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=-2.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 B0D62C433E0 for ; Fri, 22 May 2020 01:33:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6CC2F207F7 for ; Fri, 22 May 2020 01:33:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=gmx.net header.i=@gmx.net header.b="QB9I2n+i" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726839AbgEVBdC (ORCPT ); Thu, 21 May 2020 21:33:02 -0400 Received: from mout.gmx.net ([212.227.15.19]:33861 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726335AbgEVBdB (ORCPT ); Thu, 21 May 2020 21:33:01 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1590111178; bh=51m3PXpqldWmJFgoczjKU2XNQmWDWOse2g+iNI44TQk=; h=X-UI-Sender-Class:Subject:To:References:From:Date:In-Reply-To; b=QB9I2n+ir82wZc003Zr9CEx1kdgHsEdyqX8AkQfFixKwiQ3SLsDSVZCpzufKDC8fh 09v+PZ+vSPCUCVc8bmnWUHire7Fdn9gpyLRGxEBt2jNI7GPIxFazKgSkkaXQ5WNtik 2rJZCwFScMcGaCyQF0sraafTE1jsObqTM7znofLQ= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from [0.0.0.0] ([149.28.201.231]) by mail.gmx.com (mrgmx005 [212.227.17.184]) with ESMTPSA (Nemesis) id 1McH9i-1j3yiL3BIS-00cdgx; Fri, 22 May 2020 03:32:58 +0200 Subject: Re: Trying to mount hangs To: Pierre Abbat , linux-btrfs@vger.kernel.org References: <2549429.Qys7a5ZjRC@puma> <87436f2d-40d2-5fa1-cdee-4cc4f63e68c9@gmx.com> <7541432.rVhWMRgfCE@puma> From: Qu Wenruo Autocrypt: addr=quwenruo.btrfs@gmx.com; prefer-encrypt=mutual; keydata= mQENBFnVga8BCACyhFP3ExcTIuB73jDIBA/vSoYcTyysFQzPvez64TUSCv1SgXEByR7fju3o 8RfaWuHCnkkea5luuTZMqfgTXrun2dqNVYDNOV6RIVrc4YuG20yhC1epnV55fJCThqij0MRL 1NxPKXIlEdHvN0Kov3CtWA+R1iNN0RCeVun7rmOrrjBK573aWC5sgP7YsBOLK79H3tmUtz6b 9Imuj0ZyEsa76Xg9PX9Hn2myKj1hfWGS+5og9Va4hrwQC8ipjXik6NKR5GDV+hOZkktU81G5 gkQtGB9jOAYRs86QG/b7PtIlbd3+pppT0gaS+wvwMs8cuNG+Pu6KO1oC4jgdseFLu7NpABEB AAG0IlF1IFdlbnJ1byA8cXV3ZW5ydW8uYnRyZnNAZ214LmNvbT6JAU4EEwEIADgCGwMFCwkI BwIGFQgJCgsCBBYCAwECHgECF4AWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCXZw1oQAKCRDC PZHzoSX+qCY6CACd+mWu3okGwRKXju6bou+7VkqCaHTdyXwWFTsr+/0ly5nUdDtT3yEVggPJ 3VP70wjlrxUjNjFb6iIvGYxiPOrop1NGwGYvQktgRhaIhALG6rPoSSAhGNjwGVRw0km0PlIN D29BTj/lYEk+jVM1YL0QLgAE1AI3krihg/lp/fQT53wLhR8YZIF8ETXbClQG1vJ0cllPuEEv efKxRyiTSjB+PsozSvYWhXsPeJ+KKjFen7ebE5reQTPFzSHctCdPnoR/4jSPlnTlnEvLeqcD ZTuKfQe1gWrPeevQzgCtgBF/WjIOeJs41klnYzC3DymuQlmFubss0jShLOW8eSOOWhLRuQEN BFnVga8BCACqU+th4Esy/c8BnvliFAjAfpzhI1wH76FD1MJPmAhA3DnX5JDORcgaCbPEwhLj 1xlwTgpeT+QfDmGJ5B5BlrrQFZVE1fChEjiJvyiSAO4yQPkrPVYTI7Xj34FnscPj/IrRUUka 68MlHxPtFnAHr25VIuOS41lmYKYNwPNLRz9Ik6DmeTG3WJO2BQRNvXA0pXrJH1fNGSsRb+pK