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=-7.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 49EF5C2B9F4 for ; Thu, 17 Jun 2021 15:32:05 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) (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 E3EB4613E2 for ; Thu, 17 Jun 2021 15:32:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E3EB4613E2 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=1623943923; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc: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=UxDC/Swp5sFE7Lk4BDgfVdB4zlBiJxWhHdTvO/2P9jw=; b=UVScTR/Xv7qDfWDqS8MULmMz7JCyXGQE6ma/9TQPbKBUacXvYUW7FSPPfLOug9D1gDuwRx TRztsmzAERCBa+q0LblPvA/MXSRYpI/LwnqKlqopwSESLCLk2Np754hjHjbcMyX4xphlz0 csrZu8fFNauwarqBuS0ObvEyRNVcicE= 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-151-2vOehiLVOrGwUQjv8gLrPQ-1; Thu, 17 Jun 2021 11:31:57 -0400 X-MC-Unique: 2vOehiLVOrGwUQjv8gLrPQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id D080180B731; Thu, 17 Jun 2021 15:31:48 +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 A929F9808; Thu, 17 Jun 2021 15:31:46 +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 C161F1809CAD; Thu, 17 Jun 2021 15:31:31 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 15HFRn6T017875 for ; Thu, 17 Jun 2021 11:27:49 -0400 Received: by smtp.corp.redhat.com (Postfix) id 59B585C224; Thu, 17 Jun 2021 15:27:49 +0000 (UTC) Received: from redhat.com (null.msp.redhat.com [10.15.80.136]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 83A395C1D1; Thu, 17 Jun 2021 15:27:45 +0000 (UTC) Date: Thu, 17 Jun 2021 10:27:43 -0500 From: David Teigland To: "heming.zhao@suse.com" Message-ID: <20210617152743.GA25086@redhat.com> References: <20210607213003.GA8181@redhat.com> <1760ea9715bc7a16d4efe10dd95105d663a07228.camel@suse.com> <20210608153937.GA21355@redhat.com> <20210615170354.GA357@redhat.com> <20210616163816.GA5811@redhat.com> MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/1.8.3 (2017-05-23) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-loop: linux-lvm@redhat.com Cc: "rogerheflin@gmail.com" , "zkabelac@redhat.com" , Martin Wilck , prajnoha@redhat.com, "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 10.5.11.23 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-Disposition: inline Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On Thu, Jun 17, 2021 at 11:46:55AM +0800, heming.zhao@suse.com wrote: > the booting time out problem cause by two side: > 1> libudev take much time > 2> thousands of lvm2-pvscan@.service running on the same time > > the new patch or existing code (with obtain_device_list_from_udev=0) can avoid <1>. > but <2> is still not to avoid. (direct activation can avoid it) Thanks, I'll set up a similar test, hopefully we can avoid such extreme delays with the current activation mechanism. I expect we'll also look at combining a fixed lvm-activation service followed by uevent-driven activations, which should be more efficient. Dave _______________________________________________ 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/