From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Elder Subject: Re: rbd map command hangs for 15 minutes during system start up Date: Fri, 14 Dec 2012 10:46:26 -0600 Message-ID: <50CB57E2.10703@inktank.com> References: <50B7C788.6040404@inktank.com> <50B93FCA.2060801@inktank.com> <50BC2DE6.6050307@inktank.com> <50C65AE5.2050704@inktank.com> <50C774FD.9030107@inktank.com> <50C78D09.5050403@inktank .com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mail-ie0-f174.google.com ([209.85.223.174]:34156 "EHLO mail-ie0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756706Ab2LNQq2 (ORCPT ); Fri, 14 Dec 2012 11:46:28 -0500 Received: by mail-ie0-f174.google.com with SMTP id c11so6194622ieb.19 for ; Fri, 14 Dec 2012 08:46:28 -0800 (PST) In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Nick Bartos Cc: Sage Weil , Gregory Farnum , Josh Durgin , Mandell Degerness , "ceph-devel@vger.kernel.org" On 12/13/2012 01:00 PM, Nick Bartos wrote: > Here's another log with the kernel debugging enabled: > https://gist.github.com/raw/4278697/1c9e41d275e614783fbbdee8ca5842680f46c249/rbd-hang-1355424455.log > > Note that it hung on the 2nd try. Just to make sure I'm working with the right code base, can you confirm that you're using a kernel built with the equivalent of what's now in the "wip-nick-newer" branch (commit id 1728893)? Also, looking at this log I don't think I see any rbd debug output. Does that make sense to you? How are you activating debugging to get these messages? If it includes something like: echo module libceph +p > /sys/kernel/debug/dynamic_debug/control it might be that you need to also do: echo module rbd +p > /sys/kernel/debug/dynamic_debug/control This information would be helpful in providing some more context about what rbd is doing that's leading to the various messaging activity I seen in this log. Please send me a log with that info if you are able to produce one. Thanks a lot. -Alex