[PATCH] Fold numa_maps into mempolicies.c
First discussed at http://marc.theaimsgroup.com/?t=113149255100001&r=1&w=2 - Use the check_range() in mempolicy.c to gather statistics. - Improve the numa_maps code in general and fix some comments. Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christoph Lameter
committed by
Linus Torvalds
Linus Torvalds
parent
38e35860db
commit
1a75a6c825
138
mm/mempolicy.c
138
mm/mempolicy.c
@@ -84,6 +84,8 @@
|
||||
#include <linux/compat.h>
|
||||
#include <linux/mempolicy.h>
|
||||
#include <linux/swap.h>
|
||||
#include <linux/seq_file.h>
|
||||
#include <linux/proc_fs.h>
|
||||
|
||||
#include <asm/tlbflush.h>
|
||||
#include <asm/uaccess.h>
|
||||
@@ -91,6 +93,7 @@
|
||||
/* Internal flags */
|
||||
#define MPOL_MF_DISCONTIG_OK (MPOL_MF_INTERNAL << 0) /* Skip checks for continuous vmas */
|
||||
#define MPOL_MF_INVERT (MPOL_MF_INTERNAL << 1) /* Invert check for nodemask */
|
||||
#define MPOL_MF_STATS (MPOL_MF_INTERNAL << 2) /* Gather statistics */
|
||||
|
||||
static kmem_cache_t *policy_cache;
|
||||
static kmem_cache_t *sn_cache;
|
||||
@@ -228,6 +231,8 @@ static void migrate_page_add(struct vm_area_struct *vma,
|
||||
}
|
||||
}
|
||||
|
||||
static void gather_stats(struct page *, void *);
|
||||
|
||||
/* Scan through pages checking if pages follow certain conditions. */
|
||||
static int check_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
|
||||
unsigned long addr, unsigned long end,
|
||||
@@ -252,7 +257,9 @@ static int check_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
|
||||
if (node_isset(nid, *nodes) == !!(flags & MPOL_MF_INVERT))
|
||||
continue;
|
||||
|
||||
if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL))
|
||||
if (flags & MPOL_MF_STATS)
|
||||
gather_stats(page, private);
|
||||
else if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL))
|
||||
migrate_page_add(vma, page, private, flags);
|
||||
else
|
||||
break;
|
||||
@@ -1460,3 +1467,132 @@ void numa_policy_rebind(const nodemask_t *old, const nodemask_t *new)
|
||||
{
|
||||
rebind_policy(current->mempolicy, old, new);
|
||||
}
|
||||
|
||||
/*
|
||||
* Display pages allocated per node and memory policy via /proc.
|
||||
*/
|
||||
|
||||
static const char *policy_types[] = { "default", "prefer", "bind",
|
||||
"interleave" };
|
||||
|
||||
/*
|
||||
* Convert a mempolicy into a string.
|
||||
* Returns the number of characters in buffer (if positive)
|
||||
* or an error (negative)
|
||||
*/
|
||||
static inline int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol)
|
||||
{
|
||||
char *p = buffer;
|
||||
int l;
|
||||
nodemask_t nodes;
|
||||
int mode = pol ? pol->policy : MPOL_DEFAULT;
|
||||
|
||||
switch (mode) {
|
||||
case MPOL_DEFAULT:
|
||||
nodes_clear(nodes);
|
||||
break;
|
||||
|
||||
case MPOL_PREFERRED:
|
||||
nodes_clear(nodes);
|
||||
node_set(pol->v.preferred_node, nodes);
|
||||
break;
|
||||
|
||||
case MPOL_BIND:
|
||||
get_zonemask(pol, &nodes);
|
||||
break;
|
||||
|
||||
case MPOL_INTERLEAVE:
|
||||
nodes = pol->v.nodes;
|
||||
break;
|
||||
|
||||
default:
|
||||
BUG();
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
l = strlen(policy_types[mode]);
|
||||
if (buffer + maxlen < p + l + 1)
|
||||
return -ENOSPC;
|
||||
|
||||
strcpy(p, policy_types[mode]);
|
||||
p += l;
|
||||
|
||||
if (!nodes_empty(nodes)) {
|
||||
if (buffer + maxlen < p + 2)
|
||||
return -ENOSPC;
|
||||
*p++ = '=';
|
||||
p += nodelist_scnprintf(p, buffer + maxlen - p, nodes);
|
||||
}
|
||||
return p - buffer;
|
||||
}
|
||||
|
||||
struct numa_maps {
|
||||
unsigned long pages;
|
||||
unsigned long anon;
|
||||
unsigned long mapped;
|
||||
unsigned long mapcount_max;
|
||||
unsigned long node[MAX_NUMNODES];
|
||||
};
|
||||
|
||||
static void gather_stats(struct page *page, void *private)
|
||||
{
|
||||
struct numa_maps *md = private;
|
||||
int count = page_mapcount(page);
|
||||
|
||||
if (count)
|
||||
md->mapped++;
|
||||
|
||||
if (count > md->mapcount_max)
|
||||
md->mapcount_max = count;
|
||||
|
||||
md->pages++;
|
||||
|
||||
if (PageAnon(page))
|
||||
md->anon++;
|
||||
|
||||
md->node[page_to_nid(page)]++;
|
||||
cond_resched();
|
||||
}
|
||||
|
||||
int show_numa_map(struct seq_file *m, void *v)
|
||||
{
|
||||
struct task_struct *task = m->private;
|
||||
struct vm_area_struct *vma = v;
|
||||
struct numa_maps *md;
|
||||
int n;
|
||||
char buffer[50];
|
||||
|
||||
if (!vma->vm_mm)
|
||||
return 0;
|
||||
|
||||
md = kzalloc(sizeof(struct numa_maps), GFP_KERNEL);
|
||||
if (!md)
|
||||
return 0;
|
||||
|
||||
check_pgd_range(vma, vma->vm_start, vma->vm_end,
|
||||
&node_online_map, MPOL_MF_STATS, md);
|
||||
|
||||
if (md->pages) {
|
||||
mpol_to_str(buffer, sizeof(buffer),
|
||||
get_vma_policy(task, vma, vma->vm_start));
|
||||
|
||||
seq_printf(m, "%08lx %s pages=%lu mapped=%lu maxref=%lu",
|
||||
vma->vm_start, buffer, md->pages,
|
||||
md->mapped, md->mapcount_max);
|
||||
|
||||
if (md->anon)
|
||||
seq_printf(m," anon=%lu",md->anon);
|
||||
|
||||
for_each_online_node(n)
|
||||
if (md->node[n])
|
||||
seq_printf(m, " N%d=%lu", n, md->node[n]);
|
||||
|
||||
seq_putc(m, '\n');
|
||||
}
|
||||
kfree(md);
|
||||
|
||||
if (m->count < m->size)
|
||||
m->version = (vma != get_gate_vma(task)) ? vma->vm_start : 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user