pmap_growkernel(9) [freebsd man page]

PMAP_GROWKERNEL(9)					   BSD Kernel Developer's Manual					PMAP_GROWKERNEL(9)

NAME

     pmap_growkernel -- grow the kernel virtual address (KVA) space

SYNOPSIS

     #include <sys/param.h>
     #include <vm/vm.h>
     #include <vm/pmap.h>

     void
     pmap_growkernel(vm_offset_t addr);

DESCRIPTION

     The pmap_growkernel() function grows the kernel virtual address space to the virtual address addr.

     It will allocate more page entries if required.

SEE ALSO

     pmap(9)

AUTHORS

     This manual page was written by Bruce M Simpson <bms@spc.org>.

BSD
								   July 21, 2003							       BSD

VM_MAP_FINDSPACE(9)					   BSD Kernel Developer's Manual				       VM_MAP_FINDSPACE(9)

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; oth-
     erwise, 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>.

BSD
								   July 19, 2003							       BSD