The patch titled
Subject: mm: hugetlb: fix __unmap_hugepage_range()
has been added to the -mm tree. Its filename is
mm-hugetlb-fix-__unmap_hugepage_range.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-hugetlb-fix-__unmap_hugepage_range.patch
echo and later at
echo http://ozlabs.org/~akpm/mmotm/broken-out/mm-hugetlb-fix-__unmap_hugepage_range.patch
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------------------------------------------------------
From: "Hillf Danton" <hillf.zj@xxxxxxxxxxxxxxx>
Subject: mm: hugetlb: fix __unmap_hugepage_range()
First, after flushing TLB, we have no need to scan pte from start again.
Second, before bail out loop, the address is forwarded one step.
Signed-off-by: Hillf Danton <hillf.zj@xxxxxxxxxxxxxxx>
Reviewed-by: Michal Hocko <mhocko@xxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN mm/hugetlb.c~mm-hugetlb-fix-__unmap_hugepage_range mm/hugetlb.c
--- a/mm/hugetlb.c~mm-hugetlb-fix-__unmap_hugepage_range
+++ a/mm/hugetlb.c
@@ -2641,8 +2641,9 @@ void __unmap_hugepage_range(struct mmu_g
tlb_start_vma(tlb, vma);
mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
+ address = start;
again:
- for (address = start; address < end; address += sz) {
+ for (; address < end; address += sz) {
ptep = huge_pte_offset(mm, address);
if (!ptep)
continue;
@@ -2689,6 +2690,7 @@ again:
page_remove_rmap(page);
force_flush = !__tlb_remove_page(tlb, page);
if (force_flush) {
+ address += sz;
spin_unlock(ptl);
break;
}
_
Patches currently in -mm which might be from hillf.zj@xxxxxxxxxxxxxxx are
mm-hugetlb-fix-__unmap_hugepage_range.patch
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