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authorKonstantin Khlebnikov <khlebnikov@openvz.org>2012-06-01 01:26:20 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2012-06-01 02:49:29 +0200
commitb1d4d9e0cbd0aecf40c3572e0c8f98de31b3b328 (patch)
tree5b3dca11bdaa14ce3e34e86016f98634d56fef07
parentproc: report file/anon bit in /proc/pid/pagemap (diff)
downloadlinux-b1d4d9e0cbd0aecf40c3572e0c8f98de31b3b328.tar.xz
linux-b1d4d9e0cbd0aecf40c3572e0c8f98de31b3b328.zip
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>
Diffstat (limited to '')
-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 02476f5889f1..e2c1155ac09a 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;