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=-7.5 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 D5C8AC47082 for ; Mon, 7 Jun 2021 16:31:37 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 6628660FF0 for ; Mon, 7 Jun 2021 16:31:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6628660FF0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=tempfail smtp.mailfrom=linux-lvm-bounces@redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1623083496; h=from:from:sender:sender:reply-to: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:list-id:list-help: list-unsubscribe:list-subscribe:list-post; bh=tCnYkzeQFKsfo4CoSNZMj1YM+mWdRfsv6AilCXyCZGI=; b=VYsrtWNmamI0V3Pw5+3Db4yOSUtNKIFcH+XVxwwnv2YLi1ytza0aB5K6FocqA01ayL5diL NceqYbMY+8JC6A78P0JZD1qqTnxmlIJdqruZb5MJPYAhecupXWEK7WpTNtJqwdROUWQg0H cfWLzp/GPQAs5H/UAAQnIX2KqXxF9ug= 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-236-pUd_4axROGyp3R2neTF1mA-1; Mon, 07 Jun 2021 12:31:34 -0400 X-MC-Unique: pUd_4axROGyp3R2neTF1mA-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 AAAD3C73AA; Mon, 7 Jun 2021 16:31:28 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 1956A10013C1; Mon, 7 Jun 2021 16:31:25 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id E508B1801266; Mon, 7 Jun 2021 16:31:17 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 157GVEaZ019238 for ; Mon, 7 Jun 2021 12:31:15 -0400 Received: by smtp.corp.redhat.com (Postfix) id EB2DB369A; Mon, 7 Jun 2021 16:31:14 +0000 (UTC) Received: from [10.40.195.144] (unknown [10.40.195.144]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1DEF1620DE; Mon, 7 Jun 2021 16:31:13 +0000 (UTC) To: Martin Wilck , Heming Zhao , "teigland@redhat.com" , "linux-lvm@redhat.com" References: From: Zdenek Kabelac Message-ID: Date: Mon, 7 Jun 2021 18:31:13 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0 Thunderbird/78.10.1 MIME-Version: 1.0 In-Reply-To: X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-loop: linux-lvm@redhat.com Subject: Re: [linux-lvm] Discussion: performance issue on event activation mode X-BeenThere: linux-lvm@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-lvm-bounces@redhat.com Errors-To: linux-lvm-bounces@redhat.com X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=linux-lvm-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-15"; Format="flowed" Dne 07. 06. 21 v 17:48 Martin Wilck napsal(a): > On So, 2021-06-06 at 14:15 +0800, heming.zhao@suse.com wrote: >> 1. During boot phase, lvm2 automatically swithes to direct activation >> mode >> ("event_activation =3D 0"). After booted, switch back to the event >> activation mode. >> >> Booting phase is a speical stage. *During boot*, we could "pretend" >> that direct >> activation (event_activation=3D0) is set, and rely on lvm2-activation- >> *.service >> for PV detection. Once lvm2-activation-net.service has finished, we >> could >> "switch on" event activation. > I like this idea. Alternatively, we could discuss disabling event > activation only in the "coldplug" phase after switching root (i.e. > between start of systemd-udev-trigger.service and lvm2- > activation.service), because that's the critical time span during which > 1000s of events can happen simultaneously. Hello In lvm2 we never actually suggested to use 'autoactivation' during the boot= -=20 this case doesn't make much sense - as it's already know ahead of time whic= h=20 device ID is needed to be activated. So whoever started to use autoactivati= on=20 during boot - did it his own distro way.=A0=A0 Fedora=A0 nor RHEL uses this= .=A0 On=20 second note=A0 David is currently trying to optimize and rework Dracut's bo= oting=20 as it didn't aged quite well and there are several weak points to be fixed. Regards Zdenek _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://listman.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/