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=-3.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 50DECC2B9F4 for ; Mon, 14 Jun 2021 14:08:53 +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 07C7961352 for ; Mon, 14 Jun 2021 14:08:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 07C7961352 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:37366 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lsnGm-0003wS-7X for qemu-devel@archiver.kernel.org; Mon, 14 Jun 2021 10:08:52 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:32904) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lsnFQ-0002O7-63 for qemu-devel@nongnu.org; Mon, 14 Jun 2021 10:07:28 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:26246) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lsnFN-0003MO-5D for qemu-devel@nongnu.org; Mon, 14 Jun 2021 10:07:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1623679644; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=1bKopgjZfg7HQoJEZatXWRc4JEFQ42yCr4pCREAwO1c=; b=B3WUjvjwKsUH+UDaAESHomRQUUpIvjwS7J+HqwSsUlCa+IehycOc+SMv2C+380Yrj8m5Ea h3GzUhjPF6PvTP9+93XVU5q8f74p+wNHM0n3wa77i+kkS29V76dWXST7VZuT0gCQgy2M4i DX2xaZCRyYRES526yD/Fe2yBMDBUqvY= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-97-1DQRJtUZNWKuM--tTjtqqg-1; Mon, 14 Jun 2021 10:07:23 -0400 X-MC-Unique: 1DQRJtUZNWKuM--tTjtqqg-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 9D90C185061C; Mon, 14 Jun 2021 14:07:21 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-112-38.ams2.redhat.com [10.36.112.38]) by smtp.corp.redhat.com (Postfix) with ESMTPS id ECE2210016F4; Mon, 14 Jun 2021 14:07:08 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 11C1B18000B2; Mon, 14 Jun 2021 16:07:06 +0200 (CEST) Date: Mon, 14 Jun 2021 16:07:06 +0200 From: Gerd Hoffmann To: Claudio Fontana Subject: Re: [PATCH v2 00/18] modules: add metadata database Message-ID: <20210614140706.o7vqhweo3oqklhct@sirius.home.kraxel.org> References: <20210610055755.538119-1-kraxel@redhat.com> <20210610095434.iygaxizo5h3745zf@sirius.home.kraxel.org> MIME-Version: 1.0 In-Reply-To: X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kraxel@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=216.205.24.124; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.2, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, 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: David Hildenbrand , qemu-devel@nongnu.org, Eric Blake , Samuel Thibault , qemu-block@nongnu.org, "Michael S. Tsirkin" , Markus Armbruster , Halil Pasic , Christian Borntraeger , =?utf-8?Q?Marc-Andr=C3=A9?= Lureau , Thomas Huth , Michael Roth , Peter Lieven , qemu-s390x@nongnu.org, Ronnie Sahlberg , =?utf-8?B?Sm9zw6k=?= Ricardo Ziviani , Richard Henderson , Kevin Wolf , berrange@redhat.com, Cornelia Huck , Max Reitz , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hi, > Based on the information you provided, the reason this whole series > exists seems to be to remove the need to update modules in multiple > places. Well, I'm trying to improve the way we handle module meta-data (see other mail just send for details). > Is there a real need to copy over the mechanism from the kernel, or > are the requirements actually different/simpler here? Even though the exact kind of meta-data is different (qemu wants know qom types implemented by module, kernel wants know what hardware a module can drive) the fundamental problem is the same: We need some meta-data about modules for lookup. The workflow is simliar too: The meta-data is stored in a .modinfo elf section. Then a utility collects that data and stores them in a database. For the kernel 'depmod' stores the data in /lib/modules/$version/modules.$name (with modules.alias being the largest database). I'm trying to have qemu-modinfo store this in modinfo.json. take care, Gerd