From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 22 May 2007 17:00:05 -0700 (PDT) From: Christoph Lameter Subject: Re: [PATCH 0/8] Sparsemem Virtual Memmap V4 In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Andy Whitcroft Cc: linux-mm@kvack.org, linux-arch@vger.kernel.org, Nick Piggin , Mel Gorman List-ID: On Tue, 22 May 2007, Andy Whitcroft wrote: > I do not have performance data on this round of patches yet, but > measurements on the initial PPC64 implementation showed a small > but measurable improvement. Well the performance tests that I did on x86_64 showed a reduction of the performance of virt_to_page from 18us to 9us. So I think we are fine. > This stack is against v2.6.22-rc1-mm1. It has been compile, boot > and lightly tested on x86_64, ia64 and PPC64. Sparc64 as been > compiled but not booted. Can we get that into mm soon? There are potentially other arches that also may want to run their own vmemmap functions for this and I would like to have an easy way to tinker around with a 4M vmemmap size for IA64. -- 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