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Reverse map

include/mem/rmap.h View source View on GitHub

The way that rmap goes is:

page -> folio -> mapping object (file_vma, anon_vma) -> traverse interval tree -> for each matching avc -> vma_range -> addr

Type Aliases

Section titled “Type Aliases”

rmap_visit_fn

Section titled “rmap_visit_fn”
typedef void (*rmap_visit_fn)(
    struct mm * mm,
    vaddr_t va,
    struct folio * f,
    void * private
)
source

visitor invoked for each confirmed (mm, va) mapping the folio

Functions

Section titled “Functions”

rmap_walk_anon

Section titled “rmap_walk_anon”
void rmap_walk_anon(
    struct folio *f,
    rmap_visit_fn visit,
    void *private
)
source

folio_add_anon_rmap

Section titled “folio_add_anon_rmap”
void folio_add_anon_rmap(
    struct folio *f,
    struct vma_range *vm_area,
    vaddr_t va
)
source

fault path: first PTE to map this folio

folio_add_anon_rmap_shared

Section titled “folio_add_anon_rmap_shared”
void folio_add_anon_rmap_shared(
    struct folio *f,
    struct vma_range *vm_area
)
source

additional mapper

folio_remove_rmap

Section titled “folio_remove_rmap”
void folio_remove_rmap(struct folio *f, struct vma_range *vm_area)
source

a PTE stops mapping it

folio_add_anon_rmap_new

Section titled “folio_add_anon_rmap_new”
void folio_add_anon_rmap_new(
    struct folio *f,
    struct vma_range *vm_area,
    vaddr_t va
)
source