mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-16 14:02:10 +00:00
mm: add node states sysfs class attributeS
Add a per node state sysfs class attribute file to /sys/devices/system/node to display node state masks. E.g., on a 4-cell HP ia64 NUMA platform, we have 5 nodes: 4 representing the actual hardware cells and one memory-only pseudo-node representing a small amount [512MB] of "hardware interleaved" memory. With this patch, in /sys/devices/system/node we see: #ls -1F /sys/devices/system/node has_cpu has_normal_memory node0/ node1/ node2/ node3/ node4/ online possible #cat /sys/devices/system/node/possible 0-255 #cat /sys/devices/system/node/online 0-4 #cat /sys/devices/system/node/has_normal_memory 0-4 #cat /sys/devices/system/node/has_cpu 0-3 Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com> Acked-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
e2fc88d064
commit
bde631a518
@ -12,6 +12,7 @@
|
||||
#include <linux/topology.h>
|
||||
#include <linux/nodemask.h>
|
||||
#include <linux/cpu.h>
|
||||
#include <linux/device.h>
|
||||
|
||||
static struct sysdev_class node_class = {
|
||||
set_kset_name("node"),
|
||||
@ -232,8 +233,96 @@ void unregister_one_node(int nid)
|
||||
unregister_node(&node_devices[nid]);
|
||||
}
|
||||
|
||||
/*
|
||||
* node states attributes
|
||||
*/
|
||||
|
||||
static ssize_t print_nodes_state(enum node_states state, char *buf)
|
||||
{
|
||||
int n;
|
||||
|
||||
n = nodelist_scnprintf(buf, PAGE_SIZE, node_states[state]);
|
||||
if (n > 0 && PAGE_SIZE > n + 1) {
|
||||
*(buf + n++) = '\n';
|
||||
*(buf + n++) = '\0';
|
||||
}
|
||||
return n;
|
||||
}
|
||||
|
||||
static ssize_t print_nodes_possible(struct sysdev_class *class, char *buf)
|
||||
{
|
||||
return print_nodes_state(N_POSSIBLE, buf);
|
||||
}
|
||||
|
||||
static ssize_t print_nodes_online(struct sysdev_class *class, char *buf)
|
||||
{
|
||||
return print_nodes_state(N_ONLINE, buf);
|
||||
}
|
||||
|
||||
static ssize_t print_nodes_has_normal_memory(struct sysdev_class *class,
|
||||
char *buf)
|
||||
{
|
||||
return print_nodes_state(N_NORMAL_MEMORY, buf);
|
||||
}
|
||||
|
||||
static ssize_t print_nodes_has_cpu(struct sysdev_class *class, char *buf)
|
||||
{
|
||||
return print_nodes_state(N_CPU, buf);
|
||||
}
|
||||
|
||||
static SYSDEV_CLASS_ATTR(possible, 0444, print_nodes_possible, NULL);
|
||||
static SYSDEV_CLASS_ATTR(online, 0444, print_nodes_online, NULL);
|
||||
static SYSDEV_CLASS_ATTR(has_normal_memory, 0444, print_nodes_has_normal_memory,
|
||||
NULL);
|
||||
static SYSDEV_CLASS_ATTR(has_cpu, 0444, print_nodes_has_cpu, NULL);
|
||||
|
||||
#ifdef CONFIG_HIGHMEM
|
||||
static ssize_t print_nodes_has_high_memory(struct sysdev_class *class,
|
||||
char *buf)
|
||||
{
|
||||
return print_nodes_state(N_HIGH_MEMORY, buf);
|
||||
}
|
||||
|
||||
static SYSDEV_CLASS_ATTR(has_high_memory, 0444, print_nodes_has_high_memory,
|
||||
NULL);
|
||||
#endif
|
||||
|
||||
struct sysdev_class_attribute *node_state_attr[] = {
|
||||
&attr_possible,
|
||||
&attr_online,
|
||||
&attr_has_normal_memory,
|
||||
#ifdef CONFIG_HIGHMEM
|
||||
&attr_has_high_memory,
|
||||
#endif
|
||||
&attr_has_cpu,
|
||||
};
|
||||
|
||||
static int node_states_init(void)
|
||||
{
|
||||
int i;
|
||||
int err = 0;
|
||||
|
||||
for (i = 0; i < NR_NODE_STATES; i++) {
|
||||
int ret;
|
||||
ret = sysdev_class_create_file(&node_class, node_state_attr[i]);
|
||||
if (!err)
|
||||
err = ret;
|
||||
}
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __init register_node_type(void)
|
||||
{
|
||||
return sysdev_class_register(&node_class);
|
||||
int ret;
|
||||
|
||||
ret = sysdev_class_register(&node_class);
|
||||
if (!ret)
|
||||
ret = node_states_init();
|
||||
|
||||
/*
|
||||
* Note: we're not going to unregister the node class if we fail
|
||||
* to register the node state class attribute files.
|
||||
*/
|
||||
return ret;
|
||||
}
|
||||
postcore_initcall(register_node_type);
|
||||
|
Loading…
Reference in New Issue
Block a user