maxcpus kernel parameter is not working as expected as RHEL 7 system still has all CPUs enabled after boot is complete

Log in to Your Red Hat Account

Your Red Hat account gives you access to your profile, preferences, and services, depending on your status.

If you are a new customer, register now for access to product evaluations and purchasing capabilities.

Need access to an account?

If your company has an existing Red Hat account, your organization administrator can grant you access.

If you have any questions, please contact customer service.

Red Hat Account Number:

Red Hat Account

Customer Portal

For your security, if you’re on a public computer and have finished using your Red Hat services, please be sure to log out.

Log Out

Select Your Language

Issue

The maxcpus kernel boot parameter is not working as expected because all CPUs are active once system is booted.

Environment

Red Hat Enterprise Linux (RHEL) 7
- systemd-208-20.el7 (or later)

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.

Current Customers and Partners

New to Red Hat?

Learn more about Red Hat subscriptions

Here are the common uses of Markdown.

Code blocks

~~~
Code surrounded in tildes is easier to read
~~~

Links/URLs

[Red Hat Customer Portal](https://access.redhat.com)

Log in to Your Red Hat Account

Red Hat Account

Customer Portal

Select Your Language

Support

Services

Knowledge

Ecosystem

Red Hat Customer Portal Labs

Additional Tools

Red Hat Insights

Red Hat Product Security Center

Security Updates

Resources

Discussions

Blogs

Customer Events

Stories