From mboxrd@z Thu Jan 1 00:00:00 1970 From: "H. Peter Anvin" Subject: Re: [sodaville] [RFC] [PATCH V2] Adding DTB to architecture independent vmlinux Date: Thu, 28 Oct 2010 09:38:29 -0700 Message-ID: <4CC9A705.3080806@linux.intel.com> References: <4CC6E491.7060304@gmail.com> <20101027110937.GD7822@angua.secretlab.ca> <4CC860EF.6060503@linux.intel.com> <4CC8C423.9050600@gmail.com> <20101028005754.GA27386@dvomlehn-lnx2.corp.sa.net> <4CC99441.4030307@linux.intel.com> <4CC9A66B.6070408@linutronix.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4CC9A66B.6070408-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org To: Sebastian Andrzej Siewior Cc: sodaville-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org, devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org List-Id: devicetree@vger.kernel.org On 10/28/2010 9:35 AM, Sebastian Andrzej Siewior wrote: > H. Peter Anvin wrote: >> How big are these blobs in the typical case? Padding to the page size > You usually pad the dtb by 1kib (-p 1024 in dtc). Converting all dtbs in > powerpc's tree leads to: > 991545 / 130 = 7627 bytes average. > So expanding to a page is a lot of memory, but it's pretty important to jettison unused DTBs. -hpa