Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760931AbXHEUed (ORCPT ); Sun, 5 Aug 2007 16:34:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753632AbXHEUeZ (ORCPT ); Sun, 5 Aug 2007 16:34:25 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:34652 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753176AbXHEUeY (ORCPT ); Sun, 5 Aug 2007 16:34:24 -0400 Date: Sun, 5 Aug 2007 21:34:13 +0100 From: Christoph Hellwig To: Arjan van de Ven Cc: Theodore Tso , Linus Torvalds , J?rn Engel , Ingo Molnar , Jeff Garzik , Peter Zijlstra , linux-mm@kvack.org, Linux Kernel Mailing List , miklos@szeredi.hu, akpm@linux-foundation.org, neilb@suse.de, dgc@sgi.com, tomoki.sekiyama.qu@hitachi.com, nikita@clusterfs.com, trond.myklebust@fys.uio.no, yingchao.zhou@gmail.com, richard@rsk.demon.co.uk, david@lang.hm Subject: Re: [PATCH 00/23] per device dirty throttling -v8 Message-ID: <20070805203413.GA25107@infradead.org> Mail-Followup-To: Christoph Hellwig , Arjan van de Ven , Theodore Tso , Linus Torvalds , J?rn Engel , Ingo Molnar , Jeff Garzik , Peter Zijlstra , linux-mm@kvack.org, Linux Kernel Mailing List , miklos@szeredi.hu, akpm@linux-foundation.org, neilb@suse.de, dgc@sgi.com, tomoki.sekiyama.qu@hitachi.com, nikita@clusterfs.com, trond.myklebust@fys.uio.no, yingchao.zhou@gmail.com, richard@rsk.demon.co.uk, david@lang.hm References: <20070804163733.GA31001@elte.hu> <46B4C0A8.1000902@garzik.org> <20070804191205.GA24723@lazybastard.org> <20070804192130.GA25346@elte.hu> <20070804192615.GA25600@lazybastard.org> <1186258399.2777.8.camel@laptopd505.fenrus.org> <20070804214821.GC11150@thunk.org> <1186336878.2777.15.camel@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1186336878.2777.15.camel@laptopd505.fenrus.org> User-Agent: Mutt/1.4.2.3i X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 797 Lines: 17 On Sun, Aug 05, 2007 at 11:01:18AM -0700, Arjan van de Ven wrote: > > on the journalling side this would be one transaction (not 5 milion) > and... since inodes are grouped on disk, you can even get some better > coalescing this way... > > Wonder if we could do inode-grouping smartly; eg if we HAVE to write > inode X, also write out the atime-dirty inodes in range X-Y to X+Y > (where Y is some tunable) in the same IO.. We already have filesystems in the tree that do such advances things as inode writeback clustering for more than ten years :) - 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/