Re: [RFC PATCH] kprobes: Use synchronize_rcu_tasks_rude in kprobe_optimizer

[Yang Jihong]

Hello,

On 2024/2/4 6:00, Paul E. McKenney wrote:
> On Mon, Jan 29, 2024 at 08:58:10AM +0800, Yang Jihong wrote:
> > Hello,
> >
> > On 2024/1/28 3:22, Paul E. McKenney wrote:
> > > On Tue, Jan 09, 2024 at 07:28:29PM +0800, Yang Jihong wrote:
> > > > Hello,
> > > >
> > > > PING.
> > > >
> > > > I had a similar problem. Is this solution feasible?
> > >
> > > Sadly, no.
> > >
> > > It fails on CONFIG_PREEMPT=y kernels because synchronize_rcu_tasks_rude()
> > > will not wait on tasks that have been preempted while executing in
> > > a trampoline.
> > >
> > > But could you please try out the patch shown at the end of this email?
> >
> > Thanks for the patch, yes, I've tested and it solves the problem.
>
> Very good, and thank you for testing it!
>
> May I apply your Tested-by to the commit to record your efforts for
> posterity?
Sure absolutely.

Tested-by: Yang Jihong <yangjihong1@xxxxxxxxxx>

Thanks,
Yang