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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 789A6C4332F for ; Wed, 1 Nov 2023 14:17:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344275AbjKAORL (ORCPT ); Wed, 1 Nov 2023 10:17:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46460 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232094AbjKAORJ (ORCPT ); Wed, 1 Nov 2023 10:17:09 -0400 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B067DDC for ; Wed, 1 Nov 2023 07:17:03 -0700 (PDT) Received: from pps.filterd (m0353725.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3A1DogJC017255; Wed, 1 Nov 2023 14:16:42 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=message-id : date : subject : to : cc : references : from : in-reply-to : content-type : content-transfer-encoding : mime-version; s=pp1; bh=ZyizBjyFMUtcrQ74hLgTVrIM1r22WuWkds2VME0f4N0=; b=Hjb6bA+wY12WJkd6GlQ3M+XU7PvegPWrHedjMzldzep6MrOerKfnoaFKIfknN7q1jH6o 0oWKmrh0NVHTjZaTVNOLNGc+LyzZC7CnlxJD/fIYQFuPchxt4BjMXZgA0760pSiLIlyc IuVg40k5S7+JQcl+2lqm/owbfrkA3QUYrIAaJNq3zc3Qa8tLyLh6U/phTds7/TzSOBaT gYeuvW/JCUuKCYa0yo8ASMNgBxPyJWU2FQJ+DfN5WSKUwI+h8siNiDw/7nHPimTQ3ul3 lFMH5/b+qAq0kBr/39lNeEoqbwcbkrSNdXYZyIhoAgVhVx8UuikMuXzQzJ2MDZHR7nxV yQ== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3u3qwq8snq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 01 Nov 2023 14:16:42 +0000 Received: from m0353725.ppops.net (m0353725.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3A1EGfxK021145; Wed, 1 Nov 2023 14:16:41 GMT Received: from ppma11.dal12v.mail.ibm.com (db.9e.1632.ip4.static.sl-reverse.com [50.22.158.219]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3u3qwq8snd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 01 Nov 2023 14:16:41 +0000 Received: from pps.filterd (ppma11.dal12v.mail.ibm.com [127.0.0.1]) by ppma11.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3A1C36H3031499; Wed, 1 Nov 2023 14:16:40 GMT Received: from smtprelay04.wdc07v.mail.ibm.com ([172.16.1.71]) by ppma11.dal12v.mail.ibm.com (PPS) with ESMTPS id 3u1fb27hek-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 01 Nov 2023 14:16:40 +0000 Received: from smtpav05.wdc07v.mail.ibm.com (smtpav05.wdc07v.mail.ibm.com [10.39.53.232]) by smtprelay04.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 3A1EGdwv49873196 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 1 Nov 2023 14:16:40 GMT Received: from smtpav05.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DA48558053; Wed, 1 Nov 2023 14:16:39 +0000 (GMT) Received: from smtpav05.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D0E3458059; Wed, 1 Nov 2023 14:16:38 +0000 (GMT) Received: from [9.47.158.152] (unknown [9.47.158.152]) by smtpav05.wdc07v.mail.ibm.com (Postfix) with ESMTPS; Wed, 1 Nov 2023 14:16:38 +0000 (GMT) Message-ID: Date: Wed, 1 Nov 2023 10:16:37 -0400 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH] rootfs: Use tmpfs for rootfs even if root= is given Content-Language: en-US To: Rob Landley , Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org, "Milton D. Miller II" , Jeff Layton , Jens Axboe , Jim Cromie , Sam Ravnborg , "Eric W. Biederman" , Alexander Viro , "H. Peter Anvin" , Mimi Zohar References: <20231031154417.621742-1-stefanb@linux.ibm.com> <2023103159-punctuate-amount-f09d@gregkh> <6dae6aa6-e6c6-89d6-f9d7-7563708f7662@landley.net> From: Stefan Berger In-Reply-To: <6dae6aa6-e6c6-89d6-f9d7-7563708f7662@landley.net> Content-Type: text/plain; charset=UTF-8; format=flowed X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: A301PZar53WvtTcvB4WkdgaSDqnXQB_f X-Proofpoint-GUID: W4Mf0NfUK1vWzLWTZ5Ii_49ShGxglLYx Content-Transfer-Encoding: 7bit X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-01_12,2023-11-01_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=727 spamscore=0 malwarescore=0 clxscore=1015 mlxscore=0 suspectscore=0 adultscore=0 impostorscore=0 priorityscore=1501 bulkscore=0 phishscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2310240000 definitions=main-2311010119 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/1/23 07:35, Rob Landley wrote: > On 10/31/23 11:56, Greg Kroah-Hartman wrote: >> On Tue, Oct 31, 2023 at 11:44:17AM -0400, Stefan Berger wrote: >>> rootfs currently does not use tmpfs if the root= boot option is passed >>> even though the documentation about rootfs (added in 6e19eded3684) in >>> Documentation/filesystems/ramfs-rootfs-initramfs.rst states: >>> >>> If CONFIG_TMPFS is enabled, rootfs will use tmpfs instead of ramfs by >>> default. To force ramfs, add "rootfstype=ramfs" to the kernel command >>> line. >> >> At this point in time, is there even any difference between ramfs and >> tmpfs anymore? Why would you want to choose one over the other here? > > I submitted a patch to fix this to the list multiple times, which got ignored as > always. Most recently here: > > https://lore.kernel.org/lkml/8244c75f-445e-b15b-9dbf-266e7ca666e2@landley.net/ Everyone, I now responded to Rob's patch over here: https://lkml.org/lkml/2023/11/1/333 > > Rob