unevictable lru: add event counting with statistics

[linux-2.6-omap-h63xx.git] / mm / memory_hotplug.c

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 89fee2dcb03928594ca2da67e9b75e7c8507394b..3b4975815141f3f198926176d35c60a6fc282635 100644 (file)
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -26,6 +26,7 @@
 #include <linux/delay.h>
 #include <linux/migrate.h>
 #include <linux/page-isolation.h>
+#include <linux/pfn.h>
 
 #include <asm/tlbflush.h>
 
@@ -657,8 +658,9 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
                 * We can skip free pages. And we can only deal with pages on
                 * LRU.
                 */
-               ret = isolate_lru_page(page, &source);
+               ret = isolate_lru_page(page);
                if (!ret) { /* Success */
+                       list_add_tail(&page->lru, &source);
                        move_pages--;
                } else {
                        /* Becasue we don't have big zone->lock. we should
@@ -849,10 +851,19 @@ failed_removal:
 
        return ret;
 }
+
+int remove_memory(u64 start, u64 size)
+{
+       unsigned long start_pfn, end_pfn;
+
+       start_pfn = PFN_DOWN(start);
+       end_pfn = start_pfn + PFN_DOWN(size);
+       return offline_pages(start_pfn, end_pfn, 120 * HZ);
+}
 #else
 int remove_memory(u64 start, u64 size)
 {
        return -EINVAL;
 }
-EXPORT_SYMBOL_GPL(remove_memory);
 #endif /* CONFIG_MEMORY_HOTREMOVE */
+EXPORT_SYMBOL_GPL(remove_memory);