Re: [PATCH v1] docs: sysctl: timer_migration is for hrtimer only

[Jonathan Corbet <corbet@lwn.net>]

Costa Shulyupin <costa.shul@redhat.com> writes:

> Since commit b2cf7507e1864 ("timers: Always queue timers on the local
> CPU") __mod_timer() no longer depends on timers_migration_enabled.  Only
> high-resolution timer migration from isolated to housekeeping CPUs
> depends on it.
>
> Update and clarify the documentation accordingly.
>
> Signed-off-by: Costa Shulyupin <costa.shul@redhat.com>
> ---
>  Documentation/admin-guide/sysctl/kernel.rst | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
> index b6328cd0f43e..fb38d654846d 100644
> --- a/Documentation/admin-guide/sysctl/kernel.rst
> +++ b/Documentation/admin-guide/sysctl/kernel.rst
> @@ -1609,8 +1609,10 @@ If a value outside of this range is written to ``threads-max`` an
>  timer_migration
>  ===============
>  
> -When set to a non-zero value, attempt to migrate timers away from idle cpus to
> -allow them to remain in low power states longer.
> +When set to a non-zero value, attempt to migrate high-resolution timers from
> +nohz isolated (nohz_full) to housekeeping CPUs.
> +See Documentation/admin-guide/cpu-isolation.rst
> +and Documentation/admin-guide/kernel-parameters.rst.

Applied, thanks.

jon