From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f174.google.com (mail-pd0-f174.google.com [209.85.192.174]) by kanga.kvack.org (Postfix) with ESMTP id 230CB6B006E for ; Tue, 2 Dec 2014 03:38:09 -0500 (EST) Received: by mail-pd0-f174.google.com with SMTP id w10so12750872pde.33 for ; Tue, 02 Dec 2014 00:38:08 -0800 (PST) Received: from tyo200.gate.nec.co.jp (TYO200.gate.nec.co.jp. [210.143.35.50]) by mx.google.com with ESMTPS id d13si32428117pdk.227.2014.12.02.00.38.04 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Tue, 02 Dec 2014 00:38:06 -0800 (PST) Received: from tyo202.gate.nec.co.jp ([10.7.69.202]) by tyo200.gate.nec.co.jp (8.13.8/8.13.4) with ESMTP id sB28c0qQ026757 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 2 Dec 2014 17:38:02 +0900 (JST) From: Naoya Horiguchi Subject: [PATCH 0/8] hugepage migration fixes (v5) Date: Tue, 2 Dec 2014 08:26:38 +0000 Message-ID: <1417508759-10848-1-git-send-email-n-horiguchi@ah.jp.nec.com> Content-Language: ja-JP Content-Type: text/plain; charset="iso-2022-jp" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton , Hugh Dickins Cc: David Rientjes , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Naoya Horiguchi Hi everyone, This is ver.5 patchset for fixing hugepage migration's race problem. In ver.4, Hugh enlighted me about the problem around pmd_huge(), where pmd_huge() returned false for migration/hwpoison entry and we treated them as normal pages. IOW, we didn't handle !pmd_present case properly. So I added a new separate patch for this problem as patch 2/8, and I change= d patch "mm/hugetlb: take page table lock in follow_huge_pmd()" (3/8 in this series) to handle non-present hugetlb case in follow_huge_pmd(). Other than that, changes in this version are minor ones like comment fix. Can I beg your comments and reviews again? Thanks, Naoya Horiguchi --- Tree: git@github.com:Naoya-Horiguchi/linux.git Branch: mmotm-2014-11-26-15-45/fix_hugetlbfs_follow_page.v5 v2: http://thread.gmane.org/gmane.linux.kernel/1761065 v3: http://thread.gmane.org/gmane.linux.kernel/1776585 v4: http://thread.gmane.org/gmane.linux.kernel/1788215 --- Summary: Naoya Horiguchi (8): mm/hugetlb: reduce arch dependent code around follow_huge_* mm/hugetlb: pmd_huge() returns true for non-present hugepage mm/hugetlb: take page table lock in follow_huge_pmd() mm/hugetlb: fix getting refcount 0 page in hugetlb_fault() mm/hugetlb: add migration/hwpoisoned entry check in hugetlb_change_pr= otection mm/hugetlb: add migration entry check in __unmap_hugepage_range mm/hugetlb: fix suboptimal migration/hwpoisoned entry check mm/hugetlb: cleanup and rename is_hugetlb_entry_(migration|hwpoisoned= )() arch/arm/mm/hugetlbpage.c | 6 -- arch/arm64/mm/hugetlbpage.c | 6 -- arch/ia64/mm/hugetlbpage.c | 6 -- arch/metag/mm/hugetlbpage.c | 6 -- arch/mips/mm/hugetlbpage.c | 18 ---- arch/powerpc/mm/hugetlbpage.c | 8 ++ arch/s390/mm/hugetlbpage.c | 20 ----- arch/sh/mm/hugetlbpage.c | 12 --- arch/sparc/mm/hugetlbpage.c | 12 --- arch/tile/mm/hugetlbpage.c | 28 ------ arch/x86/mm/gup.c | 2 +- arch/x86/mm/hugetlbpage.c | 20 ++--- include/linux/hugetlb.h | 8 +- include/linux/swapops.h | 4 + mm/gup.c | 25 ++---- mm/hugetlb.c | 196 ++++++++++++++++++++++++++------------= ---- mm/migrate.c | 5 +- 17 files changed, 156 insertions(+), 226 deletions(-)= -- 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