On Fri, Oct 08, 2021 at 03:03:02PM +0100, Valentin Schneider wrote: > On 01/10/21 18:47, Valentin Schneider wrote: > > 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. > > Rebased on top of v5.15-rc4-rt7-rebase with Thomas' patch reverted and ran > the same thing under CONFIG_PREEMPT_RT, nothing seems to catch on fire, so: > > Tested-by: Valentin Schneider <valentin.schneider@xxxxxxx> Thank you!!! Thanx, Paul
