From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net ([212.227.15.18]:63768 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751241AbcLEOnT (ORCPT ); Mon, 5 Dec 2016 09:43:19 -0500 Received: from thetick.localnet ([93.181.44.247]) by mail.gmx.com (mrgmx002 [212.227.17.190]) with ESMTPSA (Nemesis) id 0MVN0w-1cB1ty0166-00YlGK for ; Mon, 05 Dec 2016 15:43:16 +0100 From: Marc Joliet To: linux-btrfs@vger.kernel.org Subject: [SOLVED] Re: system hangs due to qgroups Date: Mon, 05 Dec 2016 15:43:07 +0100 Message-ID: <4448819.RKs36le3Tk@thetick> In-Reply-To: <29619565.vvZbx4DoIQ@thetick> References: <1776088.42rHLKPlSp@thetick> <5f35cc2d-4c3d-b14c-01f6-4bfb0f22823b@cn.fujitsu.com> <29619565.vvZbx4DoIQ@thetick> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1864353.K2cZk1cxfk"; micalg="pgp-sha256"; protocol="application/pgp-signature" Sender: linux-btrfs-owner@vger.kernel.org List-ID: --nextPart1864353.K2cZk1cxfk Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" On Monday 05 December 2016 12:01:28 Marc Joliet wrote: > > This seems to be a NULL pointer bug in qgroup relocation fix. > > > >=20 > > > > The latest fix (not merged yet) should address it. > > > >=20 > > > > You could try the for-next-20161125 branch from David to fix it: > > https://github.com/kdave/btrfs-devel/tree/for-next-20161125 >=20 > OK, I'll try that, thanks! I just have to wait for it to finish clon= ing... >=20 [...] > > And for your recovery, I'd suggest to install an Archlinux into a U= SB > > HDD or USB stick, and compile David's branch and install it into th= e USB > > HDD. > > > >=20 > > > > Then use the USB storage as rescue tool to mount the fs, which shou= ld do > > RW mount with or without skip_balance mount option. > > So you could disable quota then. >=20 > OK, I'll try that, thanks! Excellent, thank you, that worked! My laptop is working normally again= . I'll=20 keep an eye on it, but so far two balance operations ran normally (that= is,=20 they completed within a few minutes and without hanging the system). (Specifically, since I didn't find out how to get a different kernel on= to the=20 Arch USB stick, I simply installed the kernel on my desktop, then did=20= everything from an initramfs emergency shell, then moved the SSD back i= nto the=20 laptop.) Thanks, everyone! =2D-=20 Marc Joliet =2D- "People who think they know everything really annoy those of us who kno= w we don't" - Bjarne Stroustrup --nextPart1864353.K2cZk1cxfk Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part. Content-Transfer-Encoding: 7Bit -----BEGIN PGP SIGNATURE----- iQIcBAABCAAGBQJYRXz7AAoJEL/Q5oYsiHj09X4P/14RuHc/WEXs8eqbKpPGb4N4 nIATTgLI2ymjYW7LDrlwdsZw/0A1alJrGsM3iBvGTouJWWTynDyQfSbjgraIzuJu C0qbU+Mtf8YQQlpHbsx8XDYFCCHwhCN5ePd98xusQe42Fn31Bwt+yGtXJ67DNZEG 9pz2uqE3mshIx9D9zZlrTPUr+QKemj7262HOOyNWCljmhE2uh3h6ISBTghxvKKZz sY+c1xllaG8k9Ygk+83wsfdtpY2beg7Ca7xYeY6DrtiOwG/Fiqjenmh+dNUm2283 nlzGNKTfilz1p75R9J2LOz6Zh9G1UzH+r9OdaGo+ocVpB2KR+FwwujO0fxp4ZXAn ISbarIxRBZTwZtnGpfwQkqOMchEI/QWjBm0Fp5mttACGIGeToA4xTnZLwPTUN5l6 Zo7DJhg4mpiuAmXo9NUYTo3FE3bzukcy0yqgj+eGsXC6ItIe36zCkGrqBVhFm/Ac Gq+NobCkT3x7buAadQSYjHF7/3a98ZJDAhDSAxDIw4oCZOLO02oCFdpmsko/zNQr ddMTzcW4RhWJJunA7XOcfXA9Ly1aE7ZTinfIRpJAfhiZvqU6DEaZkFzB4L0F1osv G2Tf92ZSuCKJ/DNm/cpHveyCSayycX/noB9Q+n8lCysKX6eTq4qVVCIUP0IkiZ7o SNsqBDZTuuLcUExbnoaa =aQQw -----END PGP SIGNATURE----- --nextPart1864353.K2cZk1cxfk--