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

       The  vm_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>.

Debian                                            July 19, 2003                              VM_MAP_FINDSPACE(9)