X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fbase%2Fnode.c;h=c80c3aeed004a558de9cf9db0632191cf1c16c99;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=df74785efa5f1644550edf13e90c983b505435c0;hpb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;p=linux-2.6.git

diff --git a/drivers/base/node.c b/drivers/base/node.c
index df74785ef..c80c3aeed 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -10,6 +10,7 @@
 #include <linux/hugetlb.h>
 #include <linux/cpumask.h>
 #include <linux/topology.h>
+#include <linux/nodemask.h>
 
 static struct sysdev_class node_class = {
 	set_kset_name("node"),
@@ -23,7 +24,7 @@ static ssize_t node_read_cpumap(struct sys_device * dev, char * buf)
 	int len;
 
 	/* 2004/06/03: buf currently PAGE_SIZE, need > 1 char per 4 bits. */
-	BUILD_BUG_ON(NR_CPUS/4 > PAGE_SIZE/2);
+	BUILD_BUG_ON(MAX_NUMNODES/4 > PAGE_SIZE/2);
 
 	len = cpumask_scnprintf(buf, PAGE_SIZE-1, mask);
 	len += sprintf(buf + len, "\n");
@@ -38,13 +39,25 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
 	int n;
 	int nid = dev->id;
 	struct sysinfo i;
+	struct page_state ps;
 	unsigned long inactive;
 	unsigned long active;
 	unsigned long free;
 
 	si_meminfo_node(&i, nid);
+	get_page_state_node(&ps, nid);
 	__get_zone_counts(&active, &inactive, &free, NODE_DATA(nid));
 
+	/* Check for negative values in these approximate counters */
+	if ((long)ps.nr_dirty < 0)
+		ps.nr_dirty = 0;
+	if ((long)ps.nr_writeback < 0)
+		ps.nr_writeback = 0;
+	if ((long)ps.nr_mapped < 0)
+		ps.nr_mapped = 0;
+	if ((long)ps.nr_slab < 0)
+		ps.nr_slab = 0;
+
 	n = sprintf(buf, "\n"
 		       "Node %d MemTotal:     %8lu kB\n"
 		       "Node %d MemFree:      %8lu kB\n"
@@ -54,7 +67,11 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
 		       "Node %d HighTotal:    %8lu kB\n"
 		       "Node %d HighFree:     %8lu kB\n"
 		       "Node %d LowTotal:     %8lu kB\n"
-		       "Node %d LowFree:      %8lu kB\n",
+		       "Node %d LowFree:      %8lu kB\n"
+		       "Node %d Dirty:        %8lu kB\n"
+		       "Node %d Writeback:    %8lu kB\n"
+		       "Node %d Mapped:       %8lu kB\n"
+		       "Node %d Slab:         %8lu kB\n",
 		       nid, K(i.totalram),
 		       nid, K(i.freeram),
 		       nid, K(i.totalram - i.freeram),
@@ -63,7 +80,11 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
 		       nid, K(i.totalhigh),
 		       nid, K(i.freehigh),
 		       nid, K(i.totalram - i.totalhigh),
-		       nid, K(i.freeram - i.freehigh));
+		       nid, K(i.freeram - i.freehigh),
+		       nid, K(ps.nr_dirty),
+		       nid, K(ps.nr_writeback),
+		       nid, K(ps.nr_mapped),
+		       nid, K(ps.nr_slab));
 	n += hugetlb_report_node_meminfo(nid, buf + n);
 	return n;
 }
@@ -85,8 +106,8 @@ static ssize_t node_read_numastat(struct sys_device * dev, char * buf)
 	other_node = 0;
 	for (i = 0; i < MAX_NR_ZONES; i++) {
 		struct zone *z = &pg->node_zones[i];
-		for (cpu = 0; cpu < NR_CPUS; cpu++) {
-			struct per_cpu_pageset *ps = &z->pageset[cpu];
+		for_each_online_cpu(cpu) {
+			struct per_cpu_pageset *ps = zone_pcp(z,cpu);
 			numa_hit += ps->numa_hit;
 			numa_miss += ps->numa_miss;
 			numa_foreign += ps->numa_foreign;
@@ -111,13 +132,31 @@ static ssize_t node_read_numastat(struct sys_device * dev, char * buf)
 }
 static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);
 
+static ssize_t node_read_distance(struct sys_device * dev, char * buf)
+{
+	int nid = dev->id;
+	int len = 0;
+	int i;
+
+	/* buf currently PAGE_SIZE, need ~4 chars per node */
+	BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2);
+
+	for_each_online_node(i)
+		len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i));
+
+	len += sprintf(buf + len, "\n");
+	return len;
+}
+static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL);
+
+
 /*
  * register_node - Setup a driverfs device for a node.
  * @num - Node number to use when creating the device.
  *
  * Initialize and register the node device.
  */
-int __init register_node(struct node *node, int num, struct node *parent)
+int register_node(struct node *node, int num, struct node *parent)
 {
 	int error;
 
@@ -129,12 +168,29 @@ int __init register_node(struct node *node, int num, struct node *parent)
 		sysdev_create_file(&node->sysdev, &attr_cpumap);
 		sysdev_create_file(&node->sysdev, &attr_meminfo);
 		sysdev_create_file(&node->sysdev, &attr_numastat);
+		sysdev_create_file(&node->sysdev, &attr_distance);
 	}
 	return error;
 }
 
+/**
+ * unregister_node - unregister a node device
+ * @node: node going away
+ *
+ * Unregisters a node device @node.  All the devices on the node must be
+ * unregistered before calling this function.
+ */
+void unregister_node(struct node *node)
+{
+	sysdev_remove_file(&node->sysdev, &attr_cpumap);
+	sysdev_remove_file(&node->sysdev, &attr_meminfo);
+	sysdev_remove_file(&node->sysdev, &attr_numastat);
+	sysdev_remove_file(&node->sysdev, &attr_distance);
+
+	sysdev_unregister(&node->sysdev);
+}
 
-int __init register_node_type(void)
+static int __init register_node_type(void)
 {
 	return sysdev_class_register(&node_class);
 }