From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Bottomley Date: Sun, 18 May 2003 14:28:45 +0000 Subject: [Linux-ia64] Re: [patch] support 64 bit pci_alloc_consistent 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 Sun, 2003-05-18 at 09:21, Arjan van de Ven wrote: > On Sun, May 18, 2003 at 09:17:48AM -0500, James Bottomley wrote: > > (it uses 32 bit addr and 32 bit len descriptors, but reduces len to 24 > > bits to steal the extra byte for 7 bits extra addressing). However, it > > is forced to request the full 64 bit address mask---I've never worked > > out what will happen to it on a machine with more than 512GB memory. > > Uh??? right now even in 2.4 arbitrary bitmasks are supported for > non-coherent memory. Ah, my mistake. I keep forgetting there are two of these drivers in the aic7xxx directory. The 79xx does have a 64 bit descriptor and sets the full width. The 7xxx doesn't and sets a partial width. Sorry, James