Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755121AbWL3AeU (ORCPT ); Fri, 29 Dec 2006 19:34:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755122AbWL3AeU (ORCPT ); Fri, 29 Dec 2006 19:34:20 -0500 Received: from smtp.osdl.org ([65.172.181.25]:36234 "EHLO smtp.osdl.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755106AbWL3AeT (ORCPT ); Fri, 29 Dec 2006 19:34:19 -0500 Date: Fri, 29 Dec 2006 16:33:16 -0800 From: Andrew Morton To: Linus Torvalds Cc: Segher Boessenkool , David Miller , nickpiggin@yahoo.com.au, kenneth.w.chen@intel.com, guichaz@yahoo.fr, hugh@veritas.com, Linux Kernel Mailing List , ranma@tdiedrich.de, gordonfarquharson@gmail.com, a.p.zijlstra@chello.nl, tbm@cyrius.com, arjan@infradead.org, andrei.popa@i-neo.ro Subject: Re: Ok, explained.. (was Re: [PATCH] mm: fix page_mkclean_one) Message-Id: <20061229163316.020fcda1.akpm@osdl.org> In-Reply-To: References: <20061228114517.3315aee7.akpm@osdl.org> <20061228.143815.41633302.davem@davemloft.net> <3d6d8711f7b892a11801d43c5996ebdf@kernel.crashing.org> <20061229141632.51c8c080.akpm@osdl.org> <20061229155118.3feb0c17.akpm@osdl.org> X-Mailer: Sylpheed version 2.2.7 (GTK+ 2.8.6; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1112 Lines: 30 On Fri, 29 Dec 2006 16:11:44 -0800 (PST) Linus Torvalds wrote: > > > > JBD implements physical block-based journalling, so it is 100% appropriate > > that JBD deal with these disk blocks using their buffer_head > > representation. > > And as long as it does that, you just have to face the fact that it's > going to perform like crap, including what you call "extra" writes, and > what I call "deal with it". It is quite tiresome to delete things which your interlocutor said and to then restate them as if it were some sort of relevation. > > Somewhat nastily, but as ext3 directories are metadata it is appropriate > > that modifications to them be done in terms of buffer_heads (ie: blocks). > > No. There is nothing "appropriate" about using buffer_heads for metadata. I said "modification". > [stuff about directory reads elided] - 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/