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,URIBL_BLOCKED,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 42E5CC3A5A3 for ; Tue, 27 Aug 2019 12:34:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 161A7206BF for ; Tue, 27 Aug 2019 12:34:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=gmx.net header.i=@gmx.net header.b="kO6qnE4F" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727864AbfH0Met (ORCPT ); Tue, 27 Aug 2019 08:34:49 -0400 Received: from mout.gmx.net ([212.227.15.18]:59391 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726125AbfH0Met (ORCPT ); Tue, 27 Aug 2019 08:34:49 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1566909286; bh=egx6QySEL9fLCqEeahcsFpMjr2Riy8HkM9VGsCH1TiQ=; h=X-UI-Sender-Class:Subject:To:Cc:References:From:Date:In-Reply-To; b=kO6qnE4FUnoi+jycYrukn83XdYSHiksRpmI5/sEAvshN1lYrq91X+jvF0taHkJ3Rb Te3vZPeaoSxEBYA4e2OCHF4v59OwHSvGcEvRgBr4ccqeBTl3OymP7z5FUH9LzBh3WA 5h/4EQL8QmC8+j37dWSwTS0gwYBs+LQO8WnJJmL8= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from [0.0.0.0] ([13.231.109.76]) by mail.gmx.com (mrgmx005 [212.227.17.184]) with ESMTPSA (Nemesis) id 1MJmGZ-1hmzbo44cb-00KB2b; Tue, 27 Aug 2019 14:34:46 +0200 Subject: =?UTF-8?Q?Re=3a_Re=c2=a0=3a_Massive_filesystem_corruption_since_ker?= =?UTF-8?Q?nel_5=2e2_=28ARCH=29?= To: "swami@petaramesh.org" , linux-btrfs@vger.kernel.org Cc: Christoph Anton Mitterer References: <11e4e889f903ddad682297c4420faeb0245414cf.camel@scientia.net> <18d24f2f-4d33-10aa-5052-c358d4f7c328@petaramesh.org> <5aefca34-224a-0a81-c930-4ccfcd144aef@petaramesh.org> <4bd70aa2-7ad0-d5c6-bc1f-22340afaac60@petaramesh.org> <370697f1-24c9-c8bd-01a7-c2885a7ece05@gmx.com> <209fcd36-6748-99c5-7b6d-319571bdd11f@petaramesh.org> <6525d5cf-9203-0332-cad5-2abc5d3e541c@gmx.com> <-z770dp-y45icx-naspi1dhhf7m-b1jjq3853x22lswnef-p5g363n8kd2f-vdijlg-jk4z4q-raec5-em5djr-et1h33i4xib8jxzw1zxyza74-miq3zn-e4azxaaeyo3abtrf6zj8nb18-hbhrrmnr1ww1.1566894946135@email.android.com> From: Qu Wenruo Openpgp: preference=signencrypt Autocrypt: addr=quwenruo.btrfs@gmx.com; prefer-encrypt=mutual; keydata= mQENBFnVga8BCACyhFP3ExcTIuB73jDIBA/vSoYcTyysFQzPvez64TUSCv1SgXEByR7fju3o 8RfaWuHCnkkea5luuTZMqfgTXrun2dqNVYDNOV6RIVrc4YuG20yhC1epnV55fJCThqij0MRL 1NxPKXIlEdHvN0Kov3CtWA+R1iNN0RCeVun7rmOrrjBK573aWC5sgP7YsBOLK79H3tmUtz6b 