[Intel-gfx] [BUG?] INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-.... } 3 jiffies s: 309 root: 0x1/.

[Rui Salvaterra]

Hi, Paul,

On Thu, 13 Apr 2023 at 15:43, Paul E. McKenney <paulmck at kernel.org> wrote:
>
> My guess would be that you have CONFIG_RCU_EXP_CPU_STALL_TIMEOUT set to
> some small non-zero number, for example, you might have set up a recent
> Android .config or some such.  The default of zero would give you about
> 21 seconds rather than the three jiffies that you are seeing.
>
> Could you please check your .config?

Well, this is embarrassing. I can't fathom why/how, but I had it set
to 20, on this machine. That is, 20 millisseconds. I guess its a
miracle I haven't seen *more* expedited RCU traces. Sorry for the
noise, everyone.

Kind regards,
Rui