Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965734AbcDLSNT (ORCPT ); Tue, 12 Apr 2016 14:13:19 -0400 Received: from g1t6220.austin.hp.com ([15.73.96.84]:54859 "EHLO g1t6220.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933476AbcDLSNR (ORCPT ); Tue, 12 Apr 2016 14:13:17 -0400 From: Waiman Long To: "Theodore Ts'o" , Andreas Dilger Cc: linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, Tejun Heo , Christoph Lameter , Scott J Norton , Douglas Hatch , Toshimitsu Kani , Waiman Long Subject: [PATCH v3 0/2] ext4: Improve parallel I/O performance on NVDIMM Date: Tue, 12 Apr 2016 14:12:53 -0400 Message-Id: <1460484775-33359-1-git-send-email-Waiman.Long@hpe.com> X-Mailer: git-send-email 1.7.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1112 Lines: 31 v2->v3: - Remove the percpu_stats helper functions and use percpu_counters instead. v1->v2: - Remove percpu_stats_reset() which is not really needed in this patchset. - Move some percpu_stats* functions to the newly created lib/percpu_stats.c. - Add a new patch to support 64-bit statistics counts in 32-bit architectures. - Rearrange the patches by moving the percpu_stats patches to the front followed by the ext4 patches. This patchset aims to improve parallel I/O performance of the ext4 filesystem on fast storage devices like NVDIMM. Patch 1 eliminates duplicated inode_dio_begin()/inode_dio_end() calls. Patch 2 converts some ext4 statistics counts into percpu counts using the helper functions. Waiman Long (2): ext4: Pass in DIO_SKIP_DIO_COUNT flag if inode_dio_begin() called ext4: Make cache hits/misses per-cpu counts fs/ext4/extents_status.c | 38 +++++++++++++++++++++++++++++--------- fs/ext4/extents_status.h | 4 ++-- fs/ext4/indirect.c | 10 ++++++++-- fs/ext4/inode.c | 12 +++++++++--- 4 files changed, 48 insertions(+), 16 deletions(-)