From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751520AbdCRJwK (ORCPT ); Sat, 18 Mar 2017 05:52:10 -0400 Received: from terminus.zytor.com ([65.50.211.136]:55354 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751105AbdCRJwI (ORCPT ); Sat, 18 Mar 2017 05:52:08 -0400 Date: Sat, 18 Mar 2017 02:51:16 -0700 From: "tip-bot for Kirill A. Shutemov" Message-ID: Cc: dann.frazier@canonical.com, peterz@infradead.org, akpm@linux-foundation.org, bp@alien8.de, kirill.shutemov@linux.intel.com, torvalds@linux-foundation.org, tglx@linutronix.de, aarcange@redhat.com, aneesh.kumar@linux.vnet.ibm.com, riel@redhat.com, hpa@zytor.com, steve.capper@linaro.org, dave.hansen@intel.com, catalin.marinas@arm.com, mingo@kernel.org, linux-kernel@vger.kernel.org Reply-To: linux-kernel@vger.kernel.org, catalin.marinas@arm.com, mingo@kernel.org, dave.hansen@intel.com, hpa@zytor.com, steve.capper@linaro.org, riel@redhat.com, aarcange@redhat.com, aneesh.kumar@linux.vnet.ibm.com, tglx@linutronix.de, kirill.shutemov@linux.intel.com, torvalds@linux-foundation.org, bp@alien8.de, akpm@linux-foundation.org, peterz@infradead.org, dann.frazier@canonical.com In-Reply-To: <20170316152655.37789-5-kirill.shutemov@linux.intel.com> References: <20170316152655.37789-5-kirill.shutemov@linux.intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/mm] mm/gup: Mark all pages PageReferenced in generic get_user_pages_fast() Git-Commit-ID: e93480537fd7ecaf5ed1a662a979376f6fee50e3 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: e93480537fd7ecaf5ed1a662a979376f6fee50e3 Gitweb: http://git.kernel.org/tip/e93480537fd7ecaf5ed1a662a979376f6fee50e3 Author: Kirill A. Shutemov AuthorDate: Thu, 16 Mar 2017 18:26:52 +0300 Committer: Ingo Molnar CommitDate: Sat, 18 Mar 2017 09:48:02 +0100 mm/gup: Mark all pages PageReferenced in generic get_user_pages_fast() This is a preparation patch for the transition of x86 to the generic GUP_fast() implementation. Unlike generic GUP_fast(), the x86 version makes all pages it touches referenced. It seems required for GRU and EPT. See the following commit: 8ee53820edfd ("thp: mmu_notifier_test_young") Signed-off-by: Kirill A. Shutemov Cc: Andrea Arcangeli Cc: Andrew Morton Cc: Aneesh Kumar K . V Cc: Borislav Petkov Cc: Catalin Marinas Cc: Dann Frazier Cc: Dave Hansen Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Rik van Riel Cc: Steve Capper Cc: Thomas Gleixner Cc: linux-arch@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20170316152655.37789-5-kirill.shutemov@linux.intel.com Signed-off-by: Ingo Molnar --- mm/gup.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/mm/gup.c b/mm/gup.c index e83db38..2b6cd357 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; }