diff options
Diffstat (limited to 'vm/vm_map.h')
| -rw-r--r-- | vm/vm_map.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/vm/vm_map.h b/vm/vm_map.h index 381c7cfd..d5bcf96b 100644 --- a/vm/vm_map.h +++ b/vm/vm_map.h @@ -51,6 +51,7 @@ #include <vm/vm_page.h> #include <vm/vm_types.h> #include <kern/lock.h> +#include <kern/rbtree.h> #include <kern/macro_help.h> #define KENTRY_DATA_SIZE (32*PAGE_SIZE) @@ -102,6 +103,7 @@ struct vm_map_entry { #define vme_next links.next #define vme_start links.start #define vme_end links.end + struct rbtree_node tree_node; /* links to other entries in tree */ union vm_map_object object; /* object I point to */ vm_offset_t offset; /* offset into object */ unsigned int @@ -137,6 +139,7 @@ typedef struct vm_map_entry *vm_map_entry_t; */ struct vm_map_header { struct vm_map_links links; /* first, last, min, max */ + struct rbtree tree; /* Sorted tree of entries */ int nentries; /* Number of entries */ boolean_t entries_pageable; /* are map entries pageable? */ @@ -152,9 +155,11 @@ struct vm_map_header { * * Implementation: * Maps are doubly-linked lists of map entries, sorted - * by address. One hint is used to start - * searches again from the last successful search, - * insertion, or removal. Another hint is used to + * by address. They're also contained in a red-black tree. + * One hint is used to start searches again at the last + * successful search, insertion, or removal. If the hint + * lookup failed (i.e. the hint didn't refer to the requested + * entry), a BST lookup is performed. Another hint is used to * quickly find free space. */ struct vm_map { |