From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: Re: [PATCH 0/5] Sizing zones and holes in an architecture independent manner V7 Date: Wed, 7 Jun 2006 17:20:22 +0200 References: <20060606134710.21419.48239.sendpatchset@skynet.skynet.ie> <200606071216.24640.ak@suse.de> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200606071720.22242.ak@suse.de> Sender: owner-linux-mm@kvack.org Return-Path: To: Mel Gorman Cc: Andrew Morton , davej@codemonkey.org.uk, tony.luck@intel.com, bob.picco@hp.com, linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org, linux-mm@kvack.org List-ID: > Ok, while true, I'm not sure how it affects performance. The only "real" > value affected by present_pages is the number of patches that are > allocated in batches to the per-cpu allocator. It affects the low/high water marks in the VM zone balancer. Especially for the 16MB DMA zone it can make a difference if you account 4MB kernel in there or not. -Andi -- 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