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
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
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
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.
An alternative would be to hold the hotplug rwsem (so the CPUs don't
change their state) and then check
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