Enum Migratetype 

#[repr(u8)]
pub enum Migratetype {
    Unmovable = 0,
    Movable = 1,
}

Minimal free-block classes used by the buddy allocator.

This is intentionally smaller than Linux’s full migratetype/pageblock matrix. The current design separates long-lived kernel pages from more reclaimable or relocatable user pages without introducing full migration machinery yet.

Variants

Unmovable = 0

Default class for kernel data, page tables and other pinned pages.

Movable = 1

Preferred class for user-space data and frames that can later be moved.

Implementations

impl Migratetype

pub const COUNT: usize = 2

Number of migratetypes tracked by the allocator.

pub const ALL: [Self; 2]

Stable iteration order used by diagnostics.

pub const fn index(self) -> usize

Returns the free-list index for this migratetype.

pub const fn fallback_order(self) -> [Self; 2]

Returns the donor probing order for an allocation request.

Trait Implementations

impl Clone for Migratetype

fn clone(&self) -> Migratetype

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Migratetype

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

Formats the value using the given formatter.

impl PartialEq for Migratetype

fn eq(&self, other: &Migratetype) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Migratetype

impl Eq for Migratetype

impl StructuralPartialEq for Migratetype