From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: [PATCH 00/23] per device dirty throttling -v8 From: Arjan van de Ven In-Reply-To: <20070804202830.GA4538@elte.hu> References: <20070804063217.GA25069@elte.hu> <20070804070737.GA940@elte.hu> <20070804103347.GA1956@elte.hu> <20070804163733.GA31001@elte.hu> <46B4C0A8.1000902@garzik.org> <20070804191205.GA24723@lazybastard.org> <20070804192130.GA25346@elte.hu> <20070804211156.5f600d80@the-village.bc.nu> <20070804202830.GA4538@elte.hu> Content-Type: text/plain Date: Sat, 04 Aug 2007 13:34:04 -0700 Message-Id: <1186259644.2777.12.camel@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Ingo Molnar Cc: Alan Cox , J??rn Engel , Jeff Garzik , Linus Torvalds , 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 List-ID: > > People just need to know about the performance differences - very few > > realise its more than a fraction of a percent. I'm sure Gentoo will > > use relatime the moment anyone knows its > 5% 8) > > noatime,nodiratime gave 50% of wall-clock kernel rpm build performance > improvement for Dave Jones, on a beefy box. Unless i misunderstood what > you meant under 'fraction of a percent' your numbers are _WAY_ off. it's also a Watt or so of power if you have the AHCI ALPM patches in the kernel (which are pending mainline inclusion)... -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org