From patchwork Thu Mar 27 00:38:16 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Min Chen X-Patchwork-Id: 3895941 Return-Path: X-Original-To: patchwork-ceph-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 113AFBF540 for ; Thu, 27 Mar 2014 00:44:51 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3717220218 for ; Thu, 27 Mar 2014 00:44:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C9FD02014A for ; Thu, 27 Mar 2014 00:44:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755288AbaC0Aor (ORCPT ); Wed, 26 Mar 2014 20:44:47 -0400 Received: from m59-178.qiye.163.com ([123.58.178.59]:55817 "EHLO m59-178.qiye.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753291AbaC0Aoq (ORCPT ); Wed, 26 Mar 2014 20:44:46 -0400 X-Greylist: delayed 373 seconds by postgrey-1.27 at vger.kernel.org; Wed, 26 Mar 2014 20:44:46 EDT Received: from localhost.localdomain (unknown [119.39.124.170]) by m59-178.qiye.163.com (HMail) with ESMTPA id F213814819FF; Thu, 27 Mar 2014 08:38:30 +0800 (CST) From: Min Chen To: ceph-devel@vger.kernel.org Cc: josh.durgin@inktank.com, Yunchuan Wen , Li Wang Subject: [PATCH 0/2] rbd: copy-on-read for clones, add an option for copy-on-read Date: Thu, 27 Mar 2014 08:38:16 +0800 Message-Id: <1395880698-20479-1-git-send-email-minchen@ubuntukylin.com> X-Mailer: git-send-email 1.7.10.4 X-HM-Spam-Status: e1koWUFPN1dZCBgUCR5ZQUhVQ0lCQkJCQklITEtNS05PTFdZCQ4XHghZQV koKz0kKzooKCQyNSQzPjo*PilBS1VLQDYjJCI#KCQyNSQzPjo*PilBS1VLQCsvKSQiPigkMjUkMz 46Pz4pQUtVS0A4NC41LykiJDg1QUtVS0ApPjwyNDUkOigyOkFLVUtAKyk0LTI1OD4kMy41OjVBS1 VLQD8iNTo2MjgkMiskNTQkMjUkMz46Pz4pQUtVS0A2LjcvMiQpOCsvJD8yPT0#KT41LyQyNSQzPj o*PilBSVVLQDIrJC80PzoiJDg1LyRLJEpLS0FLVUtAMiskTiQ2MjUuLz4kODUvJEskSktBS1VLQD IrJEokNjI1Li8#JDg1LyRLJEpLQUtVS0AyKyRKJDM0LikkODUvJEskSktLQUtVS0AyKyRISyQ2Mj UuLz4kODUvJEskTktBS1VLQCguOSQ#QUpVTk5APTUkKC45JD41LDQpPygkMzcxJEpLS0lLSkFLVU lDWQY+ X-HM-Sender-Digest: e1kSHx4VD1lBWUc6ORA6Nyo*Pzo0LjpLKj8yOjQuOjQwChVVSlVKSEJO Q0NLTEpKSUtCVTMWGhIXVRYSFRgTHhU7DhkOFQ8OEAIXEhVVGBQWRVlXWQweGVlBHRoXCB5XWQgB WUFJSE9DN1dZEgtZQVlKSkJVSEJVSklPVUpMS1kG Sender: ceph-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org X-Spam-Status: No, score=-7.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add an option rbd_clone_cor to enable copy-on-read Signed-off-by: Min Chen Signed-off-by: Yunchuan Wen Signed-off-by: Li Wang --- src/common/config_opts.h | 1 + src/librbd/AioRequest.cc | 1 + 2 files changed, 2 insertions(+) diff --git a/src/common/config_opts.h b/src/common/config_opts.h index 0d03809..99167b0 100644 --- a/src/common/config_opts.h +++ b/src/common/config_opts.h @@ -620,6 +620,7 @@ OPTION(rbd_cache_block_writes_upfront, OPT_BOOL, false) // whether to block writ OPTION(rbd_concurrent_management_ops, OPT_INT, 10) // how many operations can be in flight for a management operation like deleting or resizing an image OPTION(rbd_balance_snap_reads, OPT_BOOL, false) OPTION(rbd_localize_snap_reads, OPT_BOOL, false) +OPTION(rbd_clone_cor, OPT_BOOL, false)//copy-on-read option for rbd clones /* * The following options change the behavior for librbd's image creation methods that diff --git a/src/librbd/AioRequest.cc b/src/librbd/AioRequest.cc index 11e111f..e8fb657 100644 --- a/src/librbd/AioRequest.cc +++ b/src/librbd/AioRequest.cc @@ -59,6 +59,7 @@ namespace librbd { ldout(m_ictx->cct, 20) << "should_complete " << this << " " << m_oid << " " << m_object_off << "~" << m_object_len << " r = " << r << dendl; + bool COR = m_ictx->cct->_conf->rbd_clone_cor; if (!m_tried_parent && r == -ENOENT) { RWLock::RLocker l(m_ictx->snap_lock); RWLock::RLocker l2(m_ictx->parent_lock);