From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from baraddur.eliasprobst.eu ([78.47.157.163]:43904 "EHLO eliasprobst.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1946411AbbHGXa5 (ORCPT ); Fri, 7 Aug 2015 19:30:57 -0400 To: linux-btrfs@vger.kernel.org Date: Sat, 08 Aug 2015 01:29:57 +0200 Subject: Re: Lockup in BTRFS_IOC_CLONE/Kernel 4.2.0-rc5 References: <55C1C915.4070106@eliasprobst.eu> <20150807040119.GA8887@localhost.localdomain> Message-ID: <55C53F75.6060905@eliasprobst.eu> From: "Elias Probst" MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="FtNskrpX8eb0FpHihFM0RseUh6Eiu9gf5" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --FtNskrpX8eb0FpHihFM0RseUh6Eiu9gf5 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 08/07/2015 06:01 AM, Liu Bo wrote: > Could you do 'echo w > /proc/sysrq-trigger' to gather the whole hang ca= ll stack? 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). In case VGER will strip attachments of this size, I made it available as a pastebin here: https://bpaste.net/show/e5e0fd4bbb9f > Here's a quick patch that may address your problem, can you give it a s= hot after > getting sysrq-w output? Will rebuild now with your patch and keep you updated about the outcome. Thanks a lot again! - Elias --FtNskrpX8eb0FpHihFM0RseUh6Eiu9gf5 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 iQIcBAEBCgAGBQJVxT9/AAoJEILFEoJlEbrb7AQP/1HyH4dJeT+iqVjPZNSUPcBM /w8z7qomxH1u8bO8QDI/1sbGQ0mYxwLXxA79ZpM7czIFEEUYM+k8NnJsSHvQw61N 6fV2nabRt6LLyr+BKCe+oJjwbA7VuVrqlXG4FWQej/u0/8TmIJyVqSUayD+clI4p 8eGIWebAKCLqkepiB25mOFfSvurCCYXQ4Z10VsJWC0n/Ra+ZfA9bRbvYh50RBS4b 0R3sw/AUEfccWmsVQwLiJvRCVbP0vp6mQibKYLBR2jrmbgbgay6SIfEMyVVehwQt F6SnZr4duK8jsGQwe3WdYma0LWrW/AxvBl7zZG3vzChBeNQjS/ICvSH6pEsSgjMy bLixYZI3K1L74oPsB9yHj61QkqRV6GQoO03nq9ERu6aXxwiKapADEG6D6hbQ+Q3j 9WeVZHjb1cRFy4PljQBzbMQF5M0v9M7MVg8qD8W2iqydYP5Ig7mES1Ndo5RJjp7D rQoBjF2nnj3qMhP1mETMQcHILMGmXSjQ/CGairIll81Fu6mBAFt5PgGkVSOSbiSQ fIUP0187nKmsVbRkQhkcF1++oHP8B6pyBYAmtdM+B/KN6THXdfItNaFlbx+iKOLA vm7HUKJ1Th4YbQmJq5hhjSQkqAUgJeJJMoPiO6o5rBwpn4bmXR0/+zXGYoDIQSMd J6vBd/gA5H66sPkZ9Txt =OCyn -----END PGP SIGNATURE----- --FtNskrpX8eb0FpHihFM0RseUh6Eiu9gf5--