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![Christoph Lameter](/assets/img/avatar_default.png)
zone_pcp() only returns valid values if the processor is online. Change node_read_numastat() to only scan online processors. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
197 lines
5.2 KiB
C
197 lines
5.2 KiB
C
/*
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* drivers/base/node.c - basic Node class support
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*/
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#include <linux/sysdev.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/node.h>
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#include <linux/hugetlb.h>
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#include <linux/cpumask.h>
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#include <linux/topology.h>
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#include <linux/nodemask.h>
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static struct sysdev_class node_class = {
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set_kset_name("node"),
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};
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static ssize_t node_read_cpumap(struct sys_device * dev, char * buf)
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{
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struct node *node_dev = to_node(dev);
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cpumask_t mask = node_to_cpumask(node_dev->sysdev.id);
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int len;
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/* 2004/06/03: buf currently PAGE_SIZE, need > 1 char per 4 bits. */
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BUILD_BUG_ON(MAX_NUMNODES/4 > PAGE_SIZE/2);
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len = cpumask_scnprintf(buf, PAGE_SIZE-1, mask);
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len += sprintf(buf + len, "\n");
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return len;
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}
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static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumap, NULL);
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#define K(x) ((x) << (PAGE_SHIFT - 10))
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static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
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{
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int n;
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int nid = dev->id;
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struct sysinfo i;
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struct page_state ps;
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unsigned long inactive;
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unsigned long active;
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unsigned long free;
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si_meminfo_node(&i, nid);
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get_page_state_node(&ps, nid);
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__get_zone_counts(&active, &inactive, &free, NODE_DATA(nid));
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/* Check for negative values in these approximate counters */
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if ((long)ps.nr_dirty < 0)
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ps.nr_dirty = 0;
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if ((long)ps.nr_writeback < 0)
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ps.nr_writeback = 0;
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if ((long)ps.nr_mapped < 0)
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ps.nr_mapped = 0;
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if ((long)ps.nr_slab < 0)
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ps.nr_slab = 0;
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n = sprintf(buf, "\n"
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"Node %d MemTotal: %8lu kB\n"
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"Node %d MemFree: %8lu kB\n"
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"Node %d MemUsed: %8lu kB\n"
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"Node %d Active: %8lu kB\n"
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"Node %d Inactive: %8lu kB\n"
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"Node %d HighTotal: %8lu kB\n"
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"Node %d HighFree: %8lu kB\n"
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"Node %d LowTotal: %8lu kB\n"
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"Node %d LowFree: %8lu kB\n"
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"Node %d Dirty: %8lu kB\n"
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"Node %d Writeback: %8lu kB\n"
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"Node %d Mapped: %8lu kB\n"
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"Node %d Slab: %8lu kB\n",
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nid, K(i.totalram),
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nid, K(i.freeram),
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nid, K(i.totalram - i.freeram),
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nid, K(active),
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nid, K(inactive),
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nid, K(i.totalhigh),
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nid, K(i.freehigh),
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nid, K(i.totalram - i.totalhigh),
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nid, K(i.freeram - i.freehigh),
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nid, K(ps.nr_dirty),
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nid, K(ps.nr_writeback),
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nid, K(ps.nr_mapped),
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nid, K(ps.nr_slab));
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n += hugetlb_report_node_meminfo(nid, buf + n);
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return n;
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}
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#undef K
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static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL);
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static ssize_t node_read_numastat(struct sys_device * dev, char * buf)
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{
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unsigned long numa_hit, numa_miss, interleave_hit, numa_foreign;
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unsigned long local_node, other_node;
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int i, cpu;
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pg_data_t *pg = NODE_DATA(dev->id);
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numa_hit = 0;
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numa_miss = 0;
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interleave_hit = 0;
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numa_foreign = 0;
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local_node = 0;
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other_node = 0;
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for (i = 0; i < MAX_NR_ZONES; i++) {
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struct zone *z = &pg->node_zones[i];
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for_each_online_cpu(cpu) {
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struct per_cpu_pageset *ps = zone_pcp(z,cpu);
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numa_hit += ps->numa_hit;
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numa_miss += ps->numa_miss;
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numa_foreign += ps->numa_foreign;
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interleave_hit += ps->interleave_hit;
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local_node += ps->local_node;
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other_node += ps->other_node;
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}
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}
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return sprintf(buf,
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"numa_hit %lu\n"
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"numa_miss %lu\n"
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"numa_foreign %lu\n"
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"interleave_hit %lu\n"
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"local_node %lu\n"
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"other_node %lu\n",
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numa_hit,
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numa_miss,
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numa_foreign,
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interleave_hit,
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local_node,
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other_node);
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}
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static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);
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static ssize_t node_read_distance(struct sys_device * dev, char * buf)
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{
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int nid = dev->id;
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int len = 0;
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int i;
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/* buf currently PAGE_SIZE, need ~4 chars per node */
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BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2);
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for_each_online_node(i)
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len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i));
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len += sprintf(buf + len, "\n");
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return len;
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}
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static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL);
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/*
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* register_node - Setup a driverfs device for a node.
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* @num - Node number to use when creating the device.
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*
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* Initialize and register the node device.
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*/
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int register_node(struct node *node, int num, struct node *parent)
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{
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int error;
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node->sysdev.id = num;
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node->sysdev.cls = &node_class;
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error = sysdev_register(&node->sysdev);
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if (!error){
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sysdev_create_file(&node->sysdev, &attr_cpumap);
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sysdev_create_file(&node->sysdev, &attr_meminfo);
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sysdev_create_file(&node->sysdev, &attr_numastat);
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sysdev_create_file(&node->sysdev, &attr_distance);
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}
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return error;
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}
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/**
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* unregister_node - unregister a node device
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* @node: node going away
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*
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* Unregisters a node device @node. All the devices on the node must be
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* unregistered before calling this function.
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*/
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void unregister_node(struct node *node)
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{
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sysdev_remove_file(&node->sysdev, &attr_cpumap);
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sysdev_remove_file(&node->sysdev, &attr_meminfo);
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sysdev_remove_file(&node->sysdev, &attr_numastat);
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sysdev_remove_file(&node->sysdev, &attr_distance);
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sysdev_unregister(&node->sysdev);
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}
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static int __init register_node_type(void)
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{
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return sysdev_class_register(&node_class);
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}
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postcore_initcall(register_node_type);
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