Struct SpaceReferenceMapping 

pub struct SpaceReferenceMapping {
    pub depth: usize,
    pub space: SpaceId,
    pub our_va: u64,
    pub their_va: u64,
}

A reference from one address space to an intermediate page table that lives in a different space. Produced by walk_va_spaces when the walker encounters an intermediate table (at some depth below the root) whose physical address was already seen via an earlier root — i.e. the two spaces alias that sub-tree.

Semantics: the level-depth block in our space that contains VAs starting at our_va is aliased to the level-depth block in space that contains VAs starting at their_va. Everything below that sub-tree — PDEs, PTEs, leaf mappings — is shared wholesale.

depth is counted from the root:

• depth = 1 on i686: the shared thing is a leaf PT (the thing a PDE points to).
• depth = 1, 2, 3 on amd64: PDPT, PD, or PT respectively.

Fields

depth: usize

Depth from the root at which the alias starts (1-based).

space: SpaceId

The “owning” space — the first root that visited this intermediate PA during walk_va_spaces.

our_va: u64

Start VA of the aliased sub-tree in OUR space.

their_va: u64

Start VA of the aliased sub-tree in the owning space. Usually equal to our_va (kernel mappings at the same VA across processes) but the design permits different VAs.

Trait Implementations

impl Clone for SpaceReferenceMapping

fn clone(&self) -> SpaceReferenceMapping

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SpaceReferenceMapping

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

Formats the value using the given formatter.

impl Copy for SpaceReferenceMapping