Struct PageGeometry 

pub struct PageGeometry {
    pub host_page: u64,
    pub hvf_stage2_granule: u64,
    pub tracking_page_default: u64,
    pub tracking_page_hot: u64,
}

Page geometry constants — three sizes that must never be conflated.

On Apple Silicon the host page is 16 KiB, the HVF stage-2 granule is 16 KiB, and the dirty-tracking page defaults to 2 MiB with adaptive step-down to 16 KiB for hot regions. See 99-key-decisions.md § D21.

Fields

host_page: u64

Apple Silicon host page (16 KiB) — vm_page_size returns this.

hvf_stage2_granule: u64

HVF stage-2 translation granule (16 KiB on Apple Silicon).

tracking_page_default: u64

Default tracking-page granularity for dirty-page bitmaps (2 MiB).

tracking_page_hot: u64

Step-down tracking page used by the adaptive heuristic for hot regions (16 KiB).

Implementations

impl PageGeometry

pub const APPLE_SILICON: Self

The Apple-Silicon page geometry. macOS 15+ on M-series.

Trait Implementations

impl Clone for PageGeometry

fn clone(&self) -> PageGeometry

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PageGeometry

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Copy for PageGeometry