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,DKIM_SIGNED, DKIM_VALID,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 34546C433E6 for ; Tue, 19 Jan 2021 14:38:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F2AA22072C for ; Tue, 19 Jan 2021 14:38:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387712AbhASOhb (ORCPT ); Tue, 19 Jan 2021 09:37:31 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44568 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387429AbhASJ3F (ORCPT ); Tue, 19 Jan 2021 04:29:05 -0500 Received: from mail-wr1-x435.google.com (mail-wr1-x435.google.com [IPv6:2a00:1450:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D231AC061573 for ; Tue, 19 Jan 2021 01:28:24 -0800 (PST) Received: by mail-wr1-x435.google.com with SMTP id m4so18969431wrx.9 for ; Tue, 19 Jan 2021 01:28:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rkjnsn-net.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=eCNLXStw5RDu0DTNKnoDJaRPnv/wj5VIjUz8eX6PXeY=; b=Ri60W7B92jg8uZWruHrWdhPlCNY9na8xBCKNLivZPxvNyYZ2rnGFHa6Lb44YaAhThD 9OnqjlUaAMsex2Jco1hNhD/HjudsUY/xjsgg9Dcx1KaBpTEpaGKVpTY0An4OiHLjsK7a +U6HkseNdiAzf8leJGgH29StWaGzbzCX241PBT0KTnlTC31WFVhtxjAYdPv0kO9kHMt5 wj5DXZlWgeg4uMFfUliymmzTZrHW9uazXb0fC/yH0+G91yCEQ4xSDDPNcVNNs/S2NLRW M7OlVtfKqykw9ww+KYWp4vgQRy1Mvc8/550KJOj2zWrqS8uszW4e1mwFP97wp8SyDffA k9SA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=eCNLXStw5RDu0DTNKnoDJaRPnv/wj5VIjUz8eX6PXeY=; b=XLrlWz6KvHAwGTp4vgfBMBiY0dfyEn7Z7zKfPJhPrZ0KhfCr4NOFg6TXgF5X7b+MmU GHl7tYzQMQYL2E2iLpaQiPbNxuQeuoTCyZEopOah9M1bAa8ic9XEsVvMqSzBm7zTXKRD FiSL5OAuE7XEh4l9+slmBTpnClviCbSSvtUrLlW8ssqhg3SZOltPp2pj9PAhoJDeIm2q cpTgGIaW59CMOs6SVZaUgEEkITIPr/ZAzsXFMjrkbYluo/bgcWgSnlLzHle6uDBcj4K0 xc9NNZxW7yMsfgcUEKeKvWAFZJXiKH4e6vk2QHctKWC8DOI5ojtsuL7tmLzbJ81oNdxi kSZQ== X-Gm-Message-State: AOAM531w8V5D7kLYRVmNjoZSHgQhy1aSqY1leEp6YpuObS5ygPARV3xp pHa7Asm9B2HcWK+NKotnJLpSIQM/gWYLs+QYMyCeRQ== X-Google-Smtp-Source: ABdhPJzOSQ2a2fSLtdrySN5qU2nKdhrSbFqiM3OQogW5yB1uzOFU8QfBR+CL0MtCJeAHmAkpNLX12vBDHHlT1Mmthpo= X-Received: by 2002:a05:6000:185:: with SMTP id p5mr3313185wrx.403.1611048503547; Tue, 19 Jan 2021 01:28:23 -0800 (PST) MIME-Version: 1.0 References: <20190521091842.GS1667@carfax.org.uk> <8aa09a61-aa1c-5dcd-093f-ec096a38a7b5@gmx.com> <684e89f3-666f-6ae6-5aa2-a4db350c1cd4@gmx.com> <218f6448-c558-2551-e058-8a69caadcb23@gmx.com> <3b2fe3d7-1919-d236-e6bb-483593287cc5@gmx.com> In-Reply-To: From: Erik Jensen Date: Tue, 19 Jan 2021 01:28:12 -0800 Message-ID: Subject: Re: "bad tree block start" when trying to mount on ARM To: Qu Wenruo Cc: Hugo Mills , linux-btrfs Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On Mon, Jan 18, 2021 at 9:22 PM Erik Jensen wrote: > > On Mon, Jan 18, 2021 at 4:12 AM Erik Jensen wrote= : > > > > The offending system is indeed ARMv7 (specifically a Marvell ARMADA=C2= =AE > > 388), but I believe the Broadcom BCM2835 in my Raspberry Pi is > > actually ARMv6 (with hardware float support). > > Using NBD, I have verified that I receive the same error when > attempting to mount the filesystem on my ARMv6 Raspberry Pi: > [ 3491.339572] BTRFS info (device dm-4): disk space caching is enabled > [ 3491.394584] BTRFS info (device dm-4): has skinny extents > [ 3492.385095] BTRFS error (device dm-4): bad tree block start, want > 26207780683776 have 3395945502747707095 > [ 3492.514071] BTRFS error (device dm-4): bad tree block start, want > 26207780683776 have 3395945502747707095 > [ 3492.553599] BTRFS warning (device dm-4): failed to read tree root > [ 3492.865368] BTRFS error (device dm-4): open_ctree failed > > The Raspberry Pi is running Linux 5.4.83. > Okay, after some more testing, ARM seems to be irrelevant, and 32-bit is the key factor. On a whim, I booted up an i686, 5.8.14 kernel in a VM, attached the drives via NBD, ran cryptsetup, tried to mount, and=E2=80= =A6 I got the exact same error message.