From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E495517BB4 for ; Wed, 24 Jul 2024 02:54:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.255 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721789661; cv=none; b=n5HLabX2ta2g/QIEmWSCDfI9izA6DYq109ofbDrzuQZ7z37F5JTAmyc2FnFi5RSOHIKxSe7w2GZdbV046ZjWHDmp31o5BwseMIfVQSEYKYAPVnlT4p5NWHxpkAuwvJGopMvkfqXR50D1PphL4FSzn5Iz+2xGOdoj3e0+ZYDWTFg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721789661; c=relaxed/simple; bh=Rnpab9ujaK/+HaPdbwGqfHdBdOS0Q+QraiGJcQaX49M=; h=Message-ID:Date:MIME-Version:Subject:To:CC:References:From: In-Reply-To:Content-Type; b=SRgOhwdrSwptAVXfZCWxtyQF05DSxjJDjnv4h/nlnIgL+W6GdxVN4ivvxkYFYL9ZkBg9U36fXuKdHHywIocYRh4grSd6dvl4axE3TS6GF6XosCtcQ+AUyerCvreXkJhdeQ2DhfuXO2hAsPSd29DNU3qpmlgsnPcN2frE8vTGdws= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.255 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.105]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4WTJWN5S7qz1L9Q2; Wed, 24 Jul 2024 10:54:08 +0800 (CST) Received: from dggpeml500022.china.huawei.com (unknown [7.185.36.66]) by mail.maildlp.com (Postfix) with ESMTPS id 6A3C014038F; Wed, 24 Jul 2024 10:54:10 +0800 (CST) Received: from [10.67.111.104] (10.67.111.104) by dggpeml500022.china.huawei.com (7.185.36.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Wed, 24 Jul 2024 10:54:10 +0800 Message-ID: <16363c16-9806-4e49-8a10-5620723fde05@huawei.com> Date: Wed, 24 Jul 2024 10:54:09 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: UML/hostfs - mount failure at tip of tree Content-Language: en-US To: =?UTF-8?Q?Maciej_=C5=BBenczykowski?= , Kernel hackers CC: Patrick Rohr , Linus Torvalds , Christian Brauner References: From: Hongbo Li In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To dggpeml500022.china.huawei.com (7.185.36.66) On 2024/7/24 6:33, Maciej Żenczykowski wrote: > mount: /host: special device hostfs does not exist. Hi, Maciej, Sorry to bother you. According to this output and the source code, I found the `src` is hostfs which seems like the fstype. Can you provide the mount command? Is it like "mount none /mnt/home -t hostfs -o /home" or embedded in the boot command"./linux xxx rootfstype=hostfs hostfs=.."? Thanks, Hongbo