CPU 1 refused to die!

[Giuliano Pochini]

I booted with maxcpus=1, then I enabled the 2nd cpu
with echo 1 > /sys/devices/system/cpu/cpu1/online

I can't disable it anymore. dmesg says "CPU 1 refused to die!".
/proc/cpuinfo and /proc/interrupts show one cpu only and the tasks run on
one cpu after the echo 0 > /sys/... , but since the command takes a couple
of seconds to complete I think it's not simply a bogus error message.

Dual G4 MDD
Linux Jay 2.6.16.16 #8 SMP Sat May 13 19:15:05 CEST 2006 ppc 7455,
altivec supported PowerMac3,6 GNU/Linux

--
Giuliano.