From patchwork Wed May 4 05:57:29 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 9010071 X-Patchwork-Delegate: snitzer@redhat.com Return-Path: X-Original-To: patchwork-dm-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id DA984BF29F for ; Wed, 4 May 2016 06:02:29 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 90564202EC for ; Wed, 4 May 2016 06:02:28 +0000 (UTC) Received: from mx3-phx2.redhat.com (mx3-phx2.redhat.com [209.132.183.24]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9F3932027D for ; Wed, 4 May 2016 06:02:27 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by mx3-phx2.redhat.com (8.13.8/8.13.8) with ESMTP id u445whQd009165; Wed, 4 May 2016 01:58:43 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id u445vplr006201 for ; Wed, 4 May 2016 01:57:51 -0400 Received: from mx1.redhat.com (ext-mx10.extmail.prod.ext.phx2.redhat.com [10.5.110.39]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u445vpAL004502 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Wed, 4 May 2016 01:57:51 -0400 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id C75C264390; Wed, 4 May 2016 05:57:42 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id EA8EEAD91; Wed, 4 May 2016 05:57:31 +0000 (UTC) From: Hannes Reinecke To: Christophe Varoqui Date: Wed, 4 May 2016 07:57:29 +0200 Message-Id: <1462341450-5507-6-git-send-email-hare@suse.de> In-Reply-To: <1462341450-5507-1-git-send-email-hare@suse.de> References: <1462341450-5507-1-git-send-email-hare@suse.de> X-Greylist: Sender IP whitelisted by DNSRBL, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Wed, 04 May 2016 05:57:42 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Wed, 04 May 2016 05:57:42 +0000 (UTC) for IP:'195.135.220.15' DOMAIN:'mx2.suse.de' HELO:'mx2.suse.de' FROM:'hare@suse.de' RCPT:'' X-RedHat-Spam-Score: -3.98 (BAYES_50, DCC_REPUT_00_12, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, SPF_PASS) 195.135.220.15 mx2.suse.de 195.135.220.15 mx2.suse.de X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Scanned-By: MIMEDefang 2.78 on 10.5.110.39 X-loop: dm-devel@redhat.com Cc: dm-devel@redhat.com Subject: [dm-devel] [PATCH 5/6] devmapper: do not flush I/O for DM_DEVICE_CREATE X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Spam-Status: No, score=-9.0 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 DM_DEVICE_CREATE loads a new table, so there cannot be any I/O pending. Hence we should be setting the 'no flush' and 'skip lockfs' flag to avoid delays during creation. Signed-off-by: Hannes Reinecke --- libmultipath/devmapper.c | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-) diff --git a/libmultipath/devmapper.c b/libmultipath/devmapper.c index 04dcb72..0ae72fc 100644 --- a/libmultipath/devmapper.c +++ b/libmultipath/devmapper.c @@ -294,16 +294,23 @@ dm_addmap (int task, const char *target, struct multipath *mpp, if (ro) dm_task_set_ro(dmt); - if ((task == DM_DEVICE_CREATE) && strlen(mpp->wwid) > 0){ - prefixed_uuid = MALLOC(UUID_PREFIX_LEN + strlen(mpp->wwid) + 1); - if (!prefixed_uuid) { - condlog(0, "cannot create prefixed uuid : %s", - strerror(errno)); - goto addout; + if (task == DM_DEVICE_CREATE) { + if (strlen(mpp->wwid) > 0) { + prefixed_uuid = MALLOC(UUID_PREFIX_LEN + + strlen(mpp->wwid) + 1); + if (!prefixed_uuid) { + condlog(0, "cannot create prefixed uuid : %s", + strerror(errno)); + goto addout; + } + sprintf(prefixed_uuid, UUID_PREFIX "%s", mpp->wwid); + if (!dm_task_set_uuid(dmt, prefixed_uuid)) + goto freeout; } - sprintf(prefixed_uuid, UUID_PREFIX "%s", mpp->wwid); - if (!dm_task_set_uuid(dmt, prefixed_uuid)) - goto freeout; + dm_task_skip_lockfs(dmt); +#ifdef LIBDM_API_FLUSH + dm_task_no_flush(dmt); +#endif } if (mpp->attribute_flags & (1 << ATTR_MODE) &&