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=-0.5 required=3.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 C1422C6787C for ; Sun, 14 Oct 2018 11:31:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 75F4F2077C for ; Sun, 14 Oct 2018 11:31:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 75F4F2077C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gmx.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-btrfs-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726467AbeJNTML (ORCPT ); Sun, 14 Oct 2018 15:12:11 -0400 Received: from mout.gmx.net ([212.227.17.21]:49529 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726265AbeJNTML (ORCPT ); Sun, 14 Oct 2018 15:12:11 -0400 Received: from [0.0.0.0] ([210.140.77.29]) by mail.gmx.com (mrgmx101 [212.227.17.174]) with ESMTPSA (Nemesis) id 0M20Jj-1fMQqE20OB-00u17c; Sun, 14 Oct 2018 13:31:18 +0200 Received: from [0.0.0.0] ([210.140.77.29]) by mail.gmx.com (mrgmx101 [212.227.17.174]) with ESMTPSA (Nemesis) id 0M20Jj-1fMQqE20OB-00u17c; Sun, 14 Oct 2018 13:31:18 +0200 Subject: Re: BTRFS bad block management. Does it exist? To: waxhead@dirtcellar.net, Btrfs BTRFS References: <42b1965a-356c-25c9-8c49-788a9a8a11aa@dirtcellar.net> From: Qu Wenruo Openpgp: preference=signencrypt Autocrypt: addr=quwenruo.btrfs@gmx.com; prefer-encrypt=mutual; keydata= xsBNBFnVga8BCACyhFP3ExcTIuB73jDIBA/vSoYcTyysFQzPvez64TUSCv1SgXEByR7fju3o 8RfaWuHCnkkea5luuTZMqfgTXrun2dqNVYDNOV6RIVrc4YuG20yhC1epnV55fJCThqij0MRL 1NxPKXIlEdHvN0Kov3CtWA+R1iNN0RCeVun7rmOrrjBK573aWC5sgP7YsBOLK79H3tmUtz6b 9Imuj0ZyEsa76Xg9PX9Hn2myKj1hfWGS+5og9Va4hrwQC8ipjXik6NKR5GDV+hOZkktU81G5 gkQtGB9jOAYRs86QG/b7PtIlbd3+pppT0gaS+wvwMs8cuNG+Pu6KO1oC4jgdseFLu7NpABEB AAHNIlF1IFdlbnJ1byA8cXV3ZW5ydW8uYnRyZnNAZ214LmNvbT7CwJQEEwEIAD4CGwMFCwkI BwIGFQgJCgsCBBYCAwECHgECF4AWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCWdWCnQUJCWYC bgAKCRDCPZHzoSX+qAR8B/94VAsSNygx1C6dhb1u1Wp1Jr/lfO7QIOK/nf1PF0VpYjTQ2au8 ihf/RApTna31sVjBx3jzlmpy+lDoPdXwbI3Czx1PwDbdhAAjdRbvBmwM6cUWyqD+zjVm4RTG rFTPi3E7828YJ71Vpda2qghOYdnC45xCcjmHh8FwReLzsV2A6FtXsvd87bq6Iw2axOHVUax2 FGSbardMsHrya1dC2jF2R6n0uxaIc1bWGweYsq0LXvLcvjWH+zDgzYCUB0cfb+6Ib/ipSCYp 3i8BevMsTs62MOBmKz7til6Zdz0kkqDdSNOq8LgWGLOwUTqBh71+lqN2XBpTDu1eLZaNbxSI ilaVzsBNBFnVga8BCACqU+th4Esy/c8BnvliFAjAfpzhI1wH76FD1MJPmAhA3DnX5JDORcga CbPEwhLj1xlwTgpeT+QfDmGJ5B5BlrrQFZVE1fChEjiJvyiSAO4yQPkrPVYTI7Xj34FnscPj /IrRUUka68MlHxPtFnAHr25VIuOS41lmYKYNwPNLRz9Ik6DmeTG3WJO2BQRNvXA0pXrJH1fN GSsRb+pKEKHKtL1803x71zQxCwLh+zLP1iXHVM5j8gX9zqupigQR/Cel2XPS44zWcDW8r7B0 q1eW4Jrv0x19p4P923voqn+joIAostyNTUjCeSrUdKth9jcdlam9X2DziA/DHDFfS5eq4fEv ABEBAAHCwHwEGAEIACYWIQQt33LlpaVbqJ2qQuHCPZHzoSX+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: Date: Sun, 14 Oct 2018 19:31:13 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.0 MIME-Version: 1.0 In-Reply-To: <42b1965a-356c-25c9-8c49-788a9a8a11aa@dirtcellar.net> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="cJ6AjUgTOiPJ63ZrrsRGo580qO0VkoVFx" X-Provags-ID: