From efc061e453575f1a8d3189e858b8a2d4a39d2310 Mon Sep 17 00:00:00 2001
From: "kaf24@firebug.cl.cam.ac.uk" <kaf24@firebug.cl.cam.ac.uk>
Date: Tue, 28 Feb 2006 11:07:18 +0100
Subject: [PATCH] Add 'm' debug key to print free-memory info.

Signed-off-by: Keir Fraser <keir@xensource.com>
---
 xen/common/page_alloc.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c
index 199818fe65..f594a7fe40 100644
--- a/xen/common/page_alloc.c
+++ b/xen/common/page_alloc.c
@@ -32,6 +32,7 @@
 #include <xen/softirq.h>
 #include <xen/shadow.h>
 #include <xen/domain_page.h>
+#include <xen/keyhandler.h>
 #include <asm/page.h>
 
 /*
@@ -662,6 +663,26 @@ unsigned long avail_domheap_pages(void)
 }
 
 
+static void pagealloc_keyhandler(unsigned char key)
+{
+    printk("Physical memory information:\n");
+    printk("    Xen heap: %lukB free\n"
+           "    DMA heap: %lukB free\n"
+           "    Dom heap: %lukB free\n",
+           avail[MEMZONE_XEN]<<(PAGE_SHIFT-10),
+           avail[MEMZONE_DMADOM]<<(PAGE_SHIFT-10),
+           avail[MEMZONE_DOM]<<(PAGE_SHIFT-10));
+}
+
+
+static __init int pagealloc_keyhandler_init(void)
+{
+    register_keyhandler('m', pagealloc_keyhandler, "memory info");
+    return 0;
+}
+__initcall(pagealloc_keyhandler_init);
+
+
 
 /*************************
  * PAGE SCRUBBING
-- 
2.30.2