Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932072AbWE3EVJ (ORCPT ); Tue, 30 May 2006 00:21:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751476AbWE3EVJ (ORCPT ); Tue, 30 May 2006 00:21:09 -0400 Received: from smtp.osdl.org ([65.172.181.4]:15845 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S1751285AbWE3EVI (ORCPT ); Tue, 30 May 2006 00:21:08 -0400 Date: Mon, 29 May 2006 21:20:59 -0700 (PDT) From: Linus Torvalds To: Nick Piggin cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, mason@suse.com, andrea@suse.de, hugh@veritas.com, axboe@suse.de Subject: Re: [rfc][patch] remove racy sync_page? In-Reply-To: <447BB3FD.1070707@yahoo.com.au> Message-ID: References: <447AC011.8050708@yahoo.com.au> <20060529121556.349863b8.akpm@osdl.org> <447B8CE6.5000208@yahoo.com.au> <20060529183201.0e8173bc.akpm@osdl.org> <447BB3FD.1070707@yahoo.com.au> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 931 Lines: 26 On Tue, 30 May 2006, Nick Piggin wrote: > > I guess so. Is plugging still needed now that the IO layer should > get larger requests? Why do you think the IO layer should get larger requests? I really don't understand why people dislike plugging. It's obviously superior to non-plugged variants, exactly because it starts the IO only when _needed_, not at some random "IO request feeding point" boundary. In other words, plugging works _correctly_ regardless of any random up-stream patterns. That's the kind of algorithms we want, we do NOT want to have the IO layer depend on upstream always doing the "Right Thing(tm)". So exactly why would you want to remove it? Linus - 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/