V03:K1:bYJ4seCBkGWqHIioYdoPd4yEO0VmpGXaqvdFK0n4C5Gnbv3QxRt PelBrwLZsZYPn3jT5v0K+B0hbpq8HsEGMoxNUKvOQ8mnvQ+FoWVSv9R7sG9FVDNOMwgH5Gl TXHDZyDpNYK3e9kaAgDpMnvaazYGdRF0FX63L0+qmiNGtoPp8yXWOxGurPeP6yg5bAber9u 4ECEC/6Q3C7Qvr8GaXX0w== X-UI-Out-Filterresults: notjunk:1;V01:K0:HRWw1xiqAJQ=:AVlpQp0QG76yiUZB+UstBZ +hCHTsw56AxNHP+W3+d6LeyGW+eEfshI8a8QeUjvj9q66SKi91ngG8/wzWklfJJ499x2gI4Nm cgRSknqaYzJnGH5T7FtNDrMDyOib4OPyGjAB3bwV7QV3J4sVd73y6wFPAJbPzSTdOG2mSQkxC SvBYU9p58L+ukZnCbavNaUIi43uYo8tm0DnM4Hf7BUBfk6m4jXbme8QeGyW6epUyg4ryzF0Oh BgFVZhIr0sKJZSEqoKHx9aAf4J+RfoPkO8mBwMazrNqh1UobGxR8US4l0dm4Q36iRzkVl6TS+ /L5IeEsqYdhrt9bRFLGexVDzixmIwpsmEBr/oiCz63Zf2uGdnZWCzyfzoEiA/Y3g8IHIaiNxP hIGtq10ILHfXvvyJsN5oyoEWjqqjo13JzQJ1zs/3D3J9WBhz068Xd1lws+CvugS/t5WsHWShI J2PjOf0zSuDMLt+a8Hn1xc+QPigKYdQdbZO/sFoRiRIX61I91ZIYvtCNT7uxdnpScl9YWTzke HjgVKxndTqcKwNG3lkSra5toj9y+qYYM1OQqTw7iCvZdzR0aP3UnyGiN2rJfys2RtRXyLgWno STE5MuAH2OhY1nrA6zyOFVcEiJ1xrQW0pt61dVQ0ZrsWRrhsjWVTOSeIAlHDbXl/+duB7gBRZ /lRheK9RFUPZYpRn2bbbyGyC81U2ufwku43xrvUSephFUnvkRRwSR7h6KxRcqPl1a6BuE8M59 sC1GVaiG4ZIZXD+MBrMFAlERpsvCQRJu+xL6h+vC0s2fOokmut5Q7M5h7yn/dpPt9dttMP1l1 c2e9tSKR3tEY/wGHZnZqkwW63Dfaw== 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) --cJ6AjUgTOiPJ63ZrrsRGo580qO0VkoVFx Content-Type: multipart/mixed; boundary="tZziZzNt5BtexTGpNjDa15lvutVdXDFaa"; protected-headers="v1" From: Qu Wenruo To: waxhead@dirtcellar.net, Btrfs BTRFS Message-ID: Subject: Re: BTRFS bad block management. Does it exist? References: <42b1965a-356c-25c9-8c49-788a9a8a11aa@dirtcellar.net> In-Reply-To: <42b1965a-356c-25c9-8c49-788a9a8a11aa@dirtcellar.net> --tZziZzNt5BtexTGpNjDa15lvutVdXDFaa Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 2018/10/14 =E4=B8=8B=E5=8D=887:08, waxhead wrote: > In case BTRFS fails to WRITE to a disk. What happens? Normally it should return error when we flush disk. And in that case, error will leads to transaction abort and the fs goes RO to prevent further corruption. > Does the bad area get mapped out somehow? No. > Does it try again until it > succeed or until it "times out" or reach a threshold counter? Unless it's done by block layer, btrfs doesn't try that. > Does it eventually try to write to a different disk (in case of using > the raid1/10 profile?) No. That's not what RAID is designed to do. It's only allowed to have any flush error if using "degraded" mount option and the error is under tolerance. Thanks, Qu --tZziZzNt5BtexTGpNjDa15lvutVdXDFaa-- --cJ6AjUgTOiPJ63ZrrsRGo580qO0VkoVFx Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEELd9y5aWlW6idqkLhwj2R86El/qgFAlvDKQEACgkQwj2R86El /qjJaggApUDK+57bQA6NQQ/xMAnNIibRhGBn0f2k3WyCljC0qLMZ0CNtmu1CCG8I xf8IE1LJLVc/fMFAzGDxFrnZkhk0RaCbGba6yymiuHcI8L+nJIRwabiUxm3xO6wB 7+FiR7qaT0LiSjMwrTzewm+wIkUJX9xL/dn00oXyzp+05a/y74tJIkmtvCCTtoq5 7pjy3XijVXOKwtorY3JmhAbOCwUbzGtR0JVr1mfNLn+9XQN6tCQkxlraM/iuYHk+ 7j5xie8qZwpdikmMXXl8jjnx2HQjx/zbwwvnGgf9JKW+m4o5WPqUpMPQ7VyaTHp0 jG7iHCE9aS4E/TcVGvXJK90cnltEjw== =AFKZ -----END PGP SIGNATURE----- --cJ6AjUgTOiPJ63ZrrsRGo580qO0VkoVFx--