Messages in this thread Patch in this message | | | From | Michel Lespinasse <> | Subject | [PATCH 2/2] mlock: do not munlock pages in __do_fault() | Date | Mon, 7 Feb 2011 16:47:36 -0800 |
| |
If the page is going to be written to, __do_page needs to break COW. However, the old page (before breaking COW) was never mapped mapped into the current pte (__do_fault is only called when the pte is not present), so vmscan can't have marked the old page as PageMlocked due to being mapped in __do_fault's VMA. Therefore, __do_fault() does not need to worry about clearing PageMlocked() on the old page.
Signed-off-by: Michel Lespinasse <walken@google.com> --- mm/memory.c | 6 ------ 1 files changed, 0 insertions(+), 6 deletions(-)
diff --git a/mm/memory.c b/mm/memory.c index 32df03c..8e8c1832 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3051,12 +3051,6 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma, goto out; } charged = 1; - /* - * Don't let another task, with possibly unlocked vma, - * keep the mlocked page. - */ - if (vma->vm_flags & VM_LOCKED) - clear_page_mlock(vmf.page); copy_user_highpage(page, vmf.page, address, vma); __SetPageUptodate(page); } else { -- 1.7.3.1
| |