--- linux-2.6.18/include/linux/fs.h	2006-09-19 23:42:06.000000000 -0400
+++ ups-kernel/include/linux/fs.h	2006-11-30 02:16:34.000000000 -0500
@@ -1625,7 +1625,8 @@ extern void remove_inode_hash(struct ino
 static inline void insert_inode_hash(struct inode *inode) {
 	__insert_inode_hash(inode, inode->i_ino);
 }
-
+extern void void drop_pagecache_sb(struct super_block *sb, int nr_goal);:q
+ 
 extern struct file * get_empty_filp(void);
 extern void file_move(struct file *f, struct list_head *list);
 extern void file_kill(struct file *f);
--- linux-2.6.18/fs/drop_caches.c	2006-09-19 23:42:06.000000000 -0400
+++ ups-kernel/fs/drop_caches.c	2006-11-30 03:36:11.000000000 -0500
@@ -12,13 +12,20 @@
 /* A global variable is a bit ugly, but it keeps the code simple */
 int sysctl_drop_caches;
 
-static void drop_pagecache_sb(struct super_block *sb)
+void drop_pagecache_sb(struct super_block *sb, int nr_goal)
 {
 	struct inode *inode;
+	int nr_count=0;
 
 	spin_lock(&inode_lock);
 	list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
-		if (inode->i_state & (I_FREEING|I_WILL_FREE))
+		if (nr_goal) {
+			if (nr_goal == nr_count)
+				break;
+			if ((inode->i_state || atomic_read(&inode->i_count))
+				continue;
+			nr_count++;
+		} else if (inode->i_state & (I_FREEING|I_WILL_FREE))
 			continue;
 		invalidate_inode_pages(inode->i_mapping);
 	}
@@ -36,7 +43,7 @@ restart:
 		spin_unlock(&sb_lock);
 		down_read(&sb->s_umount);
 		if (sb->s_root)
-			drop_pagecache_sb(sb);
+			drop_pagecache_sb(sb, 0);
 		up_read(&sb->s_umount);
 		spin_lock(&sb_lock);
 		if (__put_super_and_need_restart(sb))
@@ -66,3 +73,6 @@ int drop_caches_sysctl_handler(ctl_table
 	}
 	return 0;
 }
+
+EXPORT_SYMBOL(drop_pagecache_sb);
+