diff options
Diffstat (limited to 'fs/proc/task_mmu.c')
-rw-r--r-- | fs/proc/task_mmu.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 28b4a0253a9..64e84cadfa3 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -2,6 +2,8 @@ #include <linux/hugetlb.h> #include <linux/mount.h> #include <linux/seq_file.h> +#include <linux/pagemap.h> +#include <linux/mempolicy.h> #include <asm/elf.h> #include <asm/uaccess.h> #include "internal.h" @@ -233,3 +235,133 @@ struct seq_operations proc_pid_maps_op = { .stop = m_stop, .show = show_map }; + +#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(const struct vm_area_struct *vma) +{ + struct page *page; + unsigned long vaddr; + struct mm_struct *mm = vma->vm_mm; + int i; + 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; + + spin_lock(&mm->page_table_lock); + for (vaddr = vma->vm_start; vaddr < vma->vm_end; vaddr += PAGE_SIZE) { + page = follow_page(mm, 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)]++; + } + } + spin_unlock(&mm->page_table_lock); + 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 (test_bit(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; +} + +struct seq_operations proc_pid_numa_maps_op = { + .start = m_start, + .next = m_next, + .stop = m_stop, + .show = show_numa_map +}; +#endif |