EKHKtL1803x71zQxCwLh+zLP1iXHVM5j8gX9zqupigQR/Cel2XPS44zWcDW8r7B0q1eW4Jrv 0x19p4P923voqn+joIAostyNTUjCeSrUdKth9jcdlam9X2DziA/DHDFfS5eq4fEvABEBAAGJ ATwEGAEIACYCGwwWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCXZw1rgUJCWpOfwAKCRDCPZHz oSX+qFcEB/95cs8cM1OQdE/GgOfCGxwgckMeWyzOR7bkAWW0lDVp2hpgJuxBW/gyfmtBnUai fnggx3EE3ev8HTysZU9q0h+TJwwJKGv6sUc8qcTGFDtavnnl+r6xDUY7A6GvXEsSoCEEynby 72byGeSovfq/4AWGNPBG1L61Exl+gbqfvbECP3ziXnob009+z9I4qXodHSYINfAkZkA523JG ap12LndJeLk3gfWNZfXEWyGnuciRGbqESkhIRav8ootsCIops/SqXm0/k+Kcl4gGUO/iD/T5 oagaDh0QtOd8RWSMwLxwn8uIhpH84Q4X1LadJ5NCgGa6xPP5qqRuiC+9gZqbq4Nj Message-ID: <290f9ee7-1aed-2a92-bdba-063d238bd5bc@gmx.com> Date: Fri, 22 May 2020 09:32:54 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: <7541432.rVhWMRgfCE@puma> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="y9bgt3y0kI7qI6m5Eg9pz1OXJKtjP7XKR" X-Provags-ID: V03:K1:/tiryM2WXTbhImhoQA6C3ru70pb7eRE8oAFzxXMj1Ci3S7PX5Od wn3wPzKwnfmFcrOBRShVBd8yI+d8i4oi9vFid+n6pPOOaSItPghZQDkUlth6kAX5Xt9ZzFC ddsbokpUrhrwAfghrpmfUAR0jM3Kw9qkWcQoWH0fn0mSWQ6U3NUVzoer3gHMnP6xzK0tUZH KLSSgVjrlU/OnzkG34eiA== X-UI-Out-Filterresults: notjunk:1;V03:K0:fhyZnwYvY5c=:3WtRKIfzZvn0r0dje+GoEo +VHdxC1L7vbx1zYXZ9ob7Mk+A9yuiOHyVC1sVS57COclyEqZp+tkcyjq07xeDi+rdLnBdtrYa TsjhIK1N4AUAfYlU8THuJDpTuG5kxFqIuqZWDEWI1VnUkn/jIdSmaR7vbELnBN6ymGAVFHF2s 5tbhAfXr7Drl53oZCHbshd4fzweh4mmP13a60m5FPRIwSINmgjxLe+WKO8KevjKDXoXjfvhNU 9/usTb1GiTmqM2Ptmyw6sC7VEl/S01xEqyCsyNrTTQfCs0Q65piSeVxzbT1oNFM2yqGyPB3QG 2DeDSBlH3TfzcgG6zCvFTm+2T4isIQDKATbyJ2A7hM/UqDpM2Ddoa9cl3XmeJQirFOPNs4pTA m60LBKufs5tBcxrbJ1ShUqorSo92giacD/f0PemWOqx67IDnS4qmXcrxhe6EK011abtnr9tmX vZHfoERz9q+yf3Qst6rCgE0t4KrQzwerqnZxeftH8IkJ8fiYGH5Wc18v7sY47X2lQpAdmayNH D8pClyvjL/JpxbwaI0EA77Thf5E3bII+8IydfO0pYuA8zKrjFsNSlWPoE2r76dE2XFbQdYkCM LVjcBWXnL9msoO58wW55oy5U0M75P2DGhUfsvlfDjSUYnnj1Bub1YZGU+zW1hG19fTww56zJP GTxf1mjSu0l01Tv7RaqtmZ5Dv7ca0MG3/kNZNzFEDXjtP/QwbuAcViuwU3C3Fp4UsBIDXg3fD 4Ux+8mWRUBtAvcc61KPYu7aWGs3JF3TncHxas03kiBg4AESGqdSybz2THP409er7XeFFRsEXS 2oTfVbGGbLfO++FhCc4dAEOJLjjksXPMp4APY4JYPciMQ6IkBDQyc/M2/IUQLMPbFImelhgSO 04bKwi292QhcO43xzY08pWsvo0j5FLNQMIQVTSQFKjgX93zimnCnoz49ju4T96Lox1zVEnJ2I 5t59tlDojxpf8Z8G+kn3qIKEN+KTqR/PywA8zc8aQl3iUdldQEvclfKBiU7Q6/OHkxcPwLtPG qYJpBUtrX+bG+YyMMkIi1QFI1zl9Fr5hXyHL2VEK9XlRY45UwJ3pBpXWjmUPmtsxHpotSjwm8 AKfkVPZA+ImT7Sa09NjrbUkujUHc3vIO3PlebQjoTDTWjZYvHFmEOuFPtXyNRr0yryvHh2BoC L0uQXdgn5STucSL0ZCFtYmIrCSOjf4nA9v5+h1BwHbn22f37klIXS80dkWVPdR6kkzlQvVniH XaXrhXte11VNxtWtv Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --y9bgt3y0kI7qI6m5Eg9pz1OXJKtjP7XKR Content-Type: