > again, i unplugged the power cord to make it go off battery, unplugged > the ethernet, recreated a completely new tree, etc. etc.) but with no > success! Total Heisenbug - and the really annoying thing is that you > just had a good theory about what might be happening. I'm now at > kernel build iteration #75 in this tree ...
ah! Just found the reason: the bug apparently depends on the precise kernel command-line contents. I accidentally dropped ignore_loglevel (found this while comparing with the older logs i sent to you), adding it back in produces hung networking too. So it appears that a netconsole printout while e1000 is initializing (or while some other networking component is initializing) might be the culprit? Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/