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authorKonstantin Khlebnikov <khlebnikov@openvz.org>2012-05-31 23:26:20 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2012-06-01 00:49:29 (GMT)
commitb1d4d9e0cbd0aecf40c3572e0c8f98de31b3b328 (patch)
tree5b3dca11bdaa14ce3e34e86016f98634d56fef07
parent052fb0d635df5d49dfc85687d94e1a87bf09378d (diff)
downloadlinux-b1d4d9e0cbd0aecf40c3572e0c8f98de31b3b328.tar.xz
proc/smaps: carefully handle migration entries
Currently smaps reports migration entries as "swap", as result "swap" can appears in shared mapping. This patch converts migration entries into pages and handles them as usual. Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: Pavel Emelyanov <xemul@parallels.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/proc/task_mmu.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 02476f5..e2c1155 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -402,18 +402,20 @@ static void smaps_pte_entry(pte_t ptent, unsigned long addr,
{
struct mem_size_stats *mss = walk->private;
struct vm_area_struct *vma = mss->vma;
- struct page *page;
+ struct page *page = NULL;
int mapcount;
- if (is_swap_pte(ptent)) {
- mss->swap += ptent_size;
- return;
- }
+ if (pte_present(ptent)) {
+ page = vm_normal_page(vma, addr, ptent);
+ } else if (is_swap_pte(ptent)) {
+ swp_entry_t swpent = pte_to_swp_entry(ptent);
- if (!pte_present(ptent))
- return;
+ if (!non_swap_entry(swpent))
+ mss->swap += ptent_size;
+ else if (is_migration_entry(swpent))
+ page = migration_entry_to_page(swpent);
+ }
- page = vm_normal_page(vma, addr, ptent);
if (!page)
return;