On Fri, Apr 17, 2020 at 09:26:56AM -0400, Qian Cai wrote:
> > Acked-by: Michael Ellerman (powerpc)
>
> Peter, can you take a look at this patch when you have a chance?
Sorry, -ETOOMUCHEMAIL, got it now, thanks!
> On Apr 2, 2020, at 7:24 AM, Michael Ellerman wrote:
>
> Qian Cai writes:
>> From: Peter Zijlstra
>>
>> In the CPU-offline process, it calls mmdrop() after idle entry and the
>> subsequent call to cpuhp_report_idle_dead(). Once execution passes the
>> call to rcu_report_dead(), RCU is
On Thu, Apr 02, 2020 at 12:19:54PM -0400, Qian Cai wrote:
>
>
> > On Apr 2, 2020, at 11:54 AM, Paul E. McKenney wrote:
> >
> > I do run this combination quite frequently, but only as part of
> > rcutorture, which might not be a representative workload. For one thing,
> > it has a minimal
> On Apr 2, 2020, at 11:54 AM, Paul E. McKenney wrote:
>
> I do run this combination quite frequently, but only as part of
> rcutorture, which might not be a representative workload. For one thing,
> it has a minimal userspace consisting only of a trivial init program.
> I don't recall
On Thu, Apr 02, 2020 at 10:00:16AM -0400, Qian Cai wrote:
>
>
> > On Apr 2, 2020, at 7:24 AM, Michael Ellerman wrote:
> >
> > Qian Cai writes:
> >> From: Peter Zijlstra
> >>
> >> In the CPU-offline process, it calls mmdrop() after idle entry and the
> >> subsequent call to
> On Apr 2, 2020, at 7:24 AM, Michael Ellerman wrote:
>
> Qian Cai writes:
>> From: Peter Zijlstra
>>
>> In the CPU-offline process, it calls mmdrop() after idle entry and the
>> subsequent call to cpuhp_report_idle_dead(). Once execution passes the
>> call to rcu_report_dead(), RCU is
Qian Cai writes:
> From: Peter Zijlstra
>
> In the CPU-offline process, it calls mmdrop() after idle entry and the
> subsequent call to cpuhp_report_idle_dead(). Once execution passes the
> call to rcu_report_dead(), RCU is ignoring the CPU, which results in
> lockdep complaining when mmdrop()
From: Peter Zijlstra
In the CPU-offline process, it calls mmdrop() after idle entry and the
subsequent call to cpuhp_report_idle_dead(). Once execution passes the
call to rcu_report_dead(), RCU is ignoring the CPU, which results in
lockdep complaining when mmdrop() uses RCU from either memcg or
