On 30/09/21 00:10, Frederic Weisbecker wrote: > PREEMPT_RT has made rcu_core() preemptible, making it unsafe against > concurrent NOCB (de-)offloading. > > Thomas suggested to drop the local_lock() based solution and simply > check the offloaded state while context looks safe but that's not > enough. Here is a bit of rework. > > git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git > rcu/rt > > HEAD: aac1c58961446c731f2e989bd822ca1fd2659bad > > Thanks, > Frederic FWIW I've had RCU torture with NOCB toggling running for half a day on my Arm Juno and nothing to report. I still need to rebase this on an -rt tree and give it a spin with CONFIG_PREEMPT_RT.
