Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp5773097pxj; Wed, 23 Jun 2021 08:39:16 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwIHAcMSIRKnLB76R0GI4iLOrBAaxvvm+By9AL630h1Y0DEggkJGB4/skdPb2iqW9or3kX4 X-Received: by 2002:a17:906:dbdc:: with SMTP id yc28mr661808ejb.444.1624462755767; Wed, 23 Jun 2021 08:39:15 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1624462755; cv=none; d=google.com; s=arc-20160816; b=tYYAC+BIV2lSQRIlZeySSJxi7S1JT4gpVCrGAuAVdkbhCFFb0xciKdsY0wADnxOOPt l2tf0aaEg8913EBk69mMUz1OIlrP3z/Jj/4qx3x6CfYGfrPjhZWz5wIsAXEaqAljoT5j 4P2NOeNZm+Xi3Vmwa22N2D4pb0Z2EWcnLbtSOhBPsZfxrapHsyvnOhpHXEODXow1jipq zt+dff6/KPitZpGHoYJP7ebBHmxNdBIlCgFEXpDkedl4J92ikjU2Yo4HMLndcOanVGkW vihNP49p7BaPYTywQo7PBRulF7eMw0mWqFSXC6kf1/ckwGrSjRzcbp/roGBBy+t691un 2NTQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:from:user-agent:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:date :dkim-signature:dkim-filter; bh=C0ldnnfItrksyzSWEdygG6r+faUPIuD0G9fbM4OzvnI=; b=iWD7uej1gbFstA3nmKrErnSs22tX8d2Opij8oN1PlmdVXiI5PvErACUF0+epc2SxQw QVksUfqGApY2KpYbEny5lezzvuLE3XwZzzDXokURSUUIzRFeeF/y9Gqgx+2fXPPJuK8i x2Rvakcza8jNnssUpROvzfdGg3i/SdcEr1lO24GGLs5OFsR3Q76aJMxl++0FdlyZV+Mj dSCFKn2ju8Z16f7pM+RkDGu6SdagEM+FqTCi04EKrrqCS/oZz0dVqfTePgG4fYD5+SQp 9b72WSl19AO1ElkFMU826ePBTzh0FX54J9FoGgVB8bTJLSeeX46bTuQE4ftfGN91hzbL nypQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@fieldses.org header.s=default header.b=zS4oqVYh; 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 mm19si21454ejb.237.2021.06.23.08.38.42; Wed, 23 Jun 2021 08:39:15 -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=zS4oqVYh; 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 S231389AbhFWPiH (ORCPT + 99 others); Wed, 23 Jun 2021 11:38:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46608 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231409AbhFWPiH (ORCPT ); Wed, 23 Jun 2021 11:38:07 -0400 Received: from fieldses.org (fieldses.org [IPv6:2600:3c00:e000:2f7::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9D3B0C061574 for ; Wed, 23 Jun 2021 08:35:49 -0700 (PDT) Received: by fieldses.org (Postfix, from userid 2815) id 20F216208; Wed, 23 Jun 2021 11:35:48 -0400 (EDT) DKIM-Filter: OpenDKIM Filter v2.11.0 fieldses.org 20F216208 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fieldses.org; s=default; t=1624462548; bh=C0ldnnfItrksyzSWEdygG6r+faUPIuD0G9fbM4OzvnI=; h=Date:To:Cc:Subject:References:In-Reply-To:From:From; b=zS4oqVYhQWRd1DoVFEAW7/+2NIAUk1LUhIz768XezL0j6sWa5rZhevfpla7NhyW3X MjGWGYVX8xQOjl4ORp75EMCtIp5hfDpx7EBR1opzMFA6wiU3UL3Q5e9oiT/OOv0vtk AN5kUTMumz4Y7ydi1dhQpTZPtgtqk9AskcLuPQD0= Date: Wed, 23 Jun 2021 11:35:48 -0400 To: NeilBrown Cc: Wang Yugui , linux-nfs@vger.kernel.org Subject: Re: any idea about auto export multiple btrfs snapshots? Message-ID: <20210623153548.GF20232@fieldses.org> References: <162432531379.17441.15110145423567943074@noble.neil.brown.name> <20210622112253.DAEE.409509F4@e16-tech.com> <20210622151407.C002.409509F4@e16-tech.com> <162440994038.28671.7338874000115610814@noble.neil.brown.name> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <162440994038.28671.7338874000115610814@noble.neil.brown.name> User-Agent: Mutt/1.5.21 (2010-09-15) From: bfields@fieldses.org (J. Bruce Fields) Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Is there any hope of solving this problem within btrfs? It doesn't seem like it should have been that difficult for it to give subvolumes separate superblocks and vfsmounts. But this has come up before, and I think the answer may have been that it's just too late to fix. --b.