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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 1FD5BC07E9B for ; Tue, 20 Jul 2021 06:25:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EEE0060FF4 for ; Tue, 20 Jul 2021 06:25:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231515AbhGTFoe (ORCPT ); Tue, 20 Jul 2021 01:44:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45548 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241994AbhGTFo2 (ORCPT ); Tue, 20 Jul 2021 01:44:28 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C2E3BC061574; Mon, 19 Jul 2021 23:25:06 -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=gi3dKQNPawi4I2tSsGsNy/bQDTWLIwmslwDooDCtDjw=; b=lnyaYhqO0uP8fA2gybDeSa0Lf8 5UjzJH40WTFON8EkfFcY7qokkC9kyeFLr9yUp3Lnb/G/SMUZaXUh+NpcrPOOo6eWUyq3s+KIn+Hfy q5oP5D1syun10HhXkkykZMiZciis007AH3x/7iffyUJqK+At3Zm7m+h5CYNIBC7fF6EJ7fc3BXrUq yPWcVd9z16zCGVos6cE7vJ8s9SoDp3F+aGYJDltjXFLyaysqhiGzSfcQ2anlaOA/W9G5Qbe4hCg7Z /nh02Lp9ThK2afUXRLCUE7zZ4t0p+rAO6Zz8aAoZ4Kjo8ZKYICslKoKy8U1bMCeghzwC7Ly/jfNPl qto45Jrg==; Received: from hch by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1m5jAV-007p0v-6h; Tue, 20 Jul 2021 06:23:57 +0000 Date: Tue, 20 Jul 2021 07:23:51 +0100 From: Christoph Hellwig To: NeilBrown Cc: Christoph Hellwig , Josef Bacik , "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> <162673888433.4136.7451392112850411713@noble.neil.brown.name> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <162673888433.4136.7451392112850411713@noble.neil.brown.name> 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 Tue, Jul 20, 2021 at 09:54:44AM +1000, NeilBrown wrote: > Do you have any pointers to other breakage caused by this particular > behaviour of btrfs? It would to have all requirements clearly on the > table while designing a solution. A quick google find: https://lore.kernel.org/linux-btrfs/b5e7e64a-741c-baee-bc4d-cd51ca9b3a38@gmail.com/T/ https://savannah.gnu.org/bugs/?50859 https://github.com/coreos/bugs/issues/301 https://bugs.kde.org/show_bug.cgi?id=317127 https://github.com/borgbackup/borg/issues/4009 https://bugs.python.org/issue37339 http://mail.openjdk.java.net/pipermail/nio-dev/2017-June/004292.html and that is just the first 2 or three pages of trivial search results.