Re: [PATCH] rcu: Allow rcu_irq_enter_check_tick() from NMI

2020-11-16 Thread Paul E. McKenney
On Mon, Nov 16, 2020 at 06:24:31PM +0100, Thomas Gleixner wrote: > On Mon, Nov 16 2020 at 13:10, Peter Zijlstra wrote: > > > Any which way around; here's a proper patch... > > > > --- > > > > Subject: rcu: Allow rcu_irq_enter_check_tick() from NMI > > From: Peter Zijlstra > > Date: Mon Nov 16

Re: [PATCH] rcu: Allow rcu_irq_enter_check_tick() from NMI

2020-11-16 Thread Thomas Gleixner
On Mon, Nov 16 2020 at 13:10, Peter Zijlstra wrote: > Any which way around; here's a proper patch... > > --- > > Subject: rcu: Allow rcu_irq_enter_check_tick() from NMI > From: Peter Zijlstra > Date: Mon Nov 16 12:54:56 CET 2020 > > Eugenio managed to tickle #PF from NMI context which resulted

[PATCH] rcu: Allow rcu_irq_enter_check_tick() from NMI

2020-11-16 Thread Peter Zijlstra
Any which way around; here's a proper patch... --- Subject: rcu: Allow rcu_irq_enter_check_tick() from NMI From: Peter Zijlstra Date: Mon Nov 16 12:54:56 CET 2020 Eugenio managed to tickle #PF from NMI context which resulted in hitting a WARN in RCU through irqentry_enter() ->