Date: Mon, 14 Oct 2002 15:29:33 +0100 From: Christoph Hellwig <hch@infradead.org> To: Terry Lambert <tlambert2@mindspring.com> Cc: Christoph Hellwig <hch@infradead.org>, "M. Warner Losh" <imp@bsdimp.com>, wes@softweyr.com, dillon@apollo.backplane.com, vova@sw.ru, nate@root.org, arch@FreeBSD.ORG Subject: Re: Database indexes and ram Message-ID: <20021014152933.A16492@infradead.org> In-Reply-To: <3DA9B4E1.1257DAA8@mindspring.com>; from tlambert2@mindspring.com on Sun, Oct 13, 2002 at 11:01:05AM -0700 References: <200210082051.g98KpjU1084793@apollo.backplane.com> <3DA4C271.37AACAA3@softweyr.com> <20021012135245.A16453@infradead.org> <20021012.150616.129769790.imp@bsdimp.com> <20021013133106.C15151@infradead.org> <3DA9B4E1.1257DAA8@mindspring.com>
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On Sun, Oct 13, 2002 at 11:01:05AM -0700, Terry Lambert wrote: > Christoph Hellwig wrote: > > On Sat, Oct 12, 2002 at 03:06:16PM -0600, M. Warner Losh wrote: > > > Unless the card is 64bit, it can't DMA past 4G. > > > > Right. But if you have a server with > 4GB memory you usually have > > thos cards. Dito for the non-PCI devices. > > Name one motherboard with more than 2 64 bit PCI slots. IBM summit (x440), IBM/Sequent NUMAQ, Unisys es7xxx, many serverworks-base big boards. Apples' current G4 PowerMACs, etc for the ones with 32bit CPUs. For 64bit CPUs: most PCI-based UltraSparcs, SGI SN0/SN1/SN2 (mips and ia64), many AlphaServers, many Power4-based IBM pSeries machiens, NEC AzusA, and I"m sure I forgot a few. Not to mention other designs on which Linux doesn't even run. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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