From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 13 Jul 2007 10:40:44 -0700 From: Andrew Morton Subject: Re: [PATCH 0/7] Sparsemem Virtual Memmap V5 Message-Id: <20070713104044.0d090c79.akpm@linux-foundation.org> In-Reply-To: References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: linux-mm@kvack.org, linux-arch@vger.kernel.org, Andy Whitcroft , Nick Piggin , Mel Gorman List-ID: On Fri, 13 Jul 2007 10:04:45 -0700 (PDT) Christoph Lameter wrote: > 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... gaah, I read linux-arch and linux-mm rather intermittently and I haven't even seen these yet. > Would it be possible to merge this for 2.6.23 (maybe late?). It would be nice to see a bit of spirited reviewing from the affected arch maintainers and mm people... There's already an enormous amount of mm stuff banked up and it looks like I get to hold onto a lot of that until 2.6.24. We seem to be spending too little time on the first 90% of new stuff and too little time on the last 10% of existing stuff. > 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