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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 BF657C636C9 for ; Mon, 19 Jul 2021 09:19:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A879060FF4 for ; Mon, 19 Jul 2021 09:19:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235404AbhGSIjD (ORCPT ); Mon, 19 Jul 2021 04:39:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60794 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234730AbhGSIjC (ORCPT ); Mon, 19 Jul 2021 04:39:02 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0A151C061574; Mon, 19 Jul 2021 01:20:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=fV+v0WEDYq1e/99KIYLPM4pt2RQcHsAUsEfsMJoG2mk=; b=BcM7xFZbRqaTUQKPjlJgNNxrxl LObLueIAeKKSN9c0+2VWf7ks6Zz27TzT9TNCGMY3NOE2nJZrQTVS9XFQheOPiJ4jd32qiC/GsBmBf tRCZ49n+zh3URnbVy0zinXSf3GaBXsFBzE7pLNjsubLupGIULyEMPjwO0yqXA1qZUgAFa16ARNzV5 JFKbKgu3a5SbWfGByf0NQ4ex6OWTigsk1izpWkGe4u8qHSX0oBIm2+mMyRU1sN6Q58JD2tKE74s0g wAFhfrM/ByJZGlIqQSGtcmxbT8eIrlXUSU+sWtu8ZJVTfr8PaEtD0ZsxDRMwrjh34H7QoThONt5IB l7KIVupQ==; Received: from hch by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1m5POJ-006h2m-3V; Mon, 19 Jul 2021 09:17:26 +0000 Date: Mon, 19 Jul 2021 10:16:47 +0100 From: Christoph Hellwig To: Josef Bacik Cc: Christoph Hellwig , NeilBrown , "J. Bruce Fields" , Chuck Lever , Chris Mason , David Sterba , linux-nfs@vger.kernel.org, Wang Yugui , Ulli Horlacher , linux-btrfs@vger.kernel.org Subject: Re: [PATCH/RFC] NFSD: handle BTRFS subvolumes better. Message-ID: References: <20210613115313.BC59.409509F4@e16-tech.com> <20210310074620.GA2158@tik.uni-stuttgart.de> <162632387205.13764.6196748476850020429@noble.neil.brown.name> <28bb883d-8d14-f11a-b37f-d8e71118f87f@toxicpanda.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On Thu, Jul 15, 2021 at 02:01:11PM -0400, Josef Bacik wrote: > This is not a workable solution. It's not a matter of simply tying into > existing infrastructure, we'd have to completely rework how the VFS deals > with this stuff in order to be reasonable. And when I brought this up to Al > he told me I was insane and we absolutely had to have a different SB for > every vfsmount, which means we can't use vfsmount for this, which means we > don't have any other options. Thanks, Then fix the problem another way. The problem is known, old and keeps breaking stuff. Don't paper over it, fix it.