Further interesting data point: If I specify "nowait" on the command line, I get much better behavior on the 2.6.36 and 2.6.37 kernels. In particular, 2.6.37, which hung after the "Switching to clocksource MIPS" even booting with a single TC, gets far enough to enable swap space even with 4 TCs running. I note that there was historically a problem with getting SMTC to work with the wait-with-interrupts-disabled idle wait mode. I had it working back in 2.5.2x, but something seems to have gotten broken in that 2.6.32 to 2.6.36 interval... Regards, Kevin K.