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 732D7C2D0C0 for ; Sat, 21 Dec 2019 12:00:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3043E2070C for ; Sat, 21 Dec 2019 12:00:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=gmx.net header.i=@gmx.net header.b="Qbnss1wz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726583AbfLUMAN (ORCPT ); Sat, 21 Dec 2019 07:00:13 -0500 Received: from mout.gmx.net ([212.227.17.21]:58457 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726098AbfLUMAM (ORCPT ); Sat, 21 Dec 2019 07:00:12 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1576929610; bh=mIb2hsHsHMVisoRTuuoW7heExGTPX0Xr9bSK6Qqc+UU=; h=X-UI-Sender-Class:Subject:To:References:From:Date:In-Reply-To; b=Qbnss1wzEGpaRGFpfuVSTjN1tjmWxpQtd/zoFps7vh52a451yrjtpNyVUCNOgDKpp NXXLCnV9CqI9cTeB8i1gMJcR49zH6ko4b4GNJp62lsl7tOhc4839ih2HFDpFFweWcp c6CKEovZ1j7LQ+hZo0IdpWnQtg40RVPrx7MmCnc4= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from [0.0.0.0] ([149.28.201.231]) by mail.gmx.com (mrgmx104 [212.227.17.174]) with ESMTPSA (Nemesis) id 1MZktj-1iCaUg1XfD-00Wq8c; Sat, 21 Dec 2019 13:00:10 +0100 Subject: Re: Kernel 5.4 - BTRFS FS shows full with about 600 GB Free ? To: =?UTF-8?Q?Sw=c3=a2mi_Petaramesh?= , "'linux-btrfs@vger.kernel.org'" References: <8bd55f28-2176-89f7-bd53-4992ccd53f42@petaramesh.org> 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: <81dec38b-ec8e-382e-7dfe-cb331f418ffa@gmx.com> Date: Sat, 21 Dec 2019 20:00:06 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.0 MIME-Version: 1.0 In-Reply-To: <8bd55f28-2176-89f7-bd53-4992ccd53f42@petaramesh.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:jWsMfWKT/d9Lzosg7TWw1ndtpXqDrj0QArYCnGrnkDNkYjc5LqG +Nr7dYmlw4ZEhakynJ47jgiZ0IgNzurmEz5V3GddG6YEb74oecFGX034b9+sJfyBpJd5iST NdQpZNSJtMNkECuPkahHuzo3tqygtLVEBGCW2G5GUtH3SbFzYj4fUz5i7/PKV9DwwAGpJjB 6vtETXKtAv7UtyzSwqT1g== X-UI-Out-Filterresults: notjunk:1;V03:K0:yQDBXi3nE0A=:UwhpqLrIaV5Q/gNLVoY0gB 9hZhPsIwU/IDzc/rv0QUwxnPf64UASGypcai/84EfQsRfUV9wwX+j1zz0GKzHtABnCBZUWxhl tcZs1nTozy3cyjRJiiGRoF9WbVBmr0TvhyPTiXrLOsagZ+qecqlUa/OgwiEvG8FaV7Qcgq9FY AQLIC+ua81QdGYIRaMs9jIsrdKl/EcCV6zSJyiUe7UnuTglmIzF9nu/NkKN4DPBefs755B6Q1 aBpOigI8Gld/MPiSdKxHlHAdyKD0epvTJotH2aRCyWVVHHvBxfYIjD2zKe3MQad7QRX0DXgh6 KyXCmqypFp1669cC6TfXDhzBnSbQIDm3CpELkupkS6LaKmbGyaHCNCYuPWcJPr67Q5bNexEeH AACBAqaA4cE810aJQXiXSOPFkI0TS/Qo72NcdNEPdkR+OSylt1aQUCcW4H8I9o/o0VqH6avjI uEuhGqtvFHPwTO1Mrn94cCdU/d+mUa7Slt7naSz16a0aS1jjJAvhnmj/56/CefRX5SGx3eA1G V8ZWyVIgSjc03uFMpzNM1nRZK/Bm5SJnJc5v6p9ro8whCkIwyFLtN93p1RxT1n+IYSrlYy+BO 0iI2jN1OeJ+NNH6kFzcNPfMCUUGJqm1cZWuYceHum4+LeGMiG7UxCB0WIKHgMdwBFvwDKp8tB ms2nx+qsQssMuKZ3Mj9bdyP77CyzPIzgPHECWagMHId8KjnJYUu543/rRy/ubXQMnuCUnEf2Y XnEZvBStDSsN8rqJdKqyGtp0cUTSCkXnM6eQ3t7l8XqL1DFpVZnAlm1XMIedDk5f/uq/uRxPq