From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from burns.conectiva (burns.conectiva [10.0.0.4]) by perninha.conectiva.com.br (Postfix) with SMTP id 1DB99391E0 for ; Wed, 24 Apr 2002 11:52:57 -0300 (EST) Date: Wed, 24 Apr 2002 11:52:43 -0300 (BRT) From: Rik van Riel Subject: Re: Why *not* rmap, anyway? In-Reply-To: <87k7qxuprj.fsf@fadata.bg> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Momchil Velikov Cc: Christian Smith , Joseph A Knapka , "Martin J. Bligh" , linux-mm@kvack.org List-ID: On 24 Apr 2002, Momchil Velikov wrote: > Rik> You really need to read the pmap code and interface instead > Rik> of repeating the statements made by other people. Have you > Rik> ever taken a close look at the overhead implicit in the pmap > Rik> layer ? > > Actually, on ia32, there's no reason for the pmap layer to be any > different than the Linux radix tree. The overhead argument does not > stand. So how do you run a pmap VM without duplicating the data from the pmap layer into the page tables ? Remember that for VM info the page tables -are- the radix tree. regards, Rik -- http://www.linuxsymposium.org/2002/ "You're one of those condescending OLS attendants" "Here's a nickle kid. Go buy yourself a real t-shirt" http://www.surriel.com/ http://distro.conectiva.com/ -- 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/