[PATCH] doc: nohz_full already implies rcu_nocbs
Thomas Monjalon
thomas at monjalon.net
Wed Mar 16 20:01:46 CET 2022
08/02/2022 04:50, Tudor Brindus:
> From Documentation/admin-guide/kernel-parameters.txt, specifically the
> last sentence:
>
> nohz_full= [KNL,BOOT,SMP,ISOL]
> The argument is a cpu list, as described above.
> In kernels built with CONFIG_NO_HZ_FULL=y, set
> the specified list of CPUs whose tick will be stopped
> whenever possible. The boot CPU will be forced outside
> the range to maintain the timekeeping. Any CPUs
> in this list will have their RCU callbacks offloaded,
> just as if they had also been called out in the
> rcu_nocbs= boot parameter.
>
> The kernel or-s the nohz_full cpumask into the rcu_nocbs cpumask at
> startup, and uses that.
>
> Signed-off-by: Tudor Brindus <me at tbrindus.ca>
Applied, thanks.
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