From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Mosberger Date: Tue, 04 Dec 2001 20:32:30 +0000 Subject: Re: [Linux-ia64] patch to no longer use ia64's software mmu 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, 04 Dec 2001 12:22:54 -0800 (PST), "David S. Miller" said: DaveM> If what you are asking is should we tweak the APIs again so DaveM> that situations like current IA64 can be done more sanely in DaveM> the PCI DMA layer, I say definitely no. I certainly agree that the PCI DMA interface shouldn't be tweaked just because of IA64. What I'm wondering is whether we'll have to tweak it anyhow to more gracefully handle the case where a hardware I/O TLB runs out of space. If so, I think the software I/O TLB makes sense. DaveM> There really is no excuse for the current IA64 hardware DaveM> situation, there were probably well over 3 or 4 major 64-bit DaveM> platforms from competitors, whose PCI controllers were pretty DaveM> well documented publicly, from which Intel could have derived DaveM> a working 64-bit platform PCI controller design. Well, I won't comment on *this* one! ;-)) --david