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=-3.8 required=3.0 tests=BAYES_00, 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 189BBC43470 for ; Sat, 10 Apr 2021 14:48:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EA7F2610CD for ; Sat, 10 Apr 2021 14:48:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234757AbhDJOtE (ORCPT ); Sat, 10 Apr 2021 10:49:04 -0400 Received: from rin.romanrm.net ([51.158.148.128]:59038 "EHLO rin.romanrm.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234698AbhDJOtD (ORCPT ); Sat, 10 Apr 2021 10:49:03 -0400 Received: from natsu (natsu2.home.romanrm.net [IPv6:fd39::e99e:8f1b:cfc9:ccb8]) by rin.romanrm.net (Postfix) with SMTP id 763B2720; Sat, 10 Apr 2021 14:48:43 +0000 (UTC) Date: Sat, 10 Apr 2021 19:48:42 +0500 From: Roman Mamedov To: Paul Leiber Cc: "linux-btrfs@vger.kernel.org" Subject: Re: Parent transid verify failed (and more): BTRFS for data storage in Xen VM setup Message-ID: <20210410194842.71f49059@natsu> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On Sat, 10 Apr 2021 13:38:57 +0000 Paul Leiber wrote: > d) Perhaps the complete BTRFS setup (Xen, VMs, pass through the partition, Samba share) is flawed? I kept reading and reading to find where you say you unmounted in on the host, and then... :) > e) Perhaps it is wrong to mount the BTRFS root first in the Dom0 and then accessing the subvolumes in the DomU? Absolutely O.o Subvolumes are very much like directories, not any kind of subpartitions. Imagine you'd try to use the same ext4 from the host and from a VM guest, saying "but they both store their data in separate folders!" -- With respect, Roman