Re: [patch V3 02/12] rseq: Add fields and constants for time slice extension

[Mathieu Desnoyers]

On 2025-10-29 09:22, Thomas Gleixner wrote:
[...]
> +
> +The thread has to enable the functionality via prctl(2)::
> +
> +    prctl(PR_RSEQ_SLICE_EXTENSION, PR_RSEQ_SLICE_EXTENSION_SET,
> +          PR_RSEQ_SLICE_EXT_ENABLE, 0, 0);

Enabling specifically for each thread requires hooking into thread
creation, and is not a good fit for enabling this from executable or
library constructor function.

What is the use-case for enabling it only for a few threads within
a process rather than for the entire process ?

> +
> +The kernel indicates the grant by clearing rseq::slice_ctrl::reqeust and

reqeust -> request

Thanks,

Mathieu

--
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com