From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andreas Bluemle Subject: rbd: assertion failure in rbd_img_obj_callback() Date: Thu, 20 Jun 2013 10:40:04 +0200 Message-ID: <20130620104004.10574583@doppio> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="MP_/eT=m7S1JenMYNNuD/7XO4il" Return-path: Received: from port-212-202-108-184.static.qsc.de ([212.202.108.184]:34593 "EHLO mail.itxperts.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S935296Ab3FTIkJ (ORCPT ); Thu, 20 Jun 2013 04:40:09 -0400 Received: from itxmail.itxperts.de (qgate_dmz.itxperts.de [192.168.160.1]) by mail.itxperts.de (8.14.0/8.14.0) with ESMTP id r5K8fbiu020296 for ; Thu, 20 Jun 2013 10:41:37 +0200 Received: from doppio (doppio.itxperts.de [192.168.140.7]) by itxmail.itxperts.de (Postfix) with ESMTP id 9E77513F02 for ; Thu, 20 Jun 2013 11:43:12 +0200 (CEST) Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Ceph Development --MP_/eT=m7S1JenMYNNuD/7XO4il Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline Hi, when working on a large rbd image, I am hitting an assertion failure in rbd kernel module; the assertion is in rbd_img_obj_callback() rbd_assert(img_request != NULL); The test is a sequential write on an rbd image, format 1. The size of the image is 1 TByte, order is 22 (i.e. default object size). The code of the rbd (and libceph) kernel modules is from kernel.org, 3.10-rc6, running on a 3.0.80-0.5 kernel. The problem looks like the rbd_obj_request structure in question has been released already when processing of the reponse to the original request takes place. Please find attached some more details on this problem. Is this a known issue already? Best Regards Andreas Bluemle -- Andreas Bluemle mailto:Andreas.Bluemle@itxperts.de ITXperts GmbH http://www.itxperts.de Balanstrasse 73, Geb. 08 Phone: (+49) 89 89044917 D-81541 Muenchen (Germany) Fax: (+49) 89 89044910 Company details: http://www.itxperts.de/imprint.htm --MP_/eT=m7S1JenMYNNuD/7XO4il Content-Type: application/octet-stream; name=README.rbd_img_obj_callback-panic Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename=README.rbd_img_obj_callback-panic UGFuaWMgaW4gcmJkX2ltZ19vYmpfY2FsbGJhY2soKTogYXNzZXJ0aW9uIGZhaWx1cmUKCnN0YXRp YyB2b2lkIHJiZF9pbWdfb2JqX2NhbGxiYWNrKHN0cnVjdCByYmRfb2JqX3JlcXVlc3QgKm9ial9y ZXF1ZXN0KQp7CiAgICAgICAgc3RydWN0IHJiZF9pbWdfcmVxdWVzdCAqaW1nX3JlcXVlc3Q7CiAg ICAgICAgdTMyIHdoaWNoID0gb2JqX3JlcXVlc3QtPndoaWNoOwogICAgICAgIGJvb2wgbW9yZSA9 IHRydWU7CgogICAgICAgIHJiZF9hc3NlcnQob2JqX3JlcXVlc3RfaW1nX2RhdGFfdGVzdChvYmpf cmVxdWVzdCkpOwogICAgICAgIGltZ19yZXF1ZXN0ID0gb2JqX3JlcXVlc3QtPmltZ19yZXF1ZXN0 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