Messages in this thread Patch in this message | | | From | Naoya Horiguchi <> | Subject | [PATCH] memcg: fix mapcount check in move charge code for anonymous page | Date | Fri, 2 Mar 2012 15:35:08 -0500 |
| |
Currently charge on shared anonyous pages is supposed not to moved in task migration. To implement this, we need to check that mapcount > 1, instread of > 2. So this patch fixes it.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> --- mm/memcontrol.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git linux-next-20120228.orig/mm/memcontrol.c linux-next-20120228/mm/memcontrol.c index b6d1bab..785f6d3 100644 --- linux-next-20120228.orig/mm/memcontrol.c +++ linux-next-20120228/mm/memcontrol.c @@ -5102,7 +5102,7 @@ static struct page *mc_handle_present_pte(struct vm_area_struct *vma, return NULL; if (PageAnon(page)) { /* we don't move shared anon */ - if (!move_anon() || page_mapcount(page) > 2) + if (!move_anon() || page_mapcount(page) > 1) return NULL; } else if (!move_file()) /* we ignore mapcount for file pages */ -- 1.7.7.6
| |