Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757945Ab0BEEAB (ORCPT ); Thu, 4 Feb 2010 23:00:01 -0500 Received: from mail-ew0-f228.google.com ([209.85.219.228]:60202 "EHLO mail-ew0-f228.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757866Ab0BEEAA (ORCPT ); Thu, 4 Feb 2010 23:00:00 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=t2IswNc19YHQsM+2yPUNSNtYFOzqp67JpkMgxNWQYT9+cQFx5Se+7IeRX3bOwdYHg0 o22wsxcwZ7stHB44hUkRg/e80z5c+B1nU4F2nc52rhZuveQNui2XdzOZ1ivAJVvyszP0 81IXrLnnWmrvIFumfZm4JYfUIsaY/nbPLbAkY= Date: Fri, 5 Feb 2010 04:59:57 +0100 From: Frederic Weisbecker To: Alexander Beregalov Cc: Linux Kernel Mailing List Subject: Re: reiserfs deadlock Message-ID: <20100205035953.GB5408@nowhere> References: <20100203202909.GA5068@nowhere> <20100203225232.GI5068@nowhere> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 962 Lines: 28 On Fri, Feb 05, 2010 at 04:46:38AM +0300, Alexander Beregalov wrote: > Hi Frederic > > Does it help? Nope :-S I need the full stracktraces. Plus the fact a thread holds the reiserfs lock doesn't help much in this regard. This is a drawback of lockdep: "holding" a lock in such lock dump means either: the task holds the lock _or_ the task requests the lock and block on it. The only way to determine if a task really holds the reiserfs lock is to look at the stack trace and see if it blocks on reiserfs_write_lock_*() or something else. If this is something else, then it means it really holds it, and there are fair chances this is exactly the stacktrace we want: the one that raised the softlockup. Thanks! -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/