Re: [PATCH] doc: Add CPU Isolation documentation

[Sebastian Andrzej Siewior]

On 2025-08-09 11:42:47 [+0200], Frederic Weisbecker wrote:
…
> --- /dev/null
> +++ b/Documentation/admin-guide/cpu-isolation.rst
> @@ -0,0 +1,338 @@
…
> +CPUSET configuration (cgroup v2)
> +--------------------------------
> +
> +Assuming cgroup v2 is mounted to /sys/fs/cgroup, the following script
> +isolates CPU 7 from scheduler domains.
> +
> +  cd /sys/fs/cgroup
> +  # Activate the cpuset subsystem
> +  echo +cpuset > cgroup.subtree_control
> +  # Create partition to be isolated
> +  mkdir test
> +  cd test
> +  echo +cpuset > cgroup.subtree_control
> +  # Isolate CPU 7
> +  echo 7 > cpuset.cpus
> +  echo "isolated" > cpuset.cpus.partition

while looking at this again, shouldn't you also do
	echo 7 > cpuset.cpus.exclusive

to ensure the CPU isn't used somewhere else?

Sebastian