Date: Tue, 15 Jun 2004 13:57:58 -0700 From: Peter Wemm <peter@wemm.org> To: freebsd-current@freebsd.org Cc: Daniel Lang <dl@leo.org> Subject: Re: PAE on -current pitfalls and issues? Message-ID: <200406151357.58738.peter@wemm.org> In-Reply-To: <20040615125552.GB4779@atrbg11.informatik.tu-muenchen.de> References: <20040615124605.GA4779@atrbg11.informatik.tu-muenchen.de> <20040615125552.GB4779@atrbg11.informatik.tu-muenchen.de>
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On Tuesday 15 June 2004 05:55 am, Daniel Lang wrote: > Hi again, > > Daniel Lang wrote on Tue, Jun 15, 2004 at 02:46:05PM +0200: > [..] > > > - Do I need to include 'options PAE' somehow into the > > build of the kernel-modules in order to use them? > > Or is a pure static kernel the only option? > > I just stumbled across the handbook section about PAE, > so this says modules are not working. I assume this is > still the case. There's a gotcha with KVA_PAGES. On a standard kernel, there are 1024 Page directory slots. By default we use 256 of them for 1 out of 4GB. On a PAE kernel, there are now 2048 page directory slots. The same 1:3 split requires a default KVA_PAGES of 512. So if you want to increase KVA beyond the default 1GB, do not forget to take the scaling into account. > Cheers, > Daniel -- Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com "All of this is for nothing if we don't go to the stars" - JMS/B5
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