From nobody Fri Apr 26 07:26:08 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1679126015199113.89049582811879; Sat, 18 Mar 2023 00:53:35 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pdRMa-0006mg-Cd; Sat, 18 Mar 2023 03:52:28 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pdRMR-0006jp-BU; Sat, 18 Mar 2023 03:52:19 -0400 Received: from isrv.corpit.ru ([86.62.121.231]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pdRMP-0003rS-Jc; Sat, 18 Mar 2023 03:52:19 -0400 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 57934401B4; Sat, 18 Mar 2023 10:52:03 +0300 (MSK) Received: from tls.msk.ru (mjt.wg.tls.msk.ru [192.168.177.130]) by tsrv.corpit.ru (Postfix) with SMTP id C654C123; Sat, 18 Mar 2023 10:52:02 +0300 (MSK) Received: (nullmailer pid 97899 invoked by uid 1000); Sat, 18 Mar 2023 07:52:02 -0000 From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, stefanha@redhat.com, Michael Tokarev Subject: [PATCH] doc: do not recommend -blockdev Date: Sat, 18 Mar 2023 10:51:59 +0300 Message-Id: <20230318075159.97849-1-mjt@msgid.tls.msk.ru> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=86.62.121.231; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1679126019775100001 Content-Type: text/plain; charset="utf-8" Currently, documentation recommends to use -blockdev instead of -drive. This is quite a bit misleading, because -blockdev is "too" low-level, requires good knowlege of how to construct block device stack, esp. in context of various qcow2 layers, and requires too explicit configuration. More, quite some constructs does not work with -blockdev, - for example this is -snapshot. Instead of "recommended" word, use another construct here. Signed-off-by: Michael Tokarev --- qemu-options.hx | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/qemu-options.hx b/qemu-options.hx index 59bdf67a2c..8fe31b465d 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -1143,7 +1143,7 @@ have gone through several iterations as the feature s= et and complexity of the block layer have grown. Many online guides to QEMU often reference older and deprecated options, which can lead to confusion. =20 -The recommended modern way to describe disks is to use a combination of +The low-level detailed way to describe disks is to use a combination of ``-device`` to specify the hardware device and ``-blockdev`` to describe the backend. The device defines what the guest sees and the backend describes how QEMU handles the data. --=20 2.30.2