multipart/mixed; boundary="dZqL4mm5xy2PE11YFVU64Ougz9R6VvYLv" --dZqL4mm5xy2PE11YFVU64Ougz9R6VvYLv Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 2020/5/22 =E4=B8=8A=E5=8D=887:48, Pierre Abbat wrote: > On Thursday, May 21, 2020 3:56:01 AM EDT Qu Wenruo wrote: >> That doesn't sound good. But according to your btrfs check result, you= r >> memory doesn't look good. >> There seems to be a memory bit flip. >> >> A full memtest is highly recommended. >> >> And since your hardware is not functioning reliable, everything can go= >> wrong. >=20 > There was a thunderstorm. The power blinked twice within a few minutes.= That=20 > could have easily caused the bit flip. >=20 >>> UUID: 1f5a6f23-a7ef-46c6-92b1-84fc2f684931 >>> [1/7] checking root items >>> [2/7] checking extents >>> incorrect local backref count on 4186230784 root 257 owner 99013 offs= et >>> 5033684992 found 1 wanted 2097153 back 0x5589817e5ef0 >> >> Here, the 2097153 is 0x200001, it's an obvious bitflip. >> >> And since it's in extent tree, even write time tree checker can't dete= ct it. >> >> But that problem is not a big thing, btrfs check --repair can fix it. >> >> Still, memtest first, only process to try repair after your memory is = fixed. >=20 > "btrfs check" gave me a "device busy" error. (When I booted the M.2, th= is was=20 > caused by the hung mount process, but it happened even when I booted th= e flash=20 > drive. I don't know why.) I couldn't repair it. I had to get a new driv= e and=20 > recover the files to the new drive. >=20 > Trying to mount the corrupt filesystem consistently hangs. That indicat= es a bug=20 > in mount. How can I send you the corrupt filesystem so that you can deb= ug=20 > mount? Considering your btrfs check reports no serious problem, the hang looks strange. The remaining possibility is the log tree. You could try to boot using any liveCD with new enough kernel, then btrfs ins dump-super | grep log_root If the result is not 0, then try btrfs rescue zero-log, then try mount again. Thanks, Qu >=20 > Pierre >=20 --dZqL4mm5xy2PE11YFVU64Ougz9R6VvYLv-- --y9bgt3y0kI7qI6m5Eg9pz1OXJKtjP7XKR Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEELd9y5aWlW6idqkLhwj2R86El/qgFAl7HK8cACgkQwj2R86El /qhvSgf/VKpCOVkFJGAzRVJvPTWnQLMbqrdhawSzGBSjO/nR4s2YGlZ5ClRDQiYB FUVKjKen07ej9v0jb5mApNXQMx2X6YcURDknEvSgqwNHdMNmyFgPaXAMp37WDdMA FFA4spqtnzxVidhAhqrVF6D5RAS/7QYTLWwIU++Bg6On7bkm604FlOWS0ZKOZW4+ LLrOPD3HRP1C6cMC3NWDp9UO/EoK6tXiRPmw7E2YRjnBr8Ayc64cHL0Z7e7I/JcI i3pzZhcJWukM3EA+ZeQv9rJxDPDVQgtm5zEV1dN7fIX0j6Jdad8vTOlgjKiPxiut GsHwhQ0xynCoCwrB3T+/6yeoj+HdlA== =863N -----END PGP SIGNATURE----- --y9bgt3y0kI7qI6m5Eg9pz1OXJKtjP7XKR--