Struct Vmalloc 

struct Vmalloc {
    initialized: bool,
    subtree_ready: bool,
    arena_initialized: bool,
    bootstrap_frame: Option<PhysFrame>,
    free_head: *mut VmallocNode,
    alloc_head: *mut VmallocNode,
    node_pool_free: *mut VmallocNode,
    alloc_count: usize,
    allocated_pages: usize,
    metadata_pages: usize,
    fail_count: usize,
    last_failure: Option<VmallocFailureSnapshot>,
}

Fields

initialized: bool

subtree_ready: bool

arena_initialized: bool

True once the initial single-spanning free extent has been inserted. Replaces the ambiguous !free_head.is_null() || !alloc_head.is_null() guard that read as a free-space check rather than an init-state check.

bootstrap_frame: Option<PhysFrame>

Bootstrap frame permanently mapped at VMALLOC_VIRT_START (arena page 0).

Keeping this mapping live anchors the intermediate page-table nodes (PDPT → PD → PT) so they are present in the canonical kernel L4 table and inherited by every address space created after init(). The frame must never be freed while the kernel is running.

free_head: *mut VmallocNode

alloc_head: *mut VmallocNode

node_pool_free: *mut VmallocNode

alloc_count: usize

allocated_pages: usize

metadata_pages: usize

fail_count: usize

last_failure: Option<VmallocFailureSnapshot>

Implementations

impl Vmalloc

const fn new() -> Self

fn record_failure( &mut self, size: usize, pages: usize, error: VmallocError, ) -> VmallocError

unsafe fn refill_node_pool( &mut self, token: &IrqDisabledToken, ) -> Result<(), VmallocError>

unsafe fn alloc_node( &mut self, token: &IrqDisabledToken, ) -> Result<*mut VmallocNode, VmallocError>

unsafe fn release_node(&mut self, node: *mut VmallocNode)

unsafe fn ensure_arena_ready( &mut self, token: &IrqDisabledToken, ) -> Result<(), VmallocError>

unsafe fn reserve_range( &mut self, pages: usize, token: &IrqDisabledToken, ) -> Result<*mut VmallocNode, VmallocError>

unsafe fn insert_alloc_node(&mut self, node: *mut VmallocNode)

unsafe fn take_alloc_node_by_addr(&mut self, addr: u64) -> *mut VmallocNode

unsafe fn insert_free_node_merge(&mut self, node: *mut VmallocNode)

unsafe fn free_extent_count(&self) -> usize

unsafe fn largest_free_extent_pages(&self) -> usize

unsafe fn node_pool_free_count(&self) -> usize

Trait Implementations

impl Send for Vmalloc