This patch is from: Egor Martsenyuk <support at coolvds com>

Virtualize /proc/meminfo output.
total mem = vmguarpages.limit,
swap + ram = privvmpages.limit .
usedram = physpages.held

--- linux-2.6.8-openvz-022.076bkp/fs/proc/proc_misc.c	2006-05-02 11:48:11.000000000 +0300
+++ linux-2.6.8-openvz-022.076/fs/proc/proc_misc.c	2006-05-03 15:36:33.000000000 +0300
@@ -54,6 +54,10 @@
 #include <asm/div64.h>
 #include <linux/fairsched.h>
 
+#include <ub/beancounter.h>
+#include <ub/ub_hash.h>
+#include <ub/ub_debug.h>
+
 /*
  * Warning: stuff below (imported functions) assumes that its output will fit
  * into one page. For some of those functions it may be wrong. Moreover, we
@@ -184,6 +188,20 @@ static int meminfo_read_proc(char *page,
 	unsigned long dummy;
 	struct vmalloc_info vmi;
 
+/*
+ * get open_vz data of mem 
+ * 
+ */
+        struct user_beancounter *ub;
+				
+	
+	ub = current->mm->mm_ub;
+	
+/*
+ * end get open_vz data of mem
+ *
+ */
 	get_page_state(&mi.ps);
 	get_zone_counts(&mi.active, &mi.inactive, &dummy);
 
@@ -211,6 +229,9 @@ static int meminfo_read_proc(char *page,
 	/*
 	 * Tagged format, for easy grepping and expansion.
 	 */
+
+if(ub->ub_uid == 0)
+	{
 	len = sprintf(page,
 		"MemTotal:     %8lu kB\n"
 		"MemFree:      %8lu kB\n"
@@ -257,7 +278,56 @@ static int meminfo_read_proc(char *page,
 		K(mi.vmalloc_used),
 		K(mi.vmalloc_largest)
 		);
-
+	}
+else
+	{
+		len = sprintf(page,
+		"MemTotal:     %8lu kB\n"
+		"MemFree:      %8lu kB\n"
+		"Buffers:      %8lu kB\n"
+		"Cached:       %8lu kB\n"
+		"SwapCached:   %8lu kB\n"
+		"Active:       %8lu kB\n"
+		"Inactive:     %8lu kB\n"
+		"HighTotal:    %8lu kB\n"
+		"HighFree:     %8lu kB\n"
+		"LowTotal:     %8lu kB\n"
+		"LowFree:      %8lu kB\n"
+		"SwapTotal:    %8lu kB\n"
+		"SwapFree:     %8lu kB\n"
+		"Dirty:        %8lu kB\n"
+		"Writeback:    %8lu kB\n"
+		"Mapped:       %8lu kB\n"
+		"Slab:         %8lu kB\n"
+		"Committed_AS: %8lu kB\n"
+		"PageTables:   %8lu kB\n"
+		"VmallocTotal: %8lu kB\n"
+		"VmallocUsed:  %8lu kB\n"
+		"VmallocChunk: %8lu kB\n",
+		ub->ub_parms[7].limit*4,
+		(ub->ub_parms[7].limit - ub->ub_parms[6].held)*4,
+		0,
+		0,
+		0,
+		K(mi.active),
+		K(mi.inactive),
+		K(mi.si.totalhigh),
+		K(mi.si.freehigh),
+		K(mi.si.totalram-mi.si.totalhigh),
+		K(mi.si.freeram-mi.si.freehigh),
+		(ub->ub_parms[2].limit - ub->ub_parms[7].limit)*4,
+		(ub->ub_parms[2].limit - ub->ub_parms[7].limit - ub->ub_parms[2].held)*4,
+		K(mi.ps.nr_dirty),
+		K(mi.ps.nr_writeback),
+		K(mi.ps.nr_mapped),
+		K(mi.ps.nr_slab),
+		K(mi.committed_space),
+		ub->ub_parms[2].held*4,
+		K(mi.vmalloc_total),
+		K(mi.vmalloc_used),
+		K(mi.vmalloc_largest)
+		);
+	}
 #ifdef CONFIG_HUGETLB_PAGE
 #warning Virtualize hugetlb_report_meminfo
 #else