From: Niraj Kulkarni Subject: Re: [PATCH] jbd/jbd2: remove obsolete summarise_journal_usage. Date: Thu, 05 May 2011 21:48:34 +0530 Message-ID: <4DC2CDDA.2000406@gmail.com> References: <1304610859-480-1-git-send-email-tm@tao.ma> <20110505161454.GM5323@quack.suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Tao Ma , linux-ext4@vger.kernel.org To: Jan Kara Return-path: Received: from mail-pw0-f46.google.com ([209.85.160.46]:39764 "EHLO mail-pw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754994Ab1EEQUB (ORCPT ); Thu, 5 May 2011 12:20:01 -0400 Received: by pwi15 with SMTP id 15so1048980pwi.19 for ; Thu, 05 May 2011 09:20:00 -0700 (PDT) In-Reply-To: <20110505161454.GM5323@quack.suse.cz> Sender: linux-ext4-owner@vger.kernel.org List-ID: Hi, I have a question, if only one instance of kjournald is active at any time, and committing transaction is well separated from others, what is need of taking j_list_lock while operating on committing transaction's lists? Niraj