NAME
vm_map_findspace —
find a free region within a
map
SYNOPSIS
#include
<sys/param.h>
#include <vm/vm.h>
#include <vm/vm_map.h>
int
vm_map_findspace(vm_map_t map,
vm_offset_t start, vm_size_t
length, vm_offset_t *addr);
DESCRIPTION
Thevm_map_findspace()
function attempts to find a region with sufficient space in the
map for an object of size length
at the address addr.
IMPLEMENTATION NOTES
It is the caller's responsibility to obtain a lock on the map using vm_map_lock(9) before calling this function.
This routine may call pmap_growkernel(9) to grow the kernel's address space, if and only if the mapping is being made within the kernel address space, and if insufficient space remains in the kernel_map.
RETURN VALUES
The vm_map_findspace() function returns
the value 0 if successful, and *addr will contain the
first virtual address in the found region; otherwise, the value 1 is
returned.
SEE ALSO
pmap_growkernel(9), vm_map(9), vm_map_entry_resize_free(9), vm_map_lock(9)
AUTHORS
This manual page was written by Bruce M Simpson <bms@spc.org>.