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=-15.5 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 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 39BA2C4338F for ; Fri, 23 Jul 2021 01:58:28 +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 A6A1E60E9C for ; Fri, 23 Jul 2021 01:58:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A6A1E60E9C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:52208 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m6kSI-0004WY-RP for qemu-devel@archiver.kernel.org; Thu, 22 Jul 2021 21:58:26 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:40974) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m6kRJ-0003qx-T6 for qemu-devel@nongnu.org; Thu, 22 Jul 2021 21:57:25 -0400 Received: from szxga03-in.huawei.com ([45.249.212.189]:2196) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m6kRH-0006TB-A1 for qemu-devel@nongnu.org; Thu, 22 Jul 2021 21:57:25 -0400 Received: from dggemv704-chm.china.huawei.com (unknown [172.30.72.53]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4GWC4j6gclz7x8g; Fri, 23 Jul 2021 09:52:37 +0800 (CST) Received: from dggpemm500023.china.huawei.com (7.185.36.83) by dggemv704-chm.china.huawei.com (10.3.19.47) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Fri, 23 Jul 2021 09:57:15 +0800 Received: from [10.174.187.128] (10.174.187.128) by dggpemm500023.china.huawei.com (7.185.36.83) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2176.2; Fri, 23 Jul 2021 09:57:15 +0800 Subject: Re: [PATCH for-6.1 v2] machine: Disallow specifying topology parameters as zero To: Cleber Rosa References: <20210722154326.1464-1-wangyanan55@huawei.com> <20210722154326.1464-2-wangyanan55@huawei.com> <874kcm0ywx.fsf@p50.localhost.localdomain> From: "wangyanan (Y)" Message-ID: <38c23728-e2b4-cbd2-450f-ed4c95c7fba4@huawei.com> Date: Fri, 23 Jul 2021 09:57:14 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <874kcm0ywx.fsf@p50.localhost.localdomain> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Originating-IP: [10.174.187.128] X-ClientProxiedBy: dggeme718-chm.china.huawei.com (10.1.199.114) To dggpemm500023.china.huawei.com (7.185.36.83) X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.189; envelope-from=wangyanan55@huawei.com; helo=szxga03-in.huawei.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, NICE_REPLY_A=-0.203, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Andrew Jones , =?UTF-8?Q?Daniel_P_=2e_Berrang=c3=a9?= , Eduardo Habkost , Pierre Morel , Pankaj Gupta , Cornelia Huck , Markus Armbruster , qemu-devel@nongnu.org, wanghaibin.wang@huawei.com, yuzenghui@huawei.com, Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hi Cleber, On 2021/7/23 6:25, Cleber Rosa wrote: > Yanan Wang writes: > >> In the SMP configuration, we should either specify a topology >> parameter with a reasonable value (equal to or greater than 1) >> or just leave it omitted and QEMU will calculate its value. >> Configurations which explicitly specify the topology parameters >> as zero like "sockets=0" are meaningless, so disallow them. >> >> However, the commit 1e63fe685804d >> (machine: pass QAPI struct to mc->smp_parse) has documented that >> '0' has the same semantics as omitting a parameter in the qapi >> comment for SMPConfiguration. So this patch fixes the doc and >> also adds the corresponding sanity check in the smp parsers. >> >> Suggested-by: Andrew Jones >> Signed-off-by: Yanan Wang >> --- >> hw/core/machine.c | 14 ++++++++++++++ >> qapi/machine.json | 6 +++--- >> qemu-options.hx | 12 +++++++----- >> 3 files changed, 24 insertions(+), 8 deletions(-) > Hi Yanan, > > This looks somewhat similar to this very old patch of mine: > > https://mail.gnu.org/archive/html/qemu-devel/2020-10/msg03039.html > > I'm putting a reference here because I believe the test can be salvaged > and slightly adapted for this patch of yours. > > Let me know if I can help anyhow. > Thanks for this. I was introducing an unit test for the smp parsing in [1], in which all possible valid and invalid smp configs were covered, and actually the "parameter=0" stuff was also covered. You can have a look, and suggestions are welcome. I'm not sure we need two different tests for the same part. :) [1] https://lore.kernel.org/qemu-devel/20210719032043.25416-12-wangyanan55@huawei.com/ Thanks, Yanan .