Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 30 Oct 2001 16:53:53 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 30 Oct 2001 16:53:43 -0500 Received: from samba.sourceforge.net ([198.186.203.85]:23053 "HELO lists.samba.org") by vger.kernel.org with SMTP id ; Tue, 30 Oct 2001 16:53:30 -0500 From: Paul Mackerras MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15327.7716.638079.235753@cargo.ozlabs.ibm.com> Date: Wed, 31 Oct 2001 08:39:48 +1100 (EST) To: linux-kernel@vger.kernel.org Subject: Re: please revert bogus patch to vmscan.c In-Reply-To: <20011030095757.A9956@hq2> In-Reply-To: <20011030095757.A9956@hq2> X-Mailer: VM 6.75 under Emacs 20.7.2 Reply-To: paulus@samba.org Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Victor Yodaiken writes: > You can't turn off hardware hash-chains on anything past 603, sadly enough. > So all Macs, many embedded boards, ... All the 4xx, 8xx, and 82xx embedded PPC cpus use software TLB loading. The 7450 has a mode bit to say whether to use a hash table or software TLB loading. And the new "Book E" specification also mandates software-loaded TLBs. That still leaves almost all of the current Macs and RS/6000s using a hash table, of course. It does sound like providing at least the option to use software TLB loading is becoming common in new PPC designs. (And BTW they are not hash *chains*, there is no chaining involved. There is a primary bucket and a secondary bucket for any given address, each of which can hold 8 ptes.) Paul. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/