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=-1.0 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 5C492C43387 for ; Mon, 14 Jan 2019 05:39:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2D98620660 for ; Mon, 14 Jan 2019 05:39:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726092AbfANFj5 (ORCPT ); Mon, 14 Jan 2019 00:39:57 -0500 Received: from mout.gmx.net ([212.227.17.22]:55289 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725910AbfANFj5 (ORCPT ); Mon, 14 Jan 2019 00:39:57 -0500 Received: from [0.0.0.0] ([210.140.77.29]) by mail.gmx.com (mrgmx101 [212.227.17.174]) with ESMTPSA (Nemesis) id 0MPppG-1gf5Uf0WdW-0055EN for ; Mon, 14 Jan 2019 06:39:56 +0100 To: "linux-btrfs@vger.kernel.org" From: Qu Wenruo Subject: [REGRESSION] Super slow balance in v5.0-rc1 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: Date: Mon, 14 Jan 2019 13:39:46 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="NDX9XXnkXffln5xu0wS2KqzPDjxQy7hnJ" X-Provags-ID: V03:K1:NBzSgqOXLe9SYYhhFE0bWAocD22LrR9hgYv+qWag6lCId2ncSMi ZOQXnfDKJBp3YgRf8ILSZPjBT2jHCvy7CYIphxMsWgfAVjv/hBKZir9q+7iACUOJkoEXTjX a4m+n+EKO2FWJD72NwncIjj8Hx8CaxZuyZwm7CwiTzs0PeQQfgZbuLw2BSJ2EO7ObckqZ6W t7n0LScxeIMGj9f9pDlBQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:V2gP8tu+udw=:FON0LGjfS0GP7C09ijsHLC i/Kh56qiD/Kb6ziph5yPbI4AH2Q2lOYPHvVeMxQ+2YXXYUqF3O8Yv84bonoODoMlU0WqRburP vj82JVo/8Yd+8vLlDYNLJfs84ZcdSt7Y057dRcx48POU2VTT62Vmj8Xwp7nZR+IL+lGVFEioN 78af+BcZ2tyWqViwp4eqvGCUGJ3OD8AZOtZ4Wp0l8dMwM3dUW16aSpvZzw6rZF6iY7qLUWcAe hdSFYQKc9laiHJsRfBHm5M4J8b8uwUliqNacxZ7ai0gpGcmYS/HuSX4pwRUwnTn2BFHi3IsJJ VlhGnosG7+GT3uExqBBfwrHE5/PZ/wLfMf57beo3L7D6WlF7X02XqJJdtXCrKoQT+jXgI7f9H p/RCnIjmjUVngKjddTsQQdwGQNhmRc2AEbla7o9Rug7LuXwiWmoBTvZULrMyioBLVdFikdybZ 5c0QY9WreX55xPxqCUnBCBLFx+UyCAinsHLZesjGELAdEUxADbqpgscfQ5rtEuExSnpkDsbPV NHeZOfYAMOGDOtiUM2qdnFAzejckEV/+kNdRLsPn9lMT/EWPiECJcyM971x7dO6jxNLj+VHmZ unapeTgg2CmImZQGZK2icLV5E6fmhEb0qopVq0Elkxohksx13osv1zeGibqCvXro+X5iXECOd npzm3/PGsQynf4YxUsKuSVNWaMs0rzmlRBWs6rf+ktk4wuKDfCc9X3g9As7QZFFA7M2YqUpnM yvaioQQvMcDNU1kTY6ccEZFmE4drFTEmZXX8nHm5AZIoh5RffPfUnV+uMc+Oc5gwMqazQcZ37 eRHD3zfJqK3wDrD5gskrawikWwYBwSc9Bt/mNNmfDZx2X4Q2lHYKqZ1h97NWRsRhqmo+jNeEz Y98DvXd3J0E1m+1Oecm7mYuelXyKgk9BYi60IMR5Oh3FsQvKIiBcVBe7T3Z0AA 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) --NDX9XXnkXffln5xu0wS2KqzPDjxQy7hnJ Content-Type: multipart/mixed; boundary="WUihtgO6F7xwm3Q7qpFhbEVVURK06s2Lk"; protected-headers="v1" From: Qu Wenruo To: "linux-btrfs@vger.kernel.org" Message-ID: Subject: [REGRESSION] Super slow balance in v5.0-rc1 --WUihtgO6F7xwm3Q7qpFhbEVVURK06s2Lk Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable Hi, When rebasing my qgroup + balance optimization patches, I found one very obvious performance regression for balance. For normal 4G subvolume, 16 snapshots, balance workload, v4.20 kernel only takes 3s to relocate a metadata block group, while for v5.0-rc1, I don't really know how it will take as it hasn't finished yet. And the most important part is, this happens when quota is *DISABLED*!!! I'm bisecting for this regression, but if there are some users trying latest rc kernel, please be aware of this regression. Thanks, Qu --WUihtgO6F7xwm3Q7qpFhbEVVURK06s2Lk-- --NDX9XXnkXffln5xu0wS2KqzPDjxQy7hnJ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEELd9y5aWlW6idqkLhwj2R86El/qgFAlw8IKIACgkQwj2R86El /qgcmwf+PMWBLXyA/msf2BMLNO9MbZKkLVswLcHU2GVM43Heu/sUptx5McF9lOOJ EBGpejGbg77Y2mTfh6YOyByuwviVnwsfYMHcBICI5Sr2lFhKqNCAtCQTPLBcrSZb qB7c+1W0MYwC41cZje+mVuQkKq/ueN35KEL0PaZmndPYmNvdOJVlgflTFiAhgo+o 32QWWO5WSAXdi/Z+O+E3DUsWAap/TEW21VYZB0v8oH+aZo7zUkBWNZV8jnDoXQfs eyb7ln306dPViAlloCRegxvhWJadJmDAT1ZEerzRQ0ZPGk185loUOUrrrcej/1SQ FBceVWGM4g7eckQngT8ee5mVQA1ayA== =5fXg -----END PGP SIGNATURE----- --NDX9XXnkXffln5xu0wS2KqzPDjxQy7hnJ--