From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sun, 23 Jun 2002 01:59:14 -0700 From: William Lee Irwin III Subject: Re: Big memory, no struct page allocation Message-ID: <20020623085914.GN25360@holomorphy.com> References: <3D158D1E.1090802@shaolinmicro.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3D158D1E.1090802@shaolinmicro.com> Sender: owner-linux-mm@kvack.org Return-Path: To: David Chow Cc: linux-mm@kvack.org List-ID: On Sun, Jun 23, 2002 at 04:55:58PM +0800, David Chow wrote: > Hi, I've got a silly but serious question. I want to allocate a large > buffer (>512MB) in kernel. Normally you use __get_free_page and handle > it with page pointers. But when get to very large (say 1024MB), I will > need to use 2 level of page pointer indirection to carry the page > pointer array. I also find the total size of page struct is quite large > when using lots of pages, what I want is to use memory pages without > struct page, is this possible? By the way, can I use lots of memory in > the kernel, something like 1GB of memory allocation when physically RAM > available? Please give advise. Thanks. Try allocating it at boot-time with the bootmem allocator. Cheers, Bill -- 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/