Re: [stable-6.6.y] mm: khugepaged refuses to freeze

[David Hildenbrand (Arm)]

> > I recall that there is a notifier when the system is preparing to 
> > sleep (pm notifier or something). Could we simply hook into that to 
> > tell khugepaged to suspend+resume?
>
> Do you mean “struct dev_pm_ops”, which is used to register PM callbacks 
> for devices? However, I don’t know how to use it with a kernel thread.
>
> Also look at how kswapd does it, kswapd also uses 
> kthread_freezable_should_stop() to check the freeze state.

Right, mimicking what kswapd does sound reasonable!

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Cheers,

David