/*
* need an interface for the VM to add new memory regions,
* but without onlining it.
*/
int register_new_memory(int nid, struct mem_section *section)
{
int ret = 0;
struct memory_block *mem;
if (is_zone_device_section(section))
return 0;
mutex_lock(&mem_sysfs_mutex);
mem = find_memory_block(section);
if (mem) {
mem->section_count++;
put_device(&mem->dev);
} else {
ret = init_memory_block(&mem, section, MEM_OFFLINE);
if (ret)
goto out;
mem->section_count++;
}
if (mem->section_count == sections_per_block)
ret = register_mem_sect_under_node(mem, nid);
out:
mutex_unlock(&mem_sysfs_mutex);
return ret;
}
int main()
{
init_memory_block();
int choice ;
while(1)
{
choice = take_user_input();
if (5 == choice)
{
break;
}
execute_choice(choice);
}
return 0;
}
static int add_memory_section(int nid, struct mem_section *section,
struct memory_block **mem_p,
unsigned long state, enum mem_add_context context)
{
struct memory_block *mem = NULL;
int scn_nr = __section_nr(section);
int ret = 0;
mutex_lock(&mem_sysfs_mutex);
if (context == BOOT) {
/* same memory block ? */
if (mem_p && *mem_p)
if (scn_nr >= (*mem_p)->start_section_nr &&
scn_nr <= (*mem_p)->end_section_nr) {
mem = *mem_p;
kobject_get(&mem->dev.kobj);
}
} else
mem = find_memory_block(section);
if (mem) {
mem->section_count++;
kobject_put(&mem->dev.kobj);
} else {
ret = init_memory_block(&mem, section, state);
/* store memory_block pointer for next loop */
if (!ret && context == BOOT)
if (mem_p)
*mem_p = mem;
}
if (!ret) {
if (context == HOTPLUG &&
mem->section_count == sections_per_block)
ret = register_mem_sect_under_node(mem, nid);
}
mutex_unlock(&mem_sysfs_mutex);
return ret;
}
static int add_memory_block(int base_section_nr)
{
struct memory_block *mem;
int i, ret, section_count = 0, section_nr;
for (i = base_section_nr;
(i < base_section_nr + sections_per_block) && i < NR_MEM_SECTIONS;
i++) {
if (!present_section_nr(i))
continue;
if (section_count == 0)
section_nr = i;
section_count++;
}
if (section_count == 0)
return 0;
ret = init_memory_block(&mem, __nr_to_section(section_nr), MEM_ONLINE);
if (ret)
return ret;
mem->section_count = section_count;
return 0;
}
static int add_memory_section(int nid, struct mem_section *section,
unsigned long state, enum mem_add_context context)
{
struct memory_block *mem;
int ret = 0;
mutex_lock(&mem_sysfs_mutex);
mem = find_memory_block(section);
if (mem) {
mem->section_count++;
kobject_put(&mem->dev.kobj);
} else
ret = init_memory_block(&mem, section, state);
if (!ret) {
if (context == HOTPLUG &&
mem->section_count == sections_per_block)
ret = register_mem_sect_under_node(mem, nid);
}
mutex_unlock(&mem_sysfs_mutex);
return ret;
}
