On 23-May-2006 Nathan Lynch wrote:

Giuliano Pochini wrote:

quoted

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

So onlining at runtime seems to work.  Did you verify that tasks get
run on the 2nd cpu after you online it?

Yes, I did, and the difference in speed is pretty obvious.

Any other strange messages in dmesg?

Nothing unusual.

Can you online and offline cpus if you boot without maxcpus=1?

It behaves exactly the same. I can't say exactly when it stopped
working. 2.6.14 worked fine.


--
Giuliano.