not sure if this is serial-console-related, but we're only seeing it on our boxen that are serial consoles.
under relatively high network load we are seeing servers running FC2 mostly crash with *no* logging, *no* oops and the serial consoles are dead. at that point the boxes are pingable but they will not fork new processes, will not continue functioning in any other way and will not allow logins.
we've experienced this on three different severs with different hardware, manufacturers and workloads.
is anyone else running into anything similar that they can help with?
we're having to roll back to FC1 on several servers as a result of this problem. troubleshooting help would be appreciated!