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[PATCH] Fold numa_maps into mempolicies.c

Browse source 
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 <[email protected]>
Cc: Andi Kleen <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christoph Lameter 2006-01-08 01:01:02 -08:00 • committed by Linus Torvalds
commit 1a75a6c825
2 changed files with 142 additions and 123 deletions
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127
fs/proc/task_mmu.c
View file

@ -390,129 +390,12 @@ struct seq_operations proc_pid_smaps_op = {
};
#ifdef CONFIG_NUMA
struct numa_maps {
unsigned long pages;
unsigned long anon;
unsigned long mapped;
unsigned long mapcount_max;
unsigned long node[MAX_NUMNODES];
};
/*
* Calculate numa node maps for a vma
*/
static struct numa_maps *get_numa_maps(struct vm_area_struct *vma)
{
int i;
struct page *page;
unsigned long vaddr;
struct numa_maps *md = kmalloc(sizeof(struct numa_maps), GFP_KERNEL);
if (!md)
return NULL;
md->pages = 0;
md->anon = 0;
md->mapped = 0;
md->mapcount_max = 0;
for_each_node(i)
md->node[i] =0;
for (vaddr = vma->vm_start; vaddr < vma->vm_end; vaddr += PAGE_SIZE) {
page = follow_page(vma, vaddr, 0);
if (page) {
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();
}
return md;
}
static int show_numa_map(struct seq_file *m, void *v)
{
struct task_struct *task = m->private;
struct vm_area_struct *vma = v;
struct mempolicy *pol;
struct numa_maps *md;
struct zone **z;
int n;
int first;
if (!vma->vm_mm)
return 0;
md = get_numa_maps(vma);
if (!md)
return 0;
seq_printf(m, "%08lx", vma->vm_start);
pol = get_vma_policy(task, vma, vma->vm_start);
/* Print policy */
switch (pol->policy) {
case MPOL_PREFERRED:
seq_printf(m, " prefer=%d", pol->v.preferred_node);
break;
case MPOL_BIND:
seq_printf(m, " bind={");
first = 1;
for (z = pol->v.zonelist->zones; *z; z++) {
if (!first)
seq_putc(m, ',');
else
first = 0;
seq_printf(m, "%d/%s", (*z)->zone_pgdat->node_id,
(*z)->name);
}
seq_putc(m, '}');
break;
case MPOL_INTERLEAVE:
seq_printf(m, " interleave={");
first = 1;
for_each_node(n) {
if (node_isset(n, pol->v.nodes)) {
if (!first)
seq_putc(m,',');
else
first = 0;
seq_printf(m, "%d",n);
}
}
seq_putc(m, '}');
break;
default:
seq_printf(m," default");
break;
}
seq_printf(m, " MaxRef=%lu Pages=%lu Mapped=%lu",
md->mapcount_max, md->pages, md->mapped);
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) /* vma is copied successfully */
m->version = (vma != get_gate_vma(task)) ? vma->vm_start : 0;
return 0;
}
extern int show_numa_map(struct seq_file *m, void *v);
struct seq_operations proc_pid_numa_maps_op = {
.start = m_start,
.next = m_next,
.stop = m_stop,
.show = show_numa_map
.start = m_start,
.next = m_next,
.stop = m_stop,
.show = show_numa_map
};
#endif