Date: Wed, 18 Jun 2003 16:02:22 +0200 From: Bernd Walter <ticso@cicely12.cicely.de> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: freebsd-alpha@freebsd.org Subject: Re: 5.1beta2 on Alpha ES40 w/ 32GB pys ram Message-ID: <20030618140221.GN3626@cicely12.cicely.de> In-Reply-To: <20030618123315.GH3626@cicely12.cicely.de> References: <16094.16676.273466.121560@grasshopper.cs.duke.edu> <20030613190624.W36168-100000@mail.chesapeake.net> <16110.27799.68056.48679@grasshopper.cs.duke.edu> <20030618005958.GD3626@cicely12.cicely.de> <16111.54084.284151.643826@grasshopper.cs.duke.edu> <20030618123315.GH3626@cicely12.cicely.de>
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On Wed, Jun 18, 2003 at 02:33:16PM +0200, Bernd Walter wrote: > On Tue, Jun 17, 2003 at 10:49:40PM -0400, Andrew Gallatin wrote: > > Bernd Walter writes: > > > Maybe with a tuneable size as a 4G map takes 4M map - checked for 21172. > > > > I'm not sure what you're saying. Are you saying that a sparse map can > > still be effective and we should share with the ISA map if we need to? > > If so, I agree... > > More or less. > Are sparse maps possible? > I asume there is no use for a 4G map on a system with only 1G memory > plugged in. > Beside fragmentation loss there is no need to have a bigger window. > The 21172 supports 8G memory and max 4G sized windows so we are > already limited. I'm feeling stupid. Of course that window can't be bigger than we have addressable space on PCI. I guess we are limited to something like 512M to 1G? -- B.Walter BWCT http://www.bwct.de ticso@bwct.de info@bwct.de
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