From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from baraddur.eliasprobst.eu ([78.47.157.163]:46115 "EHLO eliasprobst.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751251AbbHPAF0 (ORCPT ); Sat, 15 Aug 2015 20:05:26 -0400 To: linux-btrfs@vger.kernel.org Date: Sun, 16 Aug 2015 02:04:27 +0200 Subject: Re: Lockup in BTRFS_IOC_CLONE/Kernel 4.2.0-rc5 References: <55C1C915.4070106@eliasprobst.eu> <20150807040119.GA8887@localhost.localdomain> <55C53F75.6060905@eliasprobst.eu> Message-ID: <55CFD38B.7000807@eliasprobst.eu> From: "Elias Probst" MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="BnPoiOmsIdQXjrsVu0eCMmTtBEtb5T6h7" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --BnPoiOmsIdQXjrsVu0eCMmTtBEtb5T6h7 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 08/08/2015 01:29 AM, Elias Probst wrote: > On 08/07/2015 06:01 AM, Liu Bo wrote: >> Could you do 'echo w > /proc/sysrq-trigger' to gather the whole hang c= all stack? >=20 > Thanks a lot for the feedback. Full call stack output is attached > (pasting inline makes no sense due to the size of 2423 lines/135k). >=20 > In case VGER will strip attachments of this size, I made it available a= s > a pastebin here: https://bpaste.net/show/e5e0fd4bbb9f >=20 >=20 >> Here's a quick patch that may address your problem, can you give it a = shot after >> getting sysrq-w output? >=20 > Will rebuild now with your patch and keep you updated about the outcome= =2E So far I've been unable to reproduce the lockup using your patch on 4.2.0-rc6. Thanks a lot! - Elias --BnPoiOmsIdQXjrsVu0eCMmTtBEtb5T6h7 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCgAGBQJVz9OUAAoJEILFEoJlEbrbInwP/08lWloC30cRSe9IHGh8Hcn0 j4jAe2kr7k6kvdSGEGa7hGR9KcE66J2MC1qcXWHMaeaTJMaxb8HPQ3WaCYu3/sLU Iv9SGtlMIEP+XV0xvgFuxW0w59yAuKDQoKf4T7OrcZUhZ/rMMMnRkjRl/VO8roMh mcgS/DJD1aAwp6QjSFVJYmxkaoavWj4kVMTOOCcS6ivH37C521JbOfPB1Ma1ZCXs 2HaybHcsM8LtYRlFW/wJnhYzPcx/oMs0/sQk0VcCMfWEPv0w/Zd9EKZO47K28MY3 j7MuS2nBVgEaT3YDRLjVLBqnXDFr21JjJ+z3KGKyHq00BD3UUK7zuj39ODXAH0HW MU3brEMBE8KeEXDGkxPrAY0tAel76alwdW61UEa94W6mqSZ5QIFwHcySFg/eyRdi LHmqxx+nb5NWMyqJ/rGVhVbRra1bdtcLP+1MSZ5Sir0UwWqv97JlxqnKA25prABa 0MyBJRAOv5njnIqDpmDvTJn+Y/5b2XlRnW000aYZzFqbOQK/Qld3FxUpWr43pGge xM7pA0g7AaiQEI62J4SPXXYMN+VrIpgG4B1rzsrB0J4983gcbOIpEZxkjyYmze0I 4u8qvU4JPrS+VfSBx+gtY4Nqm92+sptPRFSZMT93UvdjyPARyru3HH5QSpQS1Dev 5M2iA1QCkCAizXWuyv5Y =T6U7 -----END PGP SIGNATURE----- --BnPoiOmsIdQXjrsVu0eCMmTtBEtb5T6h7--