Jeff got me a stack of 2GB drives so they will be the Linux hosts in the 8 clients. Trying to find a camera of some sort to get some pictures of this set-up on the indep. study web page.. it'd be a nice touch, I think.
jiffies wraps (over 300 just grep'ing for "jiffies -") are all over recent kernels. I can't see why jiffies - last > 5*HZ is still accepted, as using time_before/time_after can (as include/linux/timer.h notes) generate better code (and gcc 2.95.x may make this a reality) than the current situation. Honestly, time_before(jiffies,last+5*HZ) seems valid and even more readable is it's comparing the always-volatile current counter against a value that's both likely to already be in a register and an expression that doesn't include anything volatile. One part is constant, the other doesn't change much. Because of this, we actually end up with more accuracy since we do the comparison on jiffies itself and not the output of a computation involving jiffies.
Ugh, I need more caffeine.
At least everything's set for the trip to Phoenix