push_node_boundaries(9)
NAME
push_node_boundaries - Push node boundaries to at least the requested
boundary
SYNOPSIS
void __init push_node_boundaries(unsigned int nid,
unsigned long start_pfn,
unsigned long end_pfn);
ARGUMENTS
- nid
- The nid of the node to push the boundary for
- start_pfn
- The start pfn of the node
- end_pfn
- The end pfn of the node
DESCRIPTION
In reserve-based hot-add, mem_map is allocated that is unused until
hotadd time. Specifically, on x86_64, SRAT will report ranges that can
potentially be hotplugged even though no physical memory exists. This
function allows an arch to push out the node boundaries so mem_map is
allocated that can be used later.