Date: Sun, 13 Oct 2002 20:16:34 +0200 From: Bernd Walter <ticso@cicely8.cicely.de> To: "M. Warner Losh" <imp@bsdimp.com> Cc: tlambert2@mindspring.com, ticso@cicely.de, hch@infradead.org, wes@softweyr.com, dillon@apollo.backplane.com, vova@sw.ru, nate@root.org, arch@FreeBSD.org Subject: Re: Database indexes and ram Message-ID: <20021013181633.GB34517@cicely8.cicely.de> In-Reply-To: <20021013.120847.31902907.imp@bsdimp.com> References: <3DA954CF.98B0891A@mindspring.com> <20021013.060851.113437955.imp@bsdimp.com> <3DA9B4A8.194A02FC@mindspring.com> <20021013.120847.31902907.imp@bsdimp.com>
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On Sun, Oct 13, 2002 at 12:08:47PM -0600, M. Warner Losh wrote: > I think that's all irrelevant. Cards with 32bits can't go about 4GB. > It is a far more fundamental problem. Even 32bit cards in 64bit slots > can't do this. 64bit cards could DMA into anywhere in the first > 64bits of RAM, of course. Of course they can do. It's just a matter if the card and the board support 2 address cycles. Or if the board can map the pci reachable space - as alphas can do. -- B.Walter COSMO-Project http://www.cosmo-project.de ticso@cicely.de Usergroup info@cosmo-project.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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