Re: amd iommu: rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 8 jiffies s: 113 root: 0x1/.

[Borislav Petkov]

On Wed, Dec 03, 2025 at 09:16:37AM -0800, Paul E. McKenney wrote:
> Or to some value that works for you.  But if you are not looking to be
> an expedited RCU CPU stall-warning pioneer, yes, setting it to zero is
> a good approach.
> 
> If you would like to be a more sane pioneer, setting it to (say) 11000
> (or 11 seconds) could be appropriate.  But what fun is sanity?  ;-)

Oh, I have a lot of excitement even without RCU experiments. :-P

But if you need me to try things, lemme know.

For now I've simply reset the values as to what defconfig sets them to:

CONFIG_RCU_CPU_STALL_TIMEOUT=21
CONFIG_RCU_EXP_CPU_STALL_TIMEOUT=0

Thx.

-- 
Regards/Gruss,
    Boris.

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