From 31b55bb28847f0b8de9f1d58e93870aa107f8db4 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 17 Apr 2008 17:40:45 +0200
Subject: [PATCH] --- yaml --- r: 88575 b: refs/heads/master c:
 ee7ae7a1981caaa4a5b14d8c75692a9dccd52105 h: refs/heads/master i:   88573:
 7f85cd30d84ac498ff815d822544f776f73aa677   88571:
 367887d92cacf11b6cbe3a3a0930fa7e5e33d17c   88567:
 84d04bc97647b6db60ef9b01103f5ad4be247fce   88559:
 2e706609eca52765a61c4062f57b7ae435bc95cb   88543:
 0294ea83be95baa24bf29abdfd9bec4bfb963464   88511:
 8d5ba7bb26e4517cd81e1ba3b617572e28d9ee4f   88447:
 f355d6b515e772228819beb46d00a8432ea640b6   88319:
 58c8bd05603de64c864dbbbb64502b80d5290f26   88063:
 6c3bac09bdab7d7df7970dac181ffd519b6b0c38 v: v3

---
 [refs]                       |  2 +-
 trunk/arch/x86/mm/pageattr.c | 41 ++++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index f56331dd5f20..1c137ef4cf4b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5de253cc5b1f565f7aeb5bacd67bac37e943ceef
+refs/heads/master: ee7ae7a1981caaa4a5b14d8c75692a9dccd52105
diff --git a/trunk/arch/x86/mm/pageattr.c b/trunk/arch/x86/mm/pageattr.c
index 7b79f6be4e7d..6cdfc0fd68be 100644
--- a/trunk/arch/x86/mm/pageattr.c
+++ b/trunk/arch/x86/mm/pageattr.c
@@ -9,6 +9,8 @@
 #include <linux/slab.h>
 #include <linux/mm.h>
 #include <linux/interrupt.h>
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
 
 #include <asm/e820.h>
 #include <asm/processor.h>
@@ -918,6 +920,45 @@ void kernel_map_pages(struct page *page, int numpages, int enable)
 	cpa_fill_pool(NULL);
 }
 
+#ifdef CONFIG_DEBUG_FS
+static int dpa_show(struct seq_file *m, void *v)
+{
+	seq_puts(m, "DEBUG_PAGEALLOC\n");
+	seq_printf(m, "pool_size     : %lu\n", pool_size);
+	seq_printf(m, "pool_pages    : %lu\n", pool_pages);
+	seq_printf(m, "pool_low      : %lu\n", pool_low);
+	seq_printf(m, "pool_used     : %lu\n", pool_used);
+	seq_printf(m, "pool_failed   : %lu\n", pool_failed);
+
+	return 0;
+}
+
+static int dpa_open(struct inode *inode, struct file *filp)
+{
+	return single_open(filp, dpa_show, NULL);
+}
+
+static const struct file_operations dpa_fops = {
+	.open		= dpa_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+int __init debug_pagealloc_proc_init(void)
+{
+	struct dentry *de;
+
+	de = debugfs_create_file("debug_pagealloc", 0600, NULL, NULL,
+				 &dpa_fops);
+	if (!de)
+		return -ENOMEM;
+
+	return 0;
+}
+__initcall(debug_pagealloc_proc_init);
+#endif
+
 #ifdef CONFIG_HIBERNATION
 
 bool kernel_page_present(struct page *page)