If that is the case, does it actually matter what CPU core pv runs on? I feel like _something_ must ultimately zero the page out before it can get re-mapped to

If that is the case, does it actually matter what CPU core pv runs on? I feel like _something_ must ultimately zero the page out before it can get re-mapped to the process, but I'm not sure which core that happens on, or whether there's some other hardware mechanism that allows the OS to zero a page without actually utilizing memory bandwidth.