alHkR6FJAjHVKkDmDG08e9jK15G0pzaHzopErD7HHkJbYYa0QDXb/3UKzzQ6NS2iALA3oDDBB Dm4d8WuqvHbN95fu5+llxmoYmPbYkmMzbYbwiqMVhG8xFeBlX2FlSti/arciWVErg05eXvvA7 vWGCsbfwPnsuQb5idsbWMpfo2wCpX32lpp/6sHUrLjgwBcFgeQhHk2Ii8VSQQS3V64k1jVHr8 dlLgV8P7eTqBE1/4ecCdhd/EX6j3PZqNlDeXdcHBFd0URb7ppzKGQLBHB63OvCzE2/87UKvYW BCkTcMnhg8LyaV0cgoka6f1kM6HT3gDVIPTDqhEHJu0b+Ne/pI0IOXZ+r2Z1TxQ97YHRq7Yqs VvPlSoj8u5COYq8Ju7enog8KA/eeuOwDhnWjNam516ukXBKygx2aVfpowMzV6n3pvxST2NUrU 4zn1DFfkI95WUKz267uZNbqC++O32Jz3dQm3FpRUa/1x6L7jxORUKMpPt1To= Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 2019/12/21 =E4=B8=8B=E5=8D=886:59, Sw=C3=A2mi Petaramesh wrote: > Hi list, > > After writing files and snapshots WITHOUT errors on an external BTRFS FS > with 500+ GB of free space, using kernel 5.4.5-arch1-1, I dismount the > FS then remount it normally, and then it says the FS has 0 space free > left ! > > Checking the disk on another machine with > > [moksha ~]# uname -r > 5.4.2-1-MANJARO > > And... How can this be ? > > root@moksha:~# df -h /run/media/myself/MyVolume > Filesystem=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 S= ize=C2=A0 Used Avail Use% Mounted on > /dev/mapper/luks-xxxxxxxxx-yyyy-zzzz-tttt-wwwwwww=C2=A0=C2=A0 1,9T 1,2T= =C2=A0=C2=A0=C2=A0=C2=A0 0 100% > /run/media/myself/MyVolume A known regression introduced in v5.4. The new metadata over-commit behavior conflicts with an existing check in btrfs_statfs(). It is completely a runtime false behavior, and had *no* other bad effect. If you feel like to address it with off-tree patch, there is a quick patch to address it: https://patchwork.kernel.org/patch/11293419/ > > root@moksha:~# btrfs fi sh > Label: 'MyVolume'=C2=A0 uuid: xxxxxxxxx-yyyy-zzzz-tttt-wwwwwww > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Total devices 1 FS bytes used= 1.19TiB > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 devid=C2=A0=C2=A0=C2=A0 1 siz= e 1.82TiB used 1.20TiB path > /dev/mapper/luks-xxxxxxxxx-yyyy-zzzz-tttt-wwwwwww > > root@moksha:~# btrfs fi df /run/media/myself/MyVolume > Data, single: total=3D1.18TiB, used=3D1.18TiB > System, DUP: total=3D8.00MiB, used=3D160.00KiB > Metadata, DUP: total=3D7.00GiB, used=3D6.88GiB > GlobalReserve, single: total=3D512.00MiB, used=3D0.00B > > root@moksha:~# umount /run/media/myself/MyVolume > > root@moksha:~# btrfs check > /dev/mapper/luks-xxxxxxxxx-yyyy-zzzz-tttt-wwwwwww > Opening filesystem to check... > Checking filesystem on /dev/mapper/luks-xxxxxxxxx-yyyy-zzzz-tttt-wwwwwww > UUID: xxxxxxxxx-yyyy-zzzz-tttt-wwwwwww > [1/7] checking root items > [2/7] checking extents > [3/7] checking free space cache > [4/7] checking fs roots > > (Still running since a while, no errors...) Running a fsck is always a good behavior, although in this case, it shouldn't cause any corruption. Thanks, Qu > > TIA for any help. > > Kind regards. >