Received: by 2002:a05:6a10:1287:0:0:0:0 with SMTP id d7csp5499856pxv; Wed, 28 Jul 2021 12:15:18 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxIUavdh/k54JFB6boB/tximU9qwi7Y4s36VGiAqfJXGkw8cSVnfNXwu9zM7yZbuI40zz9F X-Received: by 2002:a17:907:2721:: with SMTP id d1mr944733ejl.170.1627499718272; Wed, 28 Jul 2021 12:15:18 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1627499718; cv=none; d=google.com; s=arc-20160816; b=hVjXAsrUUquM3hVHdl/Q067rUSrLqUxS/5jIrikE6l2YVueeVYFqzsb0V7VdHYwIkf nLyD7qNNKBbWU2xrH+Tp18aj50T0XxRhqRBBFYg8KDCJSj3CP1cICqcCOtXDAWT5Gu7X GvNbZhASMzs0V4mapGCHXiavX0PRGS8hJDuRU8vIzOUxvOa4DRa8PTuuiv5hac2foVW1 JkMVF86olovU+w6QaqdQEfYm4LwjxkYVdZFAicg9p6jx1uBI1pnYLLNnS/LfVFyPkIGg NYdhOyt/PM/ZjbetO2DGfJR/9T+Xno7cFHJUok+8IuABWBKZO7owbaCDp48tOYdeRrS1 NBWw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:user-agent:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :dkim-signature:dkim-filter; bh=eLHyd9f1nxMzdFMQUYsbq1YAVKzyuU/thj/3IlS+rN8=; b=P1BVDGfbMnFtNocyRRW/1svVmCEOHF9IEJgRgKD6C5snwPalCJ8hPtzHWAh1AOpETw sswpZUYQaOGIaAqp05TCMQXCeGWYCDweqLU6i7ayNCoBgJS9sW+IDOFWUcWbXXt/MY6Q 9pvVpg2Xl5lk7UxWr1VX6cNgaUoV0yNlFOthIJeuUfCQO1MYccHy9uqXz3aVtVqJaKBg Fg1FFG5KqHoQlnRMKJ/yxOo/z1keDoj1Z+B+buNevfyTIX6BOcXP/3j30RvTDovBQqBy s8IGGfhdtyvzWSXyRy33R1jZxtEcf6WJMQ8dm06rRG+YQ4VPRI8NEpyWShTJ395PQzvA 3eLQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@fieldses.org header.s=default header.b="GI/8MLOO"; spf=pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-nfs-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id y9si488284edc.381.2021.07.28.12.14.39; Wed, 28 Jul 2021 12:15:18 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@fieldses.org header.s=default header.b="GI/8MLOO"; spf=pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-nfs-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230228AbhG1TOe (ORCPT + 99 others); Wed, 28 Jul 2021 15:14:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229542AbhG1TOe (ORCPT ); Wed, 28 Jul 2021 15:14:34 -0400 Received: from fieldses.org (fieldses.org [IPv6:2600:3c00:e000:2f7::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8BBB5C061757; Wed, 28 Jul 2021 12:14:32 -0700 (PDT) Received: by fieldses.org (Postfix, from userid 2815) id 7D8237C6F; Wed, 28 Jul 2021 15:14:31 -0400 (EDT) DKIM-Filter: OpenDKIM Filter v2.11.0 fieldses.org 7D8237C6F DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fieldses.org; s=default; t=1627499671; bh=eLHyd9f1nxMzdFMQUYsbq1YAVKzyuU/thj/3IlS+rN8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=GI/8MLOOvbWzAw3TGd39dplxrahRkVMDJve9j0rIzSxMgxbkYgIPJU2RNA+20tvV6 +DbMjnPmh5Fezu+2M1UBC6L1yzcCBJNU1HbTceFM/t6ha5GZmx1lrLbnfXdoCyKHIy 22WjvHwX9xsQc7ezqpGMeDw/SXBu6Yti3hc+XT14= Date: Wed, 28 Jul 2021 15:14:31 -0400 From: "J. Bruce Fields" To: Neal Gompa Cc: NeilBrown , Wang Yugui , Christoph Hellwig , Josef Bacik , Chuck Lever , Chris Mason , David Sterba , Alexander Viro , linux-fsdevel , linux-nfs@vger.kernel.org, Btrfs BTRFS Subject: Re: [PATCH/RFC 00/11] expose btrfs subvols in mount table correctly Message-ID: <20210728191431.GA3152@fieldses.org> References: <162742539595.32498.13687924366155737575.stgit@noble.brown> <20210728125819.6E52.409509F4@e16-tech.com> <20210728140431.D704.409509F4@e16-tech.com> <162745567084.21659.16797059962461187633@noble.neil.brown.name> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org On Wed, Jul 28, 2021 at 08:26:12AM -0400, Neal Gompa wrote: > I think this is behavior people generally expect, but I wonder what > the consequences of this would be with huge numbers of subvolumes. If > there are hundreds or thousands of them (which is quite possible on > SUSE systems, for example, with its auto-snapshotting regime), this > would be a mess, wouldn't it? I'm surprised that btrfs is special here. Doesn't anyone have thousands of lvm snapshots? Or is it that they do but they're not normally mounted? --b.