Re: [PATCH 1/3] srcu: use cpu_online() instead custom check

2017-09-28 Thread Paul E. McKenney
On Thu, Sep 28, 2017 at 06:02:08PM +0200, Sebastian Andrzej Siewior wrote: > On 2017-09-22 11:43:14 [-0700], Paul E. McKenney wrote: > > On Fri, Sep 22, 2017 at 05:28:04PM +0200, Sebastian Andrzej Siewior wrote: > > > The current check via srcu_online is slightly racy because after looking > > > at

Re: [PATCH 1/3] srcu: use cpu_online() instead custom check

2017-09-28 Thread Sebastian Andrzej Siewior
On 2017-09-22 11:43:14 [-0700], Paul E. McKenney wrote: > On Fri, Sep 22, 2017 at 05:28:04PM +0200, Sebastian Andrzej Siewior wrote: > > The current check via srcu_online is slightly racy because after looking > > at srcu_online there could be an interrupt that interrupted us long > > enough until

Re: [PATCH 1/3] srcu: use cpu_online() instead custom check

2017-09-22 Thread Paul E. McKenney
On Fri, Sep 22, 2017 at 05:28:04PM +0200, Sebastian Andrzej Siewior wrote: > The current check via srcu_online is slightly racy because after looking > at srcu_online there could be an interrupt that interrupted us long > enough until the CPU we checked against went offline. But in that case, woul