Kernel code, user-space code is always preemptible. | Hacker News

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		GrayShade 10 months ago \| parent \| context \| favorite \| on: The long road to lazy preemption in the Linux CPU ... Kernel code, user-space code is always preemptible.

fguerraz 10 months ago [–]

Not true when the user-space thread has RT priority.

temac 10 months ago | [–]

RT threads can be prempted by higher prio RT, and IIRC some kernel threads run at the highest prio. Plus you can be prempted by SMI, an hypervisor, etc

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