From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Williamson Date: Tue, 30 Sep 2003 18:06:46 +0000 Subject: Re: Problem using more than 2 GB with my driver Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org On Tue, 2003-09-30 at 11:49, Grant Grundler wrote: > On Tue, Sep 30, 2003 at 04:13:30PM +0200, Patrice Martinez wrote: > > I wrote a driver using the physical addresses of a buffer computed by > > the "ia64_tpa" function (but no using DMA) that works only on machines > > with 2Gb of RAM at most. With more RAM, the machine crashes very badly > > after a while, and even KDB is not usable... > > If anybody has an a idea ;-) > > Which machine is this on? > rx2600/rx5670 has a memory hole from 2-4GB because of IO "stuff". > ie memory > 2G ends up getting placed above 4GB physical. > Minor correction, on zx1, memory in the 1-4GB range is relocated. So there's actually only 1GB of memory below 4GB. Alex -- Alex Williamson HP Linux & Open Source Lab