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VM_PAGE_INSERT(9) | Kernel Developer's Manual | VM_PAGE_INSERT(9) |
NAME¶
vm_page_insert
, vm_page_remove
—
SYNOPSIS¶
#include <sys/param.h>
#include <vm/vm.h>
#include <vm/vm_page.h>
void
vm_page_insert
(vm_page_t
m, vm_object_t
object, vm_pindex_t
pindex);
void
vm_page_remove
(vm_page_t
m);
DESCRIPTION¶
Thevm_page_insert
() function adds a page to the given
object at the given index. The page is added to both the VM page hash table
and to the object's list of pages, but the hardware page tables are not
updated. In the case of a user page, it will be faulted in when it is
accessed. If the page is a kernel page, the caller is expected to handle
adding the page to the kernel's pmap.
If PG_WRITEABLE
is set in the page's
flags, OBJ_WRITEABLE
and
OBJ_MIGHTBEDIRTY
are set in the object's flags.
The vm_page_remove
() function removes the
given page from its object, and from the VM page hash table. The page must
be busy prior to this call, or the system will panic. The pmap entry for the
page is not removed by this function.
The arguments to vm_page_insert
() are:
- m
- The page to add to the object.
- object
- The object the page should be added to.
- pindex
- The index into the object the page should be at.
The arguments to vm_page_remove
() are:
- m
- The page to remove.
IMPLEMENTATION NOTES¶
The index of a page in a VM object is the byte index into the same object truncated to a page boundary. For example, if the page size is 4096 bytes, and the address in the object is 81944, the page index is 20.AUTHORS¶
This manual page was written by Chad David <davidc@acns.ab.ca>.July 17, 2001 | Linux 4.19.0-10-amd64 |