On Mon, Nov 28, 2016 at 6:57 PM, Aaron Lu <aaron...@intel.com> wrote: > > Here is a fix patch, sorry for the trouble.
I don't think you tested this one.. You've now essentially reverted 5d1904204c99 entirely by making the new force_flush logic a no-op. > + pmd = pmdp_huge_get_and_clear(mm, old_addr, old_pmd); > if (pmd_present(*old_pmd) && pmd_dirty(*old_pmd)) > force_flush = true; You need to be testing "pmd", not "*old_pmd". Because now "*old_pmd" will be zeroes. > if (pte_present(*old_pte) && pte_dirty(*old_pte)) > force_flush = true; Similarly here. You need to check "pte", not "*old_pte". Linus