On Wed, Sep 03, 2025 at 11:31:12AM -0400, Steven Rostedt wrote:
> On Wed, 3 Sep 2025 03:31:31 -0700
> "Paul E. McKenney" <[email protected]> wrote:
>
> > > by applying the patch, the issue gone. but since you said this is a
> > > 'diagnostic
> > > patch', not sure if it's a real fix. anyway:
> > >
> > > Tested-by: kernel test robot <[email protected]>
> >
> > Thank you very much! This tells me that something on the code path from
> > the tracepoint to the BPF program needs to have preemption disabled.
> > I will leave the diagnostic patch in my tree, and will be looking into
> > what the real fix should be.
>
> Was it a BPF program that triggered this? I couldn't get that from the
> backtrace. Also, is this only a x86 32bit issue?
Excellent question, now that you mention it! Your thought is that
one of the other preemption-disablings might need to be moved?
Thanx, Paul
