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Add a list of reservations to the vm object structure.

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Recycle the vm object's "pg_color" field to represent the color of the
first virtual page address at which the object is mapped instead of the
color of the object's first physical page.  Since an object may not be
mapped, introduce a flag "OBJ_COLORED" that indicates whether "pg_color"
is valid.
This commit is contained in:
Alan Cox 2007-12-27 17:56:35 +00:00
parent ae0fee95e1
commit 3df92083af
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=174940
1 changed files with 2 additions and 0 deletions
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sys/vm/vm_object.h
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@ -100,6 +100,7 @@ struct vm_object {
struct vm_object *backing_object; /* object that I'm a shadow of */
vm_ooffset_t backing_object_offset;/* Offset in backing object */
TAILQ_ENTRY(vm_object) pager_object_list; /* list of all objects of this pager type */
LIST_HEAD(, vm_reserv) rvq; /* list of reservations */
vm_page_t cache; /* root of the cache page splay tree */
void *handle;
union {
@ -143,6 +144,7 @@ struct vm_object {
#define OBJ_PIPWNT 0x0040 /* paging in progress wanted */
#define OBJ_MIGHTBEDIRTY 0x0100 /* object might be dirty */
#define OBJ_CLEANING 0x0200
#define OBJ_COLORED 0x1000 /* pg_color is defined */
#define OBJ_ONEMAPPING 0x2000 /* One USE (a single, non-forked) mapping flag */
#define OBJ_DISCONNECTWNT 0x4000 /* disconnect from vnode wanted */
#define OBJ_NEEDGIANT 0x8000 /* object requires Giant */