How to use only 2 (out of 4) cores of the Tegra3 system?
I am using Linux/Ubuntu11.04 on CARMA/CUDA devboard (from "seco.com").
On other systems with CONFIG_HOTPLUG_CPU=y (the case of the kernel on my Tegra3 system)
I can shutdown a CPU by, for example,
echo 0 > /sys/devices/system/cpu/cpu2/online
But here I get the following error message:
bash: echo: write error: Device or resource busy
Any other possibilities to restrict the number of cores to 2?
I think modifying the boot options and using, say, "maxcpus=2"
or "isolcpus=2,3" should work as well.
But then, how can I modify the boot options for the board?