Re: [PATCH] sched/core: Update kernel boot parameters for LAZY preempt.

[Shrikanth Hegde <sshegde@linux.ibm.com>]

On 11/22/24 23:05, Sebastian Andrzej Siewior wrote:
> Update the documentation for the `preempt=' parameter which now also
> accepts `lazy'.
> 
> Fixes: 7c70cb94d29cd ("sched: Add Lazy preemption model")
> Reported-by: Shrikanth Hegde <sshegde@linux.ibm.com>
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> ---
>   Documentation/admin-guide/kernel-parameters.txt | 5 +++++
>   1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 9cd9cd06538bf..23d9bd5ea7e47 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -4818,6 +4818,11 @@
>   			       can be preempted anytime.  Tasks will also yield
>   			       contended spinlocks (if the critical section isn't
>   			       explicitly preempt disabled beyond the lock itself).
> +			lazy - Scheduler controlled. Similar to full but instead
> +			       of preempting the task immediately, the task gets
> +			       one HZ tick time to yield itself before the
> +			       preemption will be forced. One preemption is when the
> +			       task returns to user space.
>   
>   	print-fatal-signals=
>   			[KNL] debug: print fatal signals

Reviewed-by: Shrikanth Hegde <sshegde@linux.ibm.com>