#include <linux/compiler.h>
#include <linux/module.h>
#include <linux/pagevec.h>
+#include <linux/writeback.h>
#include <linux/slab.h>
#include <linux/sysctl.h>
#include <linux/cpu.h>
#include <linux/highmem.h>
#include <linux/vmalloc.h>
#include <linux/ioport.h>
+#include <linux/cpuset.h>
#include <asm/tlbflush.h>
-extern void zonetable_add(struct zone *zone, int nid, int zid, unsigned long pfn,
- unsigned long size);
+/* add this memory to iomem resource */
+static struct resource *register_memory_resource(u64 start, u64 size)
+{
+ struct resource *res;
+ res = kzalloc(sizeof(struct resource), GFP_KERNEL);
+ BUG_ON(!res);
+
+ res->name = "System RAM";
+ res->start = start;
+ res->end = start + size - 1;
+ res->flags = IORESOURCE_MEM;
+ if (request_resource(&iomem_resource, res) < 0) {
+ printk("System RAM resource %llx - %llx cannot be added\n",
+ (unsigned long long)res->start, (unsigned long long)res->end);
+ kfree(res);
+ res = NULL;
+ }
+ return res;
+}
+
+static void release_memory_resource(struct resource *res)
+{
+ if (!res)
+ return;
+ release_resource(res);
+ kfree(res);
+ return;
+}
+
+
+#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
static int __add_zone(struct zone *zone, unsigned long phys_start_pfn)
{
struct pglist_data *pgdat = zone->zone_pgdat;
return 0;
}
-extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn,
- int nr_pages);
static int __add_section(struct zone *zone, unsigned long phys_start_pfn)
{
int nr_pages = PAGES_PER_SECTION;
int ret;
+ if (pfn_valid(phys_start_pfn))
+ return -EEXIST;
+
ret = sparse_add_one_section(zone, phys_start_pfn, nr_pages);
if (ret < 0)
res.flags = IORESOURCE_MEM; /* we just need system ram */
section_end = res.end;
- while (find_next_system_ram(&res) >= 0) {
+ while ((res.start < res.end) && (find_next_system_ram(&res) >= 0)) {
start_pfn = (unsigned long)(res.start >> PAGE_SHIFT);
nr_pages = (unsigned long)
((res.end + 1 - res.start) >> PAGE_SHIFT);
if (need_zonelists_rebuild)
build_all_zonelists();
vm_total_pages = nr_free_pagecache_pages();
+ writeback_set_ratelimit();
return 0;
}
+#endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */
static pg_data_t *hotadd_new_pgdat(int nid, u64 start)
{
return;
}
-/* add this memory to iomem resource */
-static int register_memory_resource(u64 start, u64 size)
-{
- struct resource *res;
- int ret = 0;
- res = kzalloc(sizeof(struct resource), GFP_KERNEL);
- BUG_ON(!res);
-
- res->name = "System RAM";
- res->start = start;
- res->end = start + size - 1;
- res->flags = IORESOURCE_MEM;
- if (request_resource(&iomem_resource, res) < 0) {
- printk("System RAM resource %llx - %llx cannot be added\n",
- (unsigned long long)res->start, (unsigned long long)res->end);
- kfree(res);
- ret = -EEXIST;
- }
- return ret;
-}
-
-
int add_memory(int nid, u64 start, u64 size)
{
pg_data_t *pgdat = NULL;
int new_pgdat = 0;
+ struct resource *res;
int ret;
+ res = register_memory_resource(start, size);
+ if (!res)
+ return -EEXIST;
+
if (!node_online(nid)) {
pgdat = hotadd_new_pgdat(nid, start);
if (!pgdat)
/* we online node here. we can't roll back from here. */
node_set_online(nid);
+ cpuset_track_online_nodes();
+
if (new_pgdat) {
ret = register_one_node(nid);
/*
BUG_ON(ret);
}
- /* register this memory as resource */
- ret = register_memory_resource(start, size);
-
return ret;
error:
/* rollback pgdat allocation and others */
if (new_pgdat)
rollback_node_hotadd(nid, pgdat);
+ if (res)
+ release_memory_resource(res);
return ret;
}