Hi,
On 2025-06-23 16:48:27 +0200, Christoph Berg wrote:
> Re: To Tomas Vondra
> > Why do we try to force the pages to be allocated at all? This is just
> > a monitoring function, it should not change the actual system state.
The problem is that the kernel function just gives bogus results for pages
that *are* present in memory but that have only touched in another process
that has mapped the same range of memory.
> One-time touching might also not be enough, what if the pages later
> get swapped out and the monitoring functions are called again?
I don't think that's a problem, the process still has a relevant page table
entry in that case.
Greetings,
Andres Freund