sh: convert /proc/cpu/aligmnent, /proc/cpu/kernel_alignment to seq_file
[safe/jmp/linux-2.6] / mm / memory_hotplug.c
index e4412a6..2047465 100644 (file)
@@ -26,6 +26,7 @@
 #include <linux/migrate.h>
 #include <linux/page-isolation.h>
 #include <linux/pfn.h>
+#include <linux/suspend.h>
 
 #include <asm/tlbflush.h>
 
@@ -339,8 +340,11 @@ EXPORT_SYMBOL_GPL(__remove_pages);
 
 void online_page(struct page *page)
 {
+       unsigned long pfn = page_to_pfn(page);
+
        totalram_pages++;
-       num_physpages++;
+       if (pfn >= num_physpages)
+               num_physpages = pfn + 1;
 
 #ifdef CONFIG_HIGHMEM
        if (PageHighMem(page))
@@ -410,7 +414,7 @@ int online_pages(unsigned long pfn, unsigned long nr_pages)
        if (!populated_zone(zone))
                need_zonelists_rebuild = 1;
 
-       ret = walk_memory_resource(pfn, nr_pages, &onlined_pages,
+       ret = walk_system_ram_range(pfn, nr_pages, &onlined_pages,
                online_pages_range);
        if (ret) {
                printk(KERN_DEBUG "online_pages %lx at %lx failed\n",
@@ -422,6 +426,7 @@ int online_pages(unsigned long pfn, unsigned long nr_pages)
        zone->present_pages += onlined_pages;
        zone->zone_pgdat->node_present_pages += onlined_pages;
 
+       zone_pcp_update(zone);
        setup_per_zone_wmarks();
        calculate_zone_inactive_ratio(zone);
        if (onlined_pages) {
@@ -443,7 +448,8 @@ int online_pages(unsigned long pfn, unsigned long nr_pages)
 }
 #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */
 
-static pg_data_t *hotadd_new_pgdat(int nid, u64 start)
+/* we are OK calling __meminit stuff here - we have CONFIG_MEMORY_HOTPLUG */
+static pg_data_t __ref *hotadd_new_pgdat(int nid, u64 start)
 {
        struct pglist_data *pgdat;
        unsigned long zones_size[MAX_NR_ZONES] = {0};
@@ -480,14 +486,18 @@ int __ref add_memory(int nid, u64 start, u64 size)
        struct resource *res;
        int ret;
 
+       lock_system_sleep();
+
        res = register_memory_resource(start, size);
+       ret = -EEXIST;
        if (!res)
-               return -EEXIST;
+               goto out;
 
        if (!node_online(nid)) {
                pgdat = hotadd_new_pgdat(nid, start);
+               ret = -ENOMEM;
                if (!pgdat)
-                       return -ENOMEM;
+                       goto out;
                new_pgdat = 1;
        }
 
@@ -510,7 +520,8 @@ int __ref add_memory(int nid, u64 start, u64 size)
                BUG_ON(ret);
        }
 
-       return ret;
+       goto out;
+
 error:
        /* rollback pgdat allocation and others */
        if (new_pgdat)
@@ -518,6 +529,8 @@ error:
        if (res)
                release_memory_resource(res);
 
+out:
+       unlock_system_sleep();
        return ret;
 }
 EXPORT_SYMBOL_GPL(add_memory);
@@ -701,7 +714,7 @@ offline_isolated_pages_cb(unsigned long start, unsigned long nr_pages,
 static void
 offline_isolated_pages(unsigned long start_pfn, unsigned long end_pfn)
 {
-       walk_memory_resource(start_pfn, end_pfn - start_pfn, NULL,
+       walk_system_ram_range(start_pfn, end_pfn - start_pfn, NULL,
                                offline_isolated_pages_cb);
 }
 
@@ -727,7 +740,7 @@ check_pages_isolated(unsigned long start_pfn, unsigned long end_pfn)
        long offlined = 0;
        int ret;
 
-       ret = walk_memory_resource(start_pfn, end_pfn - start_pfn, &offlined,
+       ret = walk_system_ram_range(start_pfn, end_pfn - start_pfn, &offlined,
                        check_pages_isolated_cb);
        if (ret < 0)
                offlined = (long)ret;
@@ -754,6 +767,8 @@ int offline_pages(unsigned long start_pfn,
        if (!test_pages_in_a_zone(start_pfn, end_pfn))
                return -EINVAL;
 
+       lock_system_sleep();
+
        zone = page_zone(pfn_to_page(start_pfn));
        node = zone_to_nid(zone);
        nr_pages = end_pfn - start_pfn;
@@ -761,7 +776,7 @@ int offline_pages(unsigned long start_pfn,
        /* set above range as isolated */
        ret = start_isolate_page_range(start_pfn, end_pfn);
        if (ret)
-               return ret;
+               goto out;
 
        arg.start_pfn = start_pfn;
        arg.nr_pages = nr_pages;
@@ -831,7 +846,6 @@ repeat:
        zone->present_pages -= offlined_pages;
        zone->zone_pgdat->node_present_pages -= offlined_pages;
        totalram_pages -= offlined_pages;
-       num_physpages -= offlined_pages;
 
        setup_per_zone_wmarks();
        calculate_zone_inactive_ratio(zone);
@@ -840,6 +854,7 @@ repeat:
        writeback_set_ratelimit();
 
        memory_notify(MEM_OFFLINE, &arg);
+       unlock_system_sleep();
        return 0;
 
 failed_removal:
@@ -849,6 +864,8 @@ failed_removal:
        /* pushback to free area */
        undo_isolate_page_range(start_pfn, end_pfn);
 
+out:
+       unlock_system_sleep();
        return ret;
 }