From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx106.postini.com [74.125.245.106]) by kanga.kvack.org (Postfix) with SMTP id 92DB36B004A for ; Tue, 13 Mar 2012 03:22:11 -0400 (EDT) Date: Tue, 13 Mar 2012 00:18:42 -0700 (PDT) Message-Id: <20120313.001842.1454669292182923878.davem@davemloft.net> Subject: Re: [PATCH 0/5] Persist printk buffer across reboots. From: David Miller In-Reply-To: References: <20120312.235002.344576347742686103.davem@davemloft.net> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: apenwarr@gmail.com Cc: akpm@linux-foundation.org, josh@joshtriplett.org, paulmck@linux.vnet.ibm.com, mingo@elte.hu, a.p.zijlstra@chello.nl, fdinitto@redhat.com, hannes@cmpxchg.org, olaf@aepfle.de, paul.gortmaker@windriver.com, tj@kernel.org, hpa@linux.intel.com, yinghai@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org From: Avery Pennarun Date: Tue, 13 Mar 2012 03:14:21 -0400 > On Tue, Mar 13, 2012 at 2:50 AM, David Miller wrote: >> The idea is that you call prom_retain() before you take a look at what >> physical memory is available in the kernel, and the firmware takes >> this physical chunk out of those available memory lists upon >> prom_retain() success. > > This sounds like exactly the API I would have wanted, however: > > 1) It's only available in arch/sparc so I can't test my patch if I try > to use it; > 2) There's nobody that calls it so it might not work; > 3) I don't understand the API so I'm not really confident that > reserving memory this way will actually prevent it from being seen by > the kernel. > > In short, I think I would screw it up. I'm only saying that you should design your stuff such that an architecture with such features could easily hook into it using this kind facility. -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org