9Imuj0ZyEsa76Xg9PX9Hn2myKj1hfWGS+5og9Va4hrwQC8ipjXik6NKR5GDV+hOZkktU81G5 gkQtGB9jOAYRs86QG/b7PtIlbd3+pppT0gaS+wvwMs8cuNG+Pu6KO1oC4jgdseFLu7NpABEB AAG0IlF1IFdlbnJ1byA8cXV3ZW5ydW8uYnRyZnNAZ214LmNvbT6JAVQEEwEIAD4CGwMFCwkI BwIGFQgJCgsCBBYCAwECHgECF4AWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCWdWCnQUJCWYC bgAKCRDCPZHzoSX+qAR8B/94VAsSNygx1C6dhb1u1Wp1Jr/lfO7QIOK/nf1PF0VpYjTQ2au8 ihf/RApTna31sVjBx3jzlmpy+lDoPdXwbI3Czx1PwDbdhAAjdRbvBmwM6cUWyqD+zjVm4RTG rFTPi3E7828YJ71Vpda2qghOYdnC45xCcjmHh8FwReLzsV2A6FtXsvd87bq6Iw2axOHVUax2 FGSbardMsHrya1dC2jF2R6n0uxaIc1bWGweYsq0LXvLcvjWH+zDgzYCUB0cfb+6Ib/ipSCYp 3i8BevMsTs62MOBmKz7til6Zdz0kkqDdSNOq8LgWGLOwUTqBh71+lqN2XBpTDu1eLZaNbxSI ilaVuQENBFnVga8BCACqU+th4Esy/c8BnvliFAjAfpzhI1wH76FD1MJPmAhA3DnX5JDORcga CbPEwhLj1xlwTgpeT+QfDmGJ5B5BlrrQFZVE1fChEjiJvyiSAO4yQPkrPVYTI7Xj34FnscPj /IrRUUka68MlHxPtFnAHr25VIuOS41lmYKYNwPNLRz9Ik6DmeTG3WJO2BQRNvXA0pXrJH1fN GSsRb+pKEKHKtL1803x71zQxCwLh+zLP1iXHVM5j8gX9zqupigQR/Cel2XPS44zWcDW8r7B0 q1eW4Jrv0x19p4P923voqn+joIAostyNTUjCeSrUdKth9jcdlam9X2DziA/DHDFfS5eq4fEv ABEBAAGJATwEGAEIACYWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCWdWBrwIbDAUJA8JnAAAK CRDCPZHzoSX+qA3xB/4zS8zYh3Cbm3FllKz7+RKBw/ETBibFSKedQkbJzRlZhBc+XRwF61mi f0SXSdqKMbM1a98fEg8H5kV6GTo62BzvynVrf/FyT+zWbIVEuuZttMk2gWLIvbmWNyrQnzPl mnjK4AEvZGIt1pk+3+N/CMEfAZH5Aqnp0PaoytRZ/1vtMXNgMxlfNnb96giC3KMR6U0E+siA 4V7biIoyNoaN33t8m5FwEwd2FQDG9dAXWhG13zcm9gnk63BN3wyCQR+X5+jsfBaS4dvNzvQv h8Uq/YGjCoV1ofKYh3WKMY8avjq25nlrhzD/Nto9jHp8niwr21K//pXVA81R2qaXqGbql+zo Message-ID: <4aec59db-c4df-276e-28ca-586e8df89ad2@gmx.com> Date: Tue, 27 Aug 2019 20:34:41 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <-z770dp-y45icx-naspi1dhhf7m-b1jjq3853x22lswnef-p5g363n8kd2f-vdijlg-jk4z4q-raec5-em5djr-et1h33i4xib8jxzw1zxyza74-miq3zn-e4azxaaeyo3abtrf6zj8nb18-hbhrrmnr1ww1.1566894946135@email.android.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:bmPJ9DJZNjaFfcWU/GDbsS6roViaC2nEpsW7VqbvPmFeKLYcac1 m8x5GQPkZSy17MRzabwpu9SvTNcwH60f5j3dKQPlMhMY0H0b9KpUvtbDGQMBg5xmCjPRJ/O 7S1qb2amEe9OBbQoEnczBcXM2MfFYyPIDpl1Bc1v0QJ6Q+N2WXc8RMl48KZmbTDUo83JOjp w7yfhcgs8tWumSIvCOhPQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:Qp2tI+3b5w4=:m8NUnWmg9N/mdh/+Td59Z2 il3w9xN5niZmF7LFisq2YepRQ25AX25toulqDea1LNSWXbaF/NsO5RNoCXggaTgEMGr/7l3tX