patch-2_6_7-vs1_9_1_12

[linux-2.6.git] / drivers / base / node.c

diff --git a/drivers/base/node.c b/drivers/base/node.c
index a35701c..b5aa9dc 100644 (file)
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -21,22 +21,30 @@ static ssize_t node_read_cpumap(struct sys_device * dev, char * buf)
        cpumask_t mask = node_dev->cpumap;
        int len;
 
-       /* FIXME - someone should pass us a buffer size (count) or
-        * use seq_file or something to avoid buffer overrun risk. */
-       len = cpumask_scnprintf(buf, 99 /* XXX FIXME */, mask);
+       /* 2004/06/03: buf currently PAGE_SIZE, need > 1 char per 4 bits. */
+       BUILD_BUG_ON(NR_CPUS/4 > PAGE_SIZE/2);
+
+       len = cpumask_scnprintf(buf, PAGE_SIZE-1, mask);
        len += sprintf(buf + len, "\n");
        return len;
 }
 
 static SYSDEV_ATTR(cpumap,S_IRUGO,node_read_cpumap,NULL);
 
+/* Can be overwritten by architecture specific code. */
+int __attribute__((weak)) hugetlb_report_node_meminfo(int node, char *buf)
+{
+       return 0;
+}
+
 #define K(x) ((x) << (PAGE_SHIFT - 10))
 static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
 {
+       int n;
        int nid = dev->id;
        struct sysinfo i;
        si_meminfo_node(&i, nid);
-       return sprintf(buf, "\n"
+       n = sprintf(buf, "\n"
                       "Node %d MemTotal:     %8lu kB\n"
                       "Node %d MemFree:      %8lu kB\n"
                       "Node %d MemUsed:      %8lu kB\n"
@@ -51,10 +59,52 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
                       nid, K(i.freehigh),
                       nid, K(i.totalram-i.totalhigh),
                       nid, K(i.freeram-i.freehigh));
+       n += hugetlb_report_node_meminfo(nid, buf + n);
+       return n;
 }
+
 #undef K 
 static SYSDEV_ATTR(meminfo,S_IRUGO,node_read_meminfo,NULL);
 
+static ssize_t node_read_numastat(struct sys_device * dev, char * buf)
+{
+       unsigned long numa_hit, numa_miss, interleave_hit, numa_foreign;
+       unsigned long local_node, other_node;
+       int i, cpu;
+       pg_data_t *pg = NODE_DATA(dev->id);
+       numa_hit = 0;
+       numa_miss = 0;
+       interleave_hit = 0;
+       numa_foreign = 0;
+       local_node = 0;
+       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];
+                       numa_hit += ps->numa_hit;
+                       numa_miss += ps->numa_miss;
+                       numa_foreign += ps->numa_foreign;
+                       interleave_hit += ps->interleave_hit;
+                       local_node += ps->local_node;
+                       other_node += ps->other_node;
+               }
+       }
+       return sprintf(buf,
+                      "numa_hit %lu\n"
+                      "numa_miss %lu\n"
+                      "numa_foreign %lu\n"
+                      "interleave_hit %lu\n"
+                      "local_node %lu\n"
+                      "other_node %lu\n",
+                      numa_hit,
+                      numa_miss,
+                      numa_foreign,
+                      interleave_hit,
+                      local_node,
+                      other_node);
+}
+static SYSDEV_ATTR(numastat,S_IRUGO,node_read_numastat,NULL);
 
 /*
  * register_node - Setup a driverfs device for a node.
@@ -74,6 +124,7 @@ int __init register_node(struct node *node, int num, struct node *parent)
        if (!error){
                sysdev_create_file(&node->sysdev, &attr_cpumap);
                sysdev_create_file(&node->sysdev, &attr_meminfo);
+               sysdev_create_file(&node->sysdev, &attr_numastat);
        }
        return error;
 }