From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f70.google.com (mail-pg0-f70.google.com [74.125.83.70]) by kanga.kvack.org (Postfix) with ESMTP id DFDEC6B038C for ; Thu, 16 Mar 2017 11:27:42 -0400 (EDT) Received: by mail-pg0-f70.google.com with SMTP id g2so96791229pge.7 for ; Thu, 16 Mar 2017 08:27:42 -0700 (PDT) Received: from mga14.intel.com (mga14.intel.com. [192.55.52.115]) by mx.google.com with ESMTPS id m188si4004009pfc.145.2017.03.16.08.27.41 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 16 Mar 2017 08:27:41 -0700 (PDT) From: "Kirill A. Shutemov" Subject: [PATCH 4/7] mm/gup: Make pages referenced during generic get_user_pages_fast() Date: Thu, 16 Mar 2017 18:26:52 +0300 Message-Id: <20170316152655.37789-5-kirill.shutemov@linux.intel.com> In-Reply-To: <20170316152655.37789-1-kirill.shutemov@linux.intel.com> References: <20170316152655.37789-1-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Linus Torvalds , Andrew Morton , x86@kernel.org, Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" Cc: Dave Hansen , "Aneesh Kumar K . V" , Steve Capper , Dann Frazier , Catalin Marinas , linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" , Andrea Arcangeli This is preparation patch for transition of x86 to generic GUP_fast() implementation. Unlike generic GUP_fast(), x86 version makes all pages it touches referenced. It seems required for GRU and EPT. See commit 8ee53820edfd ("thp: mmu_notifier_test_young"). Signed-off-by: Kirill A. Shutemov Cc: Andrea Arcangeli --- mm/gup.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/mm/gup.c b/mm/gup.c index ed2259dc4606..f0cfe225c08f 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -1238,6 +1238,8 @@ static int gup_pte_range(pmd_t pmd, unsigned long addr, unsigned long end, } VM_BUG_ON_PAGE(compound_head(page) != head, page); + + SetPageReferenced(page); pages[*nr] = page; (*nr)++; @@ -1299,6 +1301,7 @@ static int gup_huge_pmd(pmd_t orig, pmd_t *pmdp, unsigned long addr, return 0; } + SetPageReferenced(head); return 1; } @@ -1334,6 +1337,7 @@ static int gup_huge_pud(pud_t orig, pud_t *pudp, unsigned long addr, return 0; } + SetPageReferenced(head); return 1; } @@ -1370,6 +1374,7 @@ static int gup_huge_pgd(pgd_t orig, pgd_t *pgdp, unsigned long addr, return 0; } + SetPageReferenced(head); return 1; } -- 2.11.0 -- 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