On Tue, 2022-02-22 at 11:47 -0300, Marcelo Tosatti wrote: > For the per-CPU LRU page vectors, augment the local lock protected > code sections with rcu_read_lock. > > This makes it possible to replace the queueing of work items on all > CPUs by synchronize_rcu (which is necessary to run FIFO:1 applications > uninterrupted on isolated CPUs). I don't think this is needed. In RT local_locks use a spinlock. See kernel/locking/spinlock_rt.c: "The RT [spinlock] substitutions explicitly disable migration and take rcu_read_lock() across the lock held section." Regards, -- Nicolás Sáenz
