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authorStephen Wilson <wilsons@start.ca>2011-05-24 17:12:47 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-25 08:39:34 -0700
commitf69ff943df6972aae96c10733b6847fa094d8a59 (patch)
treeb0812b5e0b1376f193a9db088ebd8856deabed00 /fs/proc/task_mmu.c
parent13057efb0a0063eb8042d99093ec88a52c4f1593 (diff)
downloadop-kernel-dev-f69ff943df6972aae96c10733b6847fa094d8a59.zip
op-kernel-dev-f69ff943df6972aae96c10733b6847fa094d8a59.tar.gz
mm: proc: move show_numa_map() to fs/proc/task_mmu.c
Moving show_numa_map() from mempolicy.c to task_mmu.c solves several issues. - Having the show() operation "miles away" from the corresponding seq_file iteration operations is a maintenance burden. - The need to export ad hoc info like struct proc_maps_private is eliminated. - The implementation of show_numa_map() can be improved in a simple manner by cooperating with the other seq_file operations (start, stop, etc) -- something that would be messy to do without this change. Signed-off-by: Stephen Wilson <wilsons@start.ca> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Hugh Dickins <hughd@google.com> Cc: David Rientjes <rientjes@google.com> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc/task_mmu.c')
-rw-r--r--fs/proc/task_mmu.c184
1 files changed, 182 insertions, 2 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 318d865..2ed53d1 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -858,8 +858,188 @@ const struct file_operations proc_pagemap_operations = {
#endif /* CONFIG_PROC_PAGE_MONITOR */
#ifdef CONFIG_NUMA
-extern int show_numa_map(struct seq_file *m, void *v);
+struct numa_maps {
+ struct vm_area_struct *vma;
+ unsigned long pages;
+ unsigned long anon;
+ unsigned long active;
+ unsigned long writeback;
+ unsigned long mapcount_max;
+ unsigned long dirty;
+ unsigned long swapcache;
+ unsigned long node[MAX_NUMNODES];
+};
+
+static void gather_stats(struct page *page, struct numa_maps *md, int pte_dirty)
+{
+ int count = page_mapcount(page);
+
+ md->pages++;
+ if (pte_dirty || PageDirty(page))
+ md->dirty++;
+
+ if (PageSwapCache(page))
+ md->swapcache++;
+
+ if (PageActive(page) || PageUnevictable(page))
+ md->active++;
+
+ if (PageWriteback(page))
+ md->writeback++;
+
+ if (PageAnon(page))
+ md->anon++;
+
+ if (count > md->mapcount_max)
+ md->mapcount_max = count;
+
+ md->node[page_to_nid(page)]++;
+}
+
+static int gather_pte_stats(pmd_t *pmd, unsigned long addr,
+ unsigned long end, struct mm_walk *walk)
+{
+ struct numa_maps *md;
+ spinlock_t *ptl;
+ pte_t *orig_pte;
+ pte_t *pte;
+
+ md = walk->private;
+ orig_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
+ do {
+ struct page *page;
+ int nid;
+
+ if (!pte_present(*pte))
+ continue;
+
+ page = vm_normal_page(md->vma, addr, *pte);
+ if (!page)
+ continue;
+
+ if (PageReserved(page))
+ continue;
+
+ nid = page_to_nid(page);
+ if (!node_isset(nid, node_states[N_HIGH_MEMORY]))
+ continue;
+
+ gather_stats(page, md, pte_dirty(*pte));
+
+ } while (pte++, addr += PAGE_SIZE, addr != end);
+ pte_unmap_unlock(orig_pte, ptl);
+ return 0;
+}
+#ifdef CONFIG_HUGETLB_PAGE
+static int gather_hugetbl_stats(pte_t *pte, unsigned long hmask,
+ unsigned long addr, unsigned long end, struct mm_walk *walk)
+{
+ struct numa_maps *md;
+ struct page *page;
+
+ if (pte_none(*pte))
+ return 0;
+
+ page = pte_page(*pte);
+ if (!page)
+ return 0;
+
+ md = walk->private;
+ gather_stats(page, md, pte_dirty(*pte));
+ return 0;
+}
+
+#else
+static int gather_hugetbl_stats(pte_t *pte, unsigned long hmask,
+ unsigned long addr, unsigned long end, struct mm_walk *walk)
+{
+ return 0;
+}
+#endif
+
+/*
+ * Display pages allocated per node and memory policy via /proc.
+ */
+static int show_numa_map(struct seq_file *m, void *v)
+{
+ struct proc_maps_private *priv = m->private;
+ struct vm_area_struct *vma = v;
+ struct numa_maps *md;
+ struct file *file = vma->vm_file;
+ struct mm_struct *mm = vma->vm_mm;
+ struct mm_walk walk = {};
+ struct mempolicy *pol;
+ int n;
+ char buffer[50];
+
+ if (!mm)
+ return 0;
+
+ md = kzalloc(sizeof(struct numa_maps), GFP_KERNEL);
+ if (!md)
+ return 0;
+
+ md->vma = vma;
+
+ walk.hugetlb_entry = gather_hugetbl_stats;
+ walk.pmd_entry = gather_pte_stats;
+ walk.private = md;
+ walk.mm = mm;
+
+ pol = get_vma_policy(priv->task, vma, vma->vm_start);
+ mpol_to_str(buffer, sizeof(buffer), pol, 0);
+ mpol_cond_put(pol);
+
+ seq_printf(m, "%08lx %s", vma->vm_start, buffer);
+
+ if (file) {
+ seq_printf(m, " file=");
+ seq_path(m, &file->f_path, "\n\t= ");
+ } else if (vma->vm_start <= mm->brk && vma->vm_end >= mm->start_brk) {
+ seq_printf(m, " heap");
+ } else if (vma->vm_start <= mm->start_stack &&
+ vma->vm_end >= mm->start_stack) {
+ seq_printf(m, " stack");
+ }
+
+ walk_page_range(vma->vm_start, vma->vm_end, &walk);
+
+ if (!md->pages)
+ goto out;
+
+ if (md->anon)
+ seq_printf(m, " anon=%lu", md->anon);
+
+ if (md->dirty)
+ seq_printf(m, " dirty=%lu", md->dirty);
+
+ if (md->pages != md->anon && md->pages != md->dirty)
+ seq_printf(m, " mapped=%lu", md->pages);
+
+ if (md->mapcount_max > 1)
+ seq_printf(m, " mapmax=%lu", md->mapcount_max);
+
+ if (md->swapcache)
+ seq_printf(m, " swapcache=%lu", md->swapcache);
+
+ if (md->active < md->pages && !is_vm_hugetlb_page(vma))
+ seq_printf(m, " active=%lu", md->active);
+
+ if (md->writeback)
+ seq_printf(m, " writeback=%lu", md->writeback);
+
+ for_each_node_state(n, N_HIGH_MEMORY)
+ if (md->node[n])
+ seq_printf(m, " N%d=%lu", n, md->node[n]);
+out:
+ seq_putc(m, '\n');
+ kfree(md);
+
+ if (m->count < m->size)
+ m->version = (vma != priv->tail_vma) ? vma->vm_start : 0;
+ return 0;
+}
static const struct seq_operations proc_pid_numa_maps_op = {
.start = m_start,
.next = m_next,
@@ -878,4 +1058,4 @@ const struct file_operations proc_numa_maps_operations = {
.llseek = seq_lseek,
.release = seq_release_private,
};
-#endif
+#endif /* CONFIG_NUMA */
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