From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754301AbcLTWXz (ORCPT ); Tue, 20 Dec 2016 17:23:55 -0500 Received: from mga09.intel.com ([134.134.136.24]:54921 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752328AbcLTWXv (ORCPT ); Tue, 20 Dec 2016 17:23:51 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,380,1477983600"; d="scan'208";a="45107566" From: Ross Zwisler To: linux-kernel@vger.kernel.org Cc: Ross Zwisler , Alexander Viro , Andrew Morton , Christoph Hellwig , Dan Williams , Dave Chinner , Dave Hansen , Jan Kara , Matthew Wilcox , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-nvdimm@ml01.01.org Subject: [PATCH 0/2] Write protect DAX PMDs in *sync path Date: Tue, 20 Dec 2016 15:23:04 -0700 Message-Id: <1482272586-21177-1-git-send-email-ross.zwisler@linux.intel.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently dax_mapping_entry_mkclean() fails to clean and write protect the pmd_t of a DAX PMD entry during an *sync operation. This can result in data loss, as detailed in patch 2. This series is based on Dan's "libnvdimm-pending" branch, which is the current home for Jan's "dax: Page invalidation fixes" series. You can find a working tree here: https://git.kernel.org/cgit/linux/kernel/git/zwisler/linux.git/log/?h=dax_pmd_clean Ross Zwisler (2): mm: add follow_pte_pmd() dax: wrprotect pmd_t in dax_mapping_entry_mkclean fs/dax.c | 51 ++++++++++++++++++++++++++++++++++++--------------- include/linux/mm.h | 4 ++-- mm/memory.c | 41 ++++++++++++++++++++++++++++++++--------- 3 files changed, 70 insertions(+), 26 deletions(-) -- 2.7.4