From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: pvops: AHCI problems with SB600 Date: Wed, 23 Sep 2009 15:32:45 -0400 Message-ID: <20090923193245.GA5682@phenom.dumpdata.com> References: <4AB431AD.1030205@goop.org> <4AB4EEB8.7050107@web.de> <20090921150634.GD20933@phenom.dumpdata.com> <4AB89227.8050302@web.de> <20090922140825.GB21736@phenom.dumpdata.com> <20090923120646.GA3199@phenom.dumpdata.com> <4ABA7578.8030201@goop.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <4ABA7578.8030201@goop.org> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Jeremy Fitzhardinge Cc: Patrick Scharrenberg , Xen-devel List-Id: xen-devel@lists.xenproject.org On Wed, Sep 23, 2009 at 12:22:32PM -0700, Jeremy Fitzhardinge wrote: > On 09/23/09 05:06, Konrad Rzeszutek Wilk wrote: > > I've gotten my hands on machine with SB700 and it exhibits similar problems. The > > SB700 AHCI controller stops working if I have more than 4GB in the machine. > > > > You mean just with this kernel? I presume it works OK normally. http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1514 has the details. It looks that the calls to ioremap_nocache return an address that is not synchronized with the physical address. This is exhibited only when dom0 has more than 4GB, so if you do dom_mem=max:4GB the machine boots succesfully. If I boot the machine without Xen, with Linux seeing 8GB, 4GB, 6GB, or whatnot, it boots succesfully.