From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 14 Jan 2001 21:56:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 14 Jan 2001 21:56:28 -0500 Received: from brutus.conectiva.com.br ([200.250.58.146]:17904 "EHLO lappi.waldorf-gmbh.de") by vger.kernel.org with ESMTP id ; Sun, 14 Jan 2001 21:56:21 -0500 Date: Mon, 15 Jan 2001 00:56:10 -0200 From: Ralf Baechle To: Russell King Cc: ebiederm@xmission.com (Eric W. Biederman), riel@nl.linux.org, andrea@suse.de (Andrea Arcangeli), linux-kernel@vger.kernel.org Subject: Re: Subtle MM bug Message-ID: <20010115005610.E1656@bacchus.dhis.org> In-Reply-To: <200101122111.f0CLBhL10716@flint.arm.linux.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <200101122111.f0CLBhL10716@flint.arm.linux.org.uk>; from rmk@arm.linux.org.uk on Fri, Jan 12, 2001 at 09:11:43PM +0000 X-Accept-Language: de,en,fr Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jan 12, 2001 at 09:11:43PM +0000, Russell King wrote: > Eric W. Biederman writes: > > Hmm. I would think that increasing the logical page size in the kernel > > would be the trivial way to handle virtual aliases. (i.e.) with a large > > enough page size you can't actually have a virtual alias. > > There are types of caches out there that no matter how large the page size, > you will always have alias issues. These are ones where the cache lines > are indexed independent of virtual address (and therefore can have funny > cache line replacement algorithms). > > And yes, you guessed which processor has it. ;) I recently spoke with some CPU architecture researcher at some university about cache architectures; I suspect in the near future we'll see more funny cache indexing and replacment algorithems ... Ralf -- "Embrace, Enhance, Eliminate" - it worked for the pope, it'll work for Bill. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/