From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 13 Jul 2007 10:04:45 -0700 (PDT) From: Christoph Lameter Subject: Re: [PATCH 0/7] Sparsemem Virtual Memmap V5 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: akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-arch@vger.kernel.org, Andy Whitcroft , Nick Piggin , Mel Gorman List-ID: On Fri, 13 Jul 2007, Andy Whitcroft wrote: > Andrew, please consider for -mm. > > Note that I am away from my keyboard all of next week, but I figured > it better to get this out for testing. Yes grumble. Why does it take so long... Would it be possible to merge this for 2.6.23 (maybe late?). This has been around for 6 months now. It removes the troubling lookups in virt_to_page and page_address in sparsemem that have spooked many of us. virt_to_page efficiency is a performance issue for kfree and kmem_cache_free in the slab allocators. I inserted probles and saw that the patchset cuts down the cycles spend in virt_to_page by 50%. -- 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