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authorStephen Wilson <wilsons@start.ca>2011-05-25 04:12:47 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-25 19:39:34 +0400
commitf69ff943df6972aae96c10733b6847fa094d8a59 (patch)
treeb0812b5e0b1376f193a9db088ebd8856deabed00 /mm/mempolicy.c
parent13057efb0a0063eb8042d99093ec88a52c4f1593 (diff)
downloadlinux-f69ff943df6972aae96c10733b6847fa094d8a59.tar.xz
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 'mm/mempolicy.c')
-rw-r--r--mm/mempolicy.c183
1 files changed, 0 insertions, 183 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 3b6e4057fab8..e7fb9d25c54e 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2525,186 +2525,3 @@ int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol, int no_context)
}
return p - buffer;
}
-
-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.
- */
-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;
-}