sched/isolation: Make "isolcpus=nohz" equivalent to "nohz_full"

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The "isolcpus=nohz" boot parameter and flag were used to disable tick
when running a single task.  Nowsdays, this "nohz" flag is seldomly used
as it is included as part of the "nohz_full" parameter.  Extend this
flag to cover other kernel noises disabled by the "nohz_full" parameter
to make them equivalent. This also eliminates the need to use both the
"isolcpus" and the "nohz_full" parameters to fully isolated a given
set of CPUs.

Suggested-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20241030175253.125248-3-longman@redhat.com

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Waiman Long 2024-10-30 13:52:51 -04:00 • committed by Peter Zijlstra

parent ae5c677729

commit 1174b9344b

2 changed files with 8 additions and 2 deletions

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4

Documentation/admin-guide/kernel-parameters.txt

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6

kernel/sched/isolation.c

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