From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 59B9F1A0061 for ; Thu, 4 Sep 2014 18:08:10 +1000 (EST) Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 9864C140080 for ; Thu, 4 Sep 2014 18:08:09 +1000 (EST) Message-ID: <1409818074.4246.53.camel@pasglop> Subject: Re: TTM placement & caching issue/questions From: Benjamin Herrenschmidt To: Michel =?ISO-8859-1?Q?D=E4nzer?= Date: Thu, 04 Sep 2014 18:07:54 +1000 In-Reply-To: <54081BC5.8000703@daenzer.net> References: <1409789547.30640.136.camel@pasglop> <20140904015548.GB4835@gmail.com> <20140904020742.GC4835@gmail.com> <1409797523.25089.8.camel@pasglop> <20140904023117.GD4835@gmail.com> <20140904023656.GF4835@gmail.com> <54081282.3040005@daenzer.net> <1409817275.4246.40.camel@pasglop> <54081BC5.8000703@daenzer.net> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Cc: Alex Deucher , linuxppc-dev@ozlabs.org, Michel =?ISO-8859-1?Q?D=E4nzer?= , Christian Koenig , dri-devel@lists.freedesktop.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Thu, 2014-09-04 at 16:59 +0900, Michel Dänzer wrote: > > Define 'not reliably'. I have uptimes of weeks, and I'm pretty sure I'm > not alone, at least with AGP 1x it seems to work quite well for most > people. So I don't see the justification for intentionally breaking it > completely for all of us. Oh I wasn't arguing for breaking it, just jesting. We need to keep it working. It's amazing how well broken stuff actually work though :-) I mean, it's architecturally broken and if we get a collision between the cache and the NCU, the chip will crash. We just get lucky I suppose. Anyway, I'll try a different approach tomorrow see how it goes. Cheers, Ben.