UJczjt22ImotWL3g7wv7OCUBk2OcH++YsiTEerp7YPBvB/kYl/f3Loc8LCEMrFNHWt268hSgD 69SPh/bQU+zeX9fErppCaYrieOxaLGc9ufk4RzRWuBhuo7Oiq1T+Qaerbg2hyrPWdJYC9HUHH cwWOHeTyrbFt506EUNhhNVP6Y84fb8EhSs2B2xsnuFh7UX9XukmU0q1tmOkuz+Z3mQvpZ4Lbu NPrWVC4JSbZauLBLvoKXmIni9LnrguixcT6Er9VZ3rTMz3Inh5AcOZKrb5+i5z1IqJBe8rbK6 oYPOTKzqUGg9w/TfVG+JImg7kytIce0UjnsKuj1BXzglvqNZq4HLCgohw8mBX9sV2UU39SDp2 47V/VkhlLqPYad7zwWryJZ5dmP67pVSP3fRVQUGEg/E5c4gqcxmTWyH8455SPwfZ2r24EkWBk pcUNlZFSw7jF7grE/zu6nZkKUAxUQWFVDG4AAYrRfOiF5FKMP/RxRPn8B0blES50KDl5S1B21 DJB61+LP4P0SxUSK7POhP/52JY3+5xwb7teXqsXxTdjOirCChJhYu1cq5WVZsnrNH8N7fAqCc 0p1jJTwkzQY9y3oG8yEQUN+WzcQsHNmp/DsVpge3eJhfBuEyv2R5WficSD55YM6GIsUHenR7z 4gFWVa4hKAlCAZLl50KjL9s6Wh3hD/MBiUyn1wTRqziwolxyVIbwEUpOF4+UKPR/v46W87oqT YnoSMbm3Tu00rr74PXnLRTrSQ/Vxa9/cixeNQtZ9P7rd5+jhAhl9SEyMC3L3KBZfaTi91G2Vl kohnv+NuT3r52sIoFDOaiaKofctK5o1xt7qz+2efFuU5Fka0vijjg+Yv/GO/Ik8/QClXcrKmd dLDHgo7s89SHNi91WW/BVGDdRagT7rFDI3qtZ/NPGzXXLx4LV6u/Wfg4/hJ6IzVsJ2HXnmeny X5jnWRqE8hkpqs0s87JYRMba+hF7t5GOpnxQe2buWj7W7LLPq+RcoKWqiXbiWzxic9TlSg6pa cAAVOyNL/YgZMOWL13WrHq5mkWrMsWoqzL0IyVQjSW26xdNZ5mr+Ff+NvNCjKc30T04XXiPc8 ygAhdj+eKpwZb1mTzZ4ptkt14tAtKLvprLw5j0LQSTQXcJ8A== Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 2019/8/27 =E4=B8=8B=E5=8D=884:35, swami@petaramesh.org wrote: > Hi Qu, > > Sorry for top-posting (my phone, uh...) > > I meant that I had understood that the V2 space cache was preferable to > V1 only for multi-TB filesystems. > > So would you advise to use V2 space cache also for filesystems < 1 TB ? Sorry, I'm not that familiar with space cache/tree code to do any recommendation based on code. My recommendation is, disable space cache if in doubt. Simple and straightforward. Thanks, Qu > > TIA. > > Kind regards. > > > > -------- Message original -------- > Objet=C2=A0: Re: Massive filesystem corruption since kernel 5.2 (ARCH) > De=C2=A0: Qu Wenruo > =C3=80=C2=A0: Sw=C3=A2mi Petaramesh ,linux-btrfs@vger.kernel.org > Cc=C2=A0: Christoph Anton Mitterer > > > > or to use the V2 space > > cache generally speaking, on any machine that I use (I had > understood it > > was useful only on multi-TB filesystems...) > > 10GiB is enough to create large enough block groups to utilize free > space cache. > So you can't really escape from free space cache. >