From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 2 Mar 2007 09:07:53 -0800 From: Andrew Morton Subject: Re: The performance and behaviour of the anti-fragmentation related patches Message-Id: <20070302090753.b06ed267.akpm@linux-foundation.org> In-Reply-To: <20070302162023.GA4691@linux.intel.com> References: <20070301101249.GA29351@skynet.ie> <20070301160915.6da876c5.akpm@linux-foundation.org> <45E7835A.8000908@in.ibm.com> <20070301195943.8ceb221a.akpm@linux-foundation.org> <20070302162023.GA4691@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: mgross@linux.intel.com Cc: Linus Torvalds , Balbir Singh , Mel Gorman , npiggin@suse.de, clameter@engr.sgi.com, mingo@elte.hu, jschopp@austin.ibm.com, arjan@infradead.org, mbligh@mbligh.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: On Fri, 2 Mar 2007 08:20:23 -0800 Mark Gross wrote: > > The whole DRAM power story is a bedtime story for gullible children. Don't > > fall for it. It's not realistic. The hardware support for it DOES NOT > > EXIST today, and probably won't for several years. And the real fix is > > elsewhere anyway (ie people will have to do a FBDIMM-2 interface, which > > is against the whole point of FBDIMM in the first place, but that's what > > you get when you ignore power in the first version!). > > > > Hardware support for some of this is coming this year in the ATCA space > on the MPCBL0050. The feature is a bit experimental, and > power/performance benefits will be workload and configuration > dependent. Its not a bed time story. What is the plan for software support? Will it be possible to just power the DIMMs off? I don't see much point in some half-power non-destructive mode. -- 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