Flush the entire user address space from the TLB for each VMA in the
task_struct list when clearing reference bits with /proc/pid/clear_refs.
It's more efficient than flushing each page individually depending on
pte_young().
Cc: Paul Mundt <[EMAIL PROTECTED]>
Cc: Christoph Lameter <[EMAIL PROTECTED]>
Signed-off-by: David Rientjes <[EMAIL PROTECTED]>
---
fs/proc/task_mmu.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -276,7 +276,6 @@ static void clear_refs_one_pmd(struct vm_area_struct *vma,
pmd_t *pmd,
if (pte_young(ptent)) {
ptent = pte_mkold(ptent);
set_pte_at(vma->vm_mm, addr, pte, ptent);
- flush_tlb_page(vma, addr);
}
ClearPageReferenced(page);
}
@@ -358,6 +357,7 @@ void clear_refs_smap(struct mm_struct *mm)
for (vma = mm->mmap; vma; vma = vma->vm_next)
if (vma->vm_mm && !is_vm_hugetlb_page(vma))
for_each_pmd(vma, clear_refs_one_pmd, NULL);
+ flush_tlb_mm(mm);
up_read(&mm->mmap_sem);
}
-
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