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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0F704C433F5 for ; Thu, 30 Sep 2021 16:05:57 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 B0DB1613A9 for ; Thu, 30 Sep 2021 16:05:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org B0DB1613A9 Authentication-Results: mail.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1633017955; 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=/Lxy8hrmt9xCeju/K8IQLkod8oFp4X3Q6Aqp2EOZCqc=; b=U2XbXmYPlvN9kJ9zLTYcxzJNMogJIt3SksTiAw1VGfjE7S+amnzbazC5VUeq7DOz34c0iF MdRag7XLYzhGs28lFOV8OVJ/9uznYuA9aDV6RhKOO5NILS1pjbLYvdkw1U4B7jgGAFHeQr FqNkbVYbNF68E8InNgM82nLV7gqTpEQ= 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-39-WDSYB9s9Pg-dduu5SNXqrA-1; Thu, 30 Sep 2021 12:05:52 -0400 X-MC-Unique: WDSYB9s9Pg-dduu5SNXqrA-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 2C91783DBC1; Thu, 30 Sep 2021 16:05:46 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id F18061346F; Thu, 30 Sep 2021 16:05:44 +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 6A16C4EA2A; Thu, 30 Sep 2021 16:05:41 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 18UG5ddj016668 for ; Thu, 30 Sep 2021 12:05:39 -0400 Received: by smtp.corp.redhat.com (Postfix) id 717E85BAE5; Thu, 30 Sep 2021 16:05:39 +0000 (UTC) Received: from redhat.com (unknown [10.15.80.136]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 231AB60877; Thu, 30 Sep 2021 16:05:00 +0000 (UTC) Date: Thu, 30 Sep 2021 11:04:58 -0500 From: David Teigland To: Peter Rajnoha Message-ID: <20210930160458.GC32174@redhat.com> References: <20210909194417.GC19437@redhat.com> <20210927100032.xczilyd5263b4ohk@alatyr-rpi.brq.redhat.com> <20210927153822.GA4779@redhat.com> <9947152f39a9c5663abdbe3dfee343556e8d53d7.camel@suse.com> <20210928144254.GC11549@redhat.com> <138b7ddb721b6a58df8f0401b76c7975678f0dda.camel@suse.com> <20210928174246.GF3087@octiron.msp.redhat.com> <20210929220653.p45cvgzdhlbnp4gy@alatyr-rpi.brq.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 10.5.11.13 X-loop: linux-lvm@redhat.com Cc: "zkabelac@redhat.com" , "bmarzins@redhat.com" , Heming Zhao , "linux-lvm@redhat.com" , Martin Wilck 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 2.79 on 10.5.11.11 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, Sep 30, 2021 at 01:29:07PM +0200, Peter Rajnoha wrote: > If we see this udev settle as the key point, then I think we should probably > concentrate on enhancing systemd/udev to provide this functionality (and > primarily the udevadm trigger functionality and waiting for related > synthesized events). I think the infrastructure to accomplish this is > already there. It just needs suitable user-space changes (the udevadm > trigger). I think it would be nice if the waiting/settling concept was generalized a little more than we have now, to make it easier to improve or replace the implementation, either as we find better mechanisms or as user needs vary. 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/