Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757841AbZFDQcf (ORCPT ); Thu, 4 Jun 2009 12:32:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752661AbZFDQc0 (ORCPT ); Thu, 4 Jun 2009 12:32:26 -0400 Received: from mx-out.daemonmail.net ([216.104.160.38]:40420 "EHLO mx-out.daemonmail.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751885AbZFDQcZ (ORCPT ); Thu, 4 Jun 2009 12:32:25 -0400 From: "Michael S. Zick" Reply-To: lkml@morethan.org To: Linus Torvalds Subject: Re: Linux 2.6.30-rc8 [also: VIA Support] Date: Thu, 4 Jun 2009 11:21:28 -0500 User-Agent: KMail/1.9.9 Cc: Duane Griffin , Linux Kernel Mailing List , Harald Welte References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200906041121.30845.lkml@morethan.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1564 Lines: 45 On Thu June 4 2009, Linus Torvalds wrote: > > On Thu, 4 Jun 2009, Duane Griffin wrote: > > > > There have been reports of hangs on various VIA C7 machines going back > > a year now. The version of the kernel doesn't seem to matter, but the > > version of glibc does. Unfortunately there hasn't been much progress > > in getting to the bottom of it. > > > > See here (and other linked reports): > > http://bugs.gentoo.org/show_bug.cgi?id=228263 > > Hmm. That looks like a CPU problem, but hey, it might be that the glibc > version thing is just coincidence, and just changes timings or whatever, > and the problem is in the chipsets. > > So at least from that particular report it smells very much > non-kernel-related. > > That said, even if it isn't kernel-related, it might be fixable with some > kernel patch that changes the setup of the CPU/chipset. But we'd need VIA > to help with anythign like that. > That is one of my pending questions - - (It is included as a comment at the appropriate point in my patchset.) The VIA processors have MCR's not MTRR's - - The C7-M processor uses "in-order retirement" not "out-of-order" - - I think the MCR's **should not** be set for "weak ordered writes" - _But_ until I hear the recommendation of the Silicon Growers department... Mike > Linus > > -- 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/