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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, 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.