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isolcpus kernel parameter is ignored - make use of one STM32MP257 core only?

HMüll.4
Associate III

Hi,

I'm trying to run the whole ST-Linux-stuff on one core only to have the other one available for a time-consuming application. However, it seems the kernel-parameter isolcpus is not used, dmesg gives an output

[    0.000000] Kernel command line: root=PARTUUID=e91c4e10-16e6-4c0e-bd0e-77becf4a3582 rootwait rw   earlycon console=ttySTM0,115200 isolcpus=0
[    0.000000] Unknown kernel command line parameters "isolcpus=0", will be passed to user space.
[    2.309368]     isolcpus=0

The message is correct, also with this parameter set, the processes are spread over all cores.

What could be the problem here? 

Thanks!

 

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