From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E410AC4CEC4 for ; Wed, 18 Sep 2019 09:24:38 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BA7CB214AF for ; Wed, 18 Sep 2019 09:24:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BA7CB214AF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=ispras.ru Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:56428 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iAWCT-0001dh-Sy for qemu-devel@archiver.kernel.org; Wed, 18 Sep 2019 05:24:37 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:55660) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iAWAa-0000Hd-Ax for qemu-devel@nongnu.org; Wed, 18 Sep 2019 05:22:41 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iAWAZ-0006Jo-1r for qemu-devel@nongnu.org; Wed, 18 Sep 2019 05:22:40 -0400 Received: from mail.ispras.ru ([83.149.199.45]:55034) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1iAWAY-0006HM-My for qemu-devel@nongnu.org; Wed, 18 Sep 2019 05:22:39 -0400 Received: from PASHAISP (unknown [85.142.117.226]) by mail.ispras.ru (Postfix) with ESMTPSA id 5D15854015D; Wed, 18 Sep 2019 12:22:35 +0300 (MSK) From: "Pavel Dovgalyuk" To: "'Kevin Wolf'" , "'Pavel Dovgalyuk'" References: <156872146565.1757.3033215873677512474.stgit@pasha-Precision-3630-Tower> <156872148244.1757.2888672921697745021.stgit@pasha-Precision-3630-Tower> <20190918091831.GD5207@localhost.localdomain> In-Reply-To: <20190918091831.GD5207@localhost.localdomain> Date: Wed, 18 Sep 2019 12:22:38 +0300 Message-ID: <001201d56e02$9d88b5f0$d89a21d0$@ru> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AdVuAhGBSLIt3dTuSbKdDg3TtxJgXwAADKug Content-Language: ru X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 83.149.199.45 Subject: Re: [Qemu-devel] [for-4.2 PATCH 3/6] replay: update docs for record/replay with block devices X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, pavel.dovgaluk@ispras.ru, quintela@redhat.com, ciro.santilli@gmail.com, jasowang@redhat.com, crosthwaite.peter@gmail.com, qemu-devel@nongnu.org, armbru@redhat.com, alex.bennee@linaro.org, maria.klimushenkova@ispras.ru, mst@redhat.com, kraxel@redhat.com, boost.lists@gmail.com, thomas.dullien@googlemail.com, pbonzini@redhat.com, mreitz@redhat.com, artem.k.pisarenko@gmail.com, dgilbert@redhat.com, rth@twiddle.net Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" > From: Kevin Wolf [mailto:kwolf@redhat.com] > Am 17.09.2019 um 13:58 hat Pavel Dovgalyuk geschrieben: > > From: Pavel Dovgalyuk > > > > This patch updates the description of the command lines for using > > record/replay with attached block devices. > > > > Signed-off-by: Pavel Dovgalyuk > > --- > > docs/replay.txt | 12 +++++++++--- > > 1 file changed, 9 insertions(+), 3 deletions(-) > > > > diff --git a/docs/replay.txt b/docs/replay.txt > > index ee6aee9861..ce97c3f72f 100644 > > --- a/docs/replay.txt > > +++ b/docs/replay.txt > > @@ -27,7 +27,7 @@ Usage of the record/replay: > > * First, record the execution with the following command line: > > qemu-system-i386 \ > > -icount shift=7,rr=record,rrfile=replay.bin \ > > - -drive file=disk.qcow2,if=none,id=img-direct \ > > + -drive file=disk.qcow2,if=none,snapshot,id=img-direct \ > > -drive driver=blkreplay,if=none,image=img-direct,id=img-blkreplay \ > > -device ide-hd,drive=img-blkreplay \ > > -netdev user,id=net1 -device rtl8139,netdev=net1 \ > > @@ -35,7 +35,7 @@ Usage of the record/replay: > > * After recording, you can replay it by using another command line: > > qemu-system-i386 \ > > -icount shift=7,rr=replay,rrfile=replay.bin \ > > - -drive file=disk.qcow2,if=none,id=img-direct \ > > + -drive file=disk.qcow2,if=none,snapshot,id=img-direct \ > > -drive driver=blkreplay,if=none,image=img-direct,id=img-blkreplay \ > > -device ide-hd,drive=img-blkreplay \ > > -netdev user,id=net1 -device rtl8139,netdev=net1 \ > > @@ -223,7 +223,7 @@ Block devices record/replay module intercepts calls of > > bdrv coroutine functions at the top of block drivers stack. > > To record and replay block operations the drive must be configured > > as following: > > - -drive file=disk.qcow2,if=none,id=img-direct > > + -drive file=disk.qcow2,if=none,snapshot,id=img-direct > > -drive driver=blkreplay,if=none,image=img-direct,id=img-blkreplay > > -device ide-hd,drive=img-blkreplay > > > > @@ -252,6 +252,12 @@ This snapshot is created at start of recording and restored at start > > of replaying. It also can be loaded while replaying to roll back > > the execution. > > > > +'snapshot' flag of the disk image must be removed to save the snapshots > > +in the overlay (or original image) instead of using the temporary overlay. > > + -drive file=disk.ovl,if=none,id=img-direct > > + -drive driver=blkreplay,if=none,image=img-direct,id=img-blkreplay > > + -device ide-hd,drive=img-blkreplay > > Wait, didn't patch 2 just make -snapshot unconditionally incompatible > with replay? So isn't saving the snapshot in the original image the only > supported mode now? There are two ways to run record/replay: 1. Disk with snapshot option and any image to make it unchanged 2. Disk with overlay without snapshot option to save VM snapshots on it Pavel Dovgalyuk