From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with ESMTP id 646DB6B01E3 for ; Mon, 5 Apr 2010 17:39:01 -0400 (EDT) Date: Mon, 5 Apr 2010 14:33:29 -0700 (PDT) From: Linus Torvalds Subject: Re: [PATCH 00 of 41] Transparent Hugepage Support #17 In-Reply-To: <4BBA53A0.8050608@redhat.com> Message-ID: References: <20100405120906.0abe8e58.akpm@linux-foundation.org> <20100405193616.GA5125@elte.hu> <20100405210133.GE21620@think> <4BBA53A0.8050608@redhat.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: Avi Kivity Cc: Chris Mason , Pekka Enberg , Ingo Molnar , Andrew Morton , Andrea Arcangeli , linux-mm@kvack.org, Marcelo Tosatti , Adam Litke , Izik Eidus , Hugh Dickins , Nick Piggin , Rik van Riel , Mel Gorman , Dave Hansen , Benjamin Herrenschmidt , Mike Travis , KAMEZAWA Hiroyuki , Christoph Lameter , Chris Wright , bpicco@redhat.com, KOSAKI Motohiro , Balbir Singh , Arnd Bergmann , "Michael S. Tsirkin" , Peter Zijlstra , Johannes Weiner , Daisuke Nishimura List-ID: On Tue, 6 Apr 2010, Avi Kivity wrote: > > Please run them in conjunction with Mel Gorman's memory compaction, otherwise > fragmentation may prevent huge pages from being instantiated. .. and then please run them in conjunction with somebody doing "make -j16" on the kernel at the same time, or just generally doing real work for a few days before hand. The point is, there are benchmarks, and then there is real life. If we _know_ some feature only works for benchmarks, it should be discounted as such. It's like a compiler that is tuned for specint - at some point the numbers lose a lot of their meaning. Linus -- 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