rcu: Avoid running boost kthreads on isolated CPUs

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When the boost kthreads are created on systems with nohz_full CPUs,
the cpus_allowed_ptr is set to housekeeping_cpumask(HK_FLAG_KTHREAD).
However, when the rcu_boost_kthread_setaffinity() is called, the original
affinity will be changed and these kthreads can subsequently run on
nohz_full CPUs.  This commit makes rcu_boost_kthread_setaffinity()
restrict these boost kthreads to housekeeping CPUs.

Signed-off-by: Zqiang <qiang.zhang1211@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

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Zqiang 2021-11-15 13:15:46 +08:00 • committed by Paul E. McKenney

parent 17ea371882

commit c2cf0767e9

1 changed files with 2 additions and 1 deletions

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kernel/rcu/tree_plugin.h

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