Re: [PATCH 25/48] rcu: Mark writes to rcu_sync ->gp_count field

Oleg Nesterov
2024-05-10T13:52:30Z

On 05/10, Oleg Nesterov wrote:
>
> On 05/07, Paul E. McKenney wrote:
> >
> > By the stricter data-race rules used in RCU code [1],
> ...
> > [1] https://docs.google.com/document/d/1FwZaXSg3A55ivVoWffA9iMuhJ3_Gmj_E494dLYjjyLQ/edit?usp=sharing
>
> I am getting more and more confused...
>
> Does this mean that KCSAN/etc treats the files in kernel/rcu/
> differently than the "Rest of Kernel"? Or what?
>
> And how is it enforced?

I can only find the strnstr(buf, "rcu") checks in skip_report(),
but they only cover the KCSAN_REPORT_VALUE_CHANGE_ONLY case...

Oleg.