From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f47.google.com (mail-pa0-f47.google.com [209.85.220.47]) by kanga.kvack.org (Postfix) with ESMTP id AA8979003CD for ; Thu, 3 Sep 2015 11:20:35 -0400 (EDT) Received: by padfa1 with SMTP id fa1so7330530pad.1 for ; Thu, 03 Sep 2015 08:20:35 -0700 (PDT) Received: from mga09.intel.com (mga09.intel.com. [134.134.136.24]) by mx.google.com with ESMTP id ry8si41888265pbb.86.2015.09.03.08.14.05 for ; Thu, 03 Sep 2015 08:14:05 -0700 (PDT) From: "Kirill A. Shutemov" Subject: [PATCHv10 28/36] mm, numa: skip PTE-mapped THP on numa fault Date: Thu, 3 Sep 2015 18:13:14 +0300 Message-Id: <1441293202-137314-29-git-send-email-kirill.shutemov@linux.intel.com> In-Reply-To: <1441293202-137314-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1441293202-137314-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton , Andrea Arcangeli , Hugh Dickins Cc: Dave Hansen , Mel Gorman , Rik van Riel , Vlastimil Babka , Christoph Lameter , Naoya Horiguchi , Steve Capper , "Aneesh Kumar K.V" , Johannes Weiner , Michal Hocko , Jerome Marchand , Sasha Levin , linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Kirill A. Shutemov" We're going to have THP mapped with PTEs. It will confuse numabalancing. Let's skip them for now. Signed-off-by: Kirill A. Shutemov Tested-by: Sasha Levin Tested-by: Aneesh Kumar K.V Acked-by: Jerome Marchand --- mm/memory.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/mm/memory.c b/mm/memory.c index e42de24690af..5a9e9399d935 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3184,6 +3184,12 @@ static int do_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, return 0; } + /* TODO: handle PTE-mapped THP */ + if (PageCompound(page)) { + pte_unmap_unlock(ptep, ptl); + return 0; + } + /* * Avoid grouping on RO pages in general. RO pages shouldn't hurt as * much anyway since they can be in shared cache state. This misses -- 2.5.0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org