VMEM_ADD(9F) Kernel Functions for Drivers VMEM_ADD(9F)

NAME

vmem_add - add spans to a vmem arena

SYNOPSIS

#include <sys/vmem.h>

void *
vmem_add(vmem_t *vmp, void *vaddr, size_t size, int vmflag);

INTERFACE LEVEL

illumos DDI specific

PARAMETERS

vmp The vmem arena to which the span should be added.

vaddr The base address of the span to add.

size The size of the span to add.

vmflag Flags affecting the allocation of the span to add.

DESCRIPTION

The vmem_add() function adds size bytes starting at vaddr to a vmem
arena from which future calls to vmem_alloc() may allocate.

VM_SLEEP or VM_NOSLEEP must be specified in vmflag, and indicate
whether the addition may block.

CONTEXT

This function can be called from either user or kernel context. If the
VM_NOSLEEP flag is specified, it may also be called from interrupt
context.

RETURN VALUES

Upon success vmem_add() returns vaddr. On failure, NULL is returned.

SEE ALSO

vmem(9), vmem_alloc(9F), vmem_create(9F)

illumos January 18, 2017 illumos