Skip to content
Commit db4cb768 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

doc: Remove obsolete kernel-per-CPU-kthreads RCU_FAST_NO_HZ advice



This document advises building with both CONFIG_NO_HZ=y and
CONFIG_RCU_FAST_NO_HZ=y.  However, CONFIG_NO_HZ=y offloads callbacks from
all nohz_full CPUs, and CPUs with offloaded callbacks do not benefit from
CONFIG_RCU_FAST_NO_HZ=y.  Quite the opposite: CONFIG_RCU_FAST_NO_HZ=y
simply adds a bit of idle entry/exit overhead.

This commit therefore changes that advice to only CONFIG_NO_HZ=y.

Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 8c0abfd6
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment