From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with SMTP id CD76F6B0096 for ; Mon, 4 May 2009 08:26:55 -0400 (EDT) Message-Id: <82459C1E-87E6-497C-8D09-21FD5FA5709E@marksmachinations.com> From: Mark Brown In-Reply-To: <49FED524.9020602@gmail.com> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v930.3) Subject: Re: Memory Concepts [+Newbie] Date: Mon, 4 May 2009 08:28:43 -0400 References: <49FED524.9020602@gmail.com> Sender: owner-linux-mm@kvack.org To: Marcos Roriz Cc: kernelnewbies@nl.linux.org, linux-mm@kvack.org List-ID: Hi Marcos, A memory bank for RAM is just an individual addressable array on a memory board. The addressing of the bank is managed by the memory controller. Regards, -- Mark On May 4, 2009, at 7:44 AM, Marcos Roriz wrote: > I'm reading Mel Gorman Understating the Linux Virtual Memory Manager > and also TANENBAUM Modern Operating System I don't get some basic > concepts of the Memory Management in Linux Kernel. > > The first question is, what is a memory bank, It's not clear if its > a physical section of the memory of if its a chip (physical) itself. > > The ZONE_NORMAL zone refer only to kernel direct memory mapped, that > means only to kernel pages and kernel programs (such as daemons)? > > Why is the ZONE_NORMAL so large (896 MB)? How to deal with low > memory systems? > > The ZONE_HIGHMEM zone refer to kernel not mapped directly, so that > includes userspace programs right? > > I googled and searched for all those answers but couldn't find a > direct and consistent answer, thats why I'm asking for your guys help. > > Thanks very much for you time, > > Marcos Roriz > > -- > To unsubscribe from this list: send an email with > "unsubscribe kernelnewbies" to ecartis@nl.linux.org > Please read the FAQ at http://kernelnewbies.org/FAQ > -- 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