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=-8.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 63561C47E48 for ; Thu, 15 Jul 2021 11:22:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 48FC961278 for ; Thu, 15 Jul 2021 11:22:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241902AbhGOLZW (ORCPT ); Thu, 15 Jul 2021 07:25:22 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:57435 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240366AbhGOLZT (ORCPT ); Thu, 15 Jul 2021 07:25:19 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1626348146; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=n3XMjsLqmL6fZAAA+JBtyt58Zb9isCAphRrAoufbmyY=; b=gGqXWSAqUdtKoN5RqiXiSDJUUylntgAneUf/dCPJRUcfVFBGKTyeYzC+KF+S5ICn2Uxv71 wW6MXE/U+n4CJ/OJyy6NLmGm0TtR5TyvIWkBCXTS7j5zbIEj70iSxQQkRFH0pdRTmFgWnb HdIjhrOEZoNnoHrcpO8QW9cFSpP4kmM= Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-106-g15W2eraOPmTred8Oe4y2w-1; Thu, 15 Jul 2021 07:22:25 -0400 X-MC-Unique: g15W2eraOPmTred8Oe4y2w-1 Received: by mail-wr1-f71.google.com with SMTP id k3-20020a5d52430000b0290138092aea94so3161781wrc.20 for ; Thu, 15 Jul 2021 04:22:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=n3XMjsLqmL6fZAAA+JBtyt58Zb9isCAphRrAoufbmyY=; b=XkAKaSedWsapG4N+GKFREfNG4bdvYNNw/CvGanotZWoY/e/Z069qRJkdqcPwGyOWHX 4THqEs1IiqVhXdcBHezXcsPz1QFlNfL9msIfefewvI1U8QEu0bltLoknKdL6RsKovD3B ACGdBwtIZMvdhyGKM0w2CV8/5ITpSBa0RtXfifZwFbVDDTQNikH4YfvOPMSC2frtpc0s mMKgwImYzCGrd2IIOtcrvg5GBDeI/SA+k0e5Sea+EWRt+Er0caEx7ybtlVwukjVvmXw7 Prs0OenjnhilsXppRdjy08yIn3VImaYnzHTx/Rd96vfUE9SYEHnNTKqVp+p5m6iublM+ 3x9Q== X-Gm-Message-State: AOAM5320weunSwJsNjze0DTqgalTlcV5lMMoM+lPZMW+HvvTZXqyeCL6 5Po9NWvI1Dlz9yfBbDnwYS7tjsq7v791o/8YiNqjRUof+2GG8Dj2icyxuUXiz3kHSLrQoMbTn2d NS4XJ4CtzLA5oraV1ELmH5CqV13OdJeG4fi+TXOK/9onRXP1H1VhLJkZHxrQCf3XE/+hitQLiqI 0A X-Received: by 2002:a5d:52d0:: with SMTP id r16mr4822770wrv.323.1626348143956; Thu, 15 Jul 2021 04:22:23 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxxUBHhfe+A3WtzBYo5eZtyU+fS1EBqnOvDIUROVv21BrPU/0Ixxe0AbzLRTePqxWt25P3MgA== X-Received: by 2002:a5d:52d0:: with SMTP id r16mr4822740wrv.323.1626348143761; Thu, 15 Jul 2021 04:22:23 -0700 (PDT) Received: from ?IPv6:2001:b07:add:ec09:c399:bc87:7b6c:fb2a? ([2001:b07:add:ec09:c399:bc87:7b6c:fb2a]) by smtp.gmail.com with ESMTPSA id w15sm8708936wmi.3.2021.07.15.04.22.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 15 Jul 2021 04:22:22 -0700 (PDT) Subject: Re: [PATCH 1/1] virtio: disable partitions scanning for no partitions block To: Yury Kamenev , mst@redhat.com, jasowang@redhat.com, stefanha@redhat.com, axboe@kernel.dk, hch@lst.de, cand@gmx.com, virtualization@lists.linux-foundation.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org References: <20210715094707.19997-1-damtev@yandex-team.ru> <20210715094707.19997-2-damtev@yandex-team.ru> From: Paolo Bonzini Message-ID: <9bd3c75a-63b3-427c-c54c-cd12587ba58b@redhat.com> Date: Thu, 15 Jul 2021 13:22:16 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <20210715094707.19997-2-damtev@yandex-team.ru> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 15/07/21 11:47, Yury Kamenev wrote: > +#ifdef CONFIG_VIRTIO_BLK_NO_PART_SCAN > + if (unlikely(partitions_scanning_disable)) > + /* disable partitions scanning if it was stated in virtio features*/ > + if (virtio_has_feature(vdev, VIRTIO_BLK_F_NO_PART_SCAN)) > + vblk->disk->flags |= GENHD_FL_NO_PART_SCAN; > +#endif > + Has this been added to the spec? It doesn't seem like a good idea, as pointed out by Stefan[1], Christoph[2] and myself[3]. Paolo [1] https://lore.kernel.org/linux-block/20210524145654.GA2632@lst.de/T/#m2697cb41578490aad49ed1d8fa6604bf0924b54d [2] https://lore.kernel.org/linux-block/20210524145654.GA2632@lst.de/T/#mc59329fd824102f94ac2f6b29fe94a652849aca0 [3] https://lore.kernel.org/linux-block/20210524145654.GA2632@lst.de/T/#mee6787c4fd87790b64feccc9e77fd5f618c2c336