Document the subtly changed relationship between cpusets and isolcpus.
Turns out the old documentation did not match the code...
Signed-off-by: NRik van Riel <riel@redhat.com>
Suggested-by: NPeter Zijlstra <peterz@infradead.org>
Acked-by: NZefan Li <lizefan@huawei.com>
Signed-off-by: NTejun Heo <tj@kernel.org>