Hi Greg, On Thu, Nov 05, 2015 at 04:29:48PM -0800, [email protected] wrote: > > The patch below does not apply to the 4.2-stable tree. > If someone wants it applied there, or to any other stable or longterm > tree, then please email the backport, including the original git commit > id to <[email protected]>.
This is backport patch for v4.2.5. If something is wrong(e.g. process, description and so on), let me know it. Thanks. >From 6db5ccd1e927fc1181ea849ca73f089608071ed9 Mon Sep 17 00:00:00 2001 From: Minchan Kim <[email protected]> Date: Fri, 6 Nov 2015 11:11:08 +0900 Subject: [PATCH] thp: use is_zero_pfn() only after pte_present() check This is backport for v4.2.5 Original commit id is 47aee4d8e314384807e98b67ade07f6da476aa75 Signed-off-by: Minchan Kim <[email protected]> --- mm/huge_memory.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 097c7a4..da0ac6a 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2132,7 +2132,8 @@ static int __collapse_huge_page_isolate(struct vm_area_struct *vma, for (_pte = pte; _pte < pte+HPAGE_PMD_NR; _pte++, address += PAGE_SIZE) { pte_t pteval = *_pte; - if (pte_none(pteval) || is_zero_pfn(pte_pfn(pteval))) { + if (pte_none(pteval) || (pte_present(pteval) && + is_zero_pfn(pte_pfn(pteval)))) { if (++none_or_zero <= khugepaged_max_ptes_none) continue; else -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
