From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f45.google.com (mail-pa0-f45.google.com [209.85.220.45]) by kanga.kvack.org (Postfix) with ESMTP id BD2DB6B0256 for ; Tue, 6 Oct 2015 18:28:56 -0400 (EDT) Received: by pacfv12 with SMTP id fv12so226857586pac.2 for ; Tue, 06 Oct 2015 15:28:56 -0700 (PDT) Received: from mga01.intel.com (mga01.intel.com. [192.55.52.88]) by mx.google.com with ESMTP id yk2si52218071pac.192.2015.10.06.15.28.55 for ; Tue, 06 Oct 2015 15:28:55 -0700 (PDT) From: Ross Zwisler Subject: [PATCH v4 0/2] Revert locking changes in DAX for v4.3 Date: Tue, 6 Oct 2015 16:28:47 -0600 Message-Id: <1444170529-12814-1-git-send-email-ross.zwisler@linux.intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org Cc: Ross Zwisler , Alexander Viro , Matthew Wilcox , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Andrew Morton , Dan Williams , Dave Chinner , Jan Kara , "Kirill A. Shutemov" , linux-nvdimm@lists.01.org, Matthew Wilcox This series reverts some recent changes to the locking scheme in DAX introduced by these two commits: commit 843172978bb9 ("dax: fix race between simultaneous faults") commit 46c043ede471 ("mm: take i_mmap_lock in unmap_mapping_range() for DAX") Changes from v3: - reduced the revert of 46c043ede471 in patch 1 so that we still drop the mapping->i_mmap_rwsem before calling unmap_mapping_range(). This prevents the deadlock in the __dax_pmd_fault() path so there is no longer a need to temporarily disable DAX PMD faults. Ross Zwisler (2): Revert "mm: take i_mmap_lock in unmap_mapping_range() for DAX" Revert "dax: fix race between simultaneous faults" fs/dax.c | 70 +++++++++++++++++++++++++------------------------------------ mm/memory.c | 2 ++ 2 files changed, 31 insertions(+), 41 deletions(-) -- 2.1.0 -- 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