Technical Reference: Kernel and Subsystems, Volume 1

kvmgetinfo Kernel Service

Retrieves Virtual Memory Manager (VMM) information.

#include <sys/vminfo.h>

int kvmgetinfo ( void *out, int command, int arg)

The kvmgetinfo kernel service returns the current value of certain VMM parameters.

out

Specifies the address where VMM information should be returned.

command

Specifies which information should be returned. The valid values for the command parameter are decribed below:

VMINFO: The content of vmminfo structure (described in sys/vminfo.h) will be returned. The out parameter should point to a vminfo structure and the arg parameter should be the size of this structure. The smaller of the arg or sizeof (vminfo structure) parameters will be copied.
VM_PAGE_INFO: The size, in bytes, of the page backing the address specified in the addr field of the vm_page_info structure (described in the sys/vminfo.h file) is returned. The out parameter should point to a vm_page_info structure with the addr field set to the desired address of which to query the page size. This address, addr, is interpreted as an address in the address space of the current running process. The arg parameter should be the size of the vm_page_info structure.
IPC_LIMITS: The content of the ipc_limits struct (described in the sys/vminfo.h file) is returned. The out parameter should point to an ipc_limits structure and arg should be the size of this structure. The smaller of the arg or sizeof (struct ipc_limits) parameters will be copied. The ipc_limits struct contains the inter-process communication (IPC) limits for the system.

arg

An additional parameter which will depend upon the command parameter.

The kvmgetinfo kernel service can be called from the process environment only.

0	Indicates successful completion.
ENOSYS	Indicates the command parameter is not valid (or not yet implemented).
EINVAL	When VM_PAGE_INFO is the command, the adr field of the vm_page_info structure is an invalid address.

Memory Kernel Services and Understanding Virtual Memory Manager Interfaces in AIX 5L Version 5.2 Kernel Extensions and Device Support Programming Concepts.