Changing bootargs parameters

While creating configuring my zedboard project, i am changing kernel bootargs and saved it.

bootargs = "console=ttyPS0,115200 maxcpus=1"

But when i boot the board, there is no change.

What is the procedure to change the bootarg, so that i can keep only one cpu active??

0 zedhed over 10 years ago

Hi Darshan,

This is an almost duplicate post of this one here where you ask about two separate topics, one of them being this same topic you post about above:

http://microzed.org/content/changing-bootargs-parameters

I suggested that you take a look at this thread here where michalsimek suggested that after booting, some userspace process could be enabling additional CPUs using HOTPLUG:

https://github.com/Xilinx/linux-xlnx/issues/58

Also, after researching this a bit, I found that there is another option which may work better for what you want. Take a look at this page here and search for "nr_cpus=":

https://www.kernel.org/doc/Documentation/kernel-parameters.txt

Could you try one or both of these to see if that resolves the issue you are seeing?

Regards,

-Kevin
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0 Former Member over 10 years ago

Hi Kevin Keryk,

Now i am able to edit the bootargs = "console=ttyPS0,115200 maxcpus=1" parameters.
And also able to boot the board.

The problem was that i was changing the bootargs parameters in system.dts file.
But instead we need to change the bootargs parameters in system-config.dtsi file.
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