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...@alibaba-inc.com>
---
--- a/mm/hugetlb.c Fri Oct 31 11:47:25 2014
+++ b/mm/hugetlb.c Fri Oct 31 11:52:42 2014
@@ -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;
}
--
--
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