Date: Wed, 3 Sep 2008 21:47:59 +0100 From: David Malone <dwmalone@maths.tcd.ie> To: ticso@cicely.de Cc: Bernd Walter <ticso@cicely7.cicely.de>, freebsd-current@freebsd.org Subject: Re: MTRR fixup? Message-ID: <20080903204759.GA4898@walton.maths.tcd.ie> In-Reply-To: <20080903034943.GD11548@cicely7.cicely.de> References: <20080903034943.GD11548@cicely7.cicely.de>
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On Wed, Sep 03, 2008 at 05:49:44AM +0200, Bernd Walter wrote: > Some boards (including my Intel DG33BU) seem to have problems setting > up the mtrr to cache all RAM. > My system runs fast with 2G and ist about 6 times slower in buildworld > with 6G RAM. > I will try a BIOS update once Intels tells me why their update ISO > just turn the system off instead of updating the BIOS - sigh. > But it seems that Linux is doing some kind of fixup for MTRR: > http://lkml.org/lkml/2008/1/18/170 > Can we do something similar? You may be able to fix this by just using the memcontrol command - it already lets you program the MTRRs. David.
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