Date: Thu, 30 Dec 2004 11:45:11 -0700 From: Scott Long <scottl@freebsd.org> To: Bosko Milekic <bmilekic@technokratis.com> Cc: "Christian R." <cr@it.dk> Subject: Re: Memory handling problem with FreeBSD 5.3? Message-ID: <41D44CB7.8050805@freebsd.org> In-Reply-To: <20041230181118.GA71221@technokratis.com> References: <2rg6t0ll6th99497btiu13foetanfrn0gr@4ax.com> <41D368A4.1030408@freebsd.org> <8tg7t09g1f04igli4cplkob6ens98ckou0@4ax.com> <aqn7t0913lio6dv4nrbj0f7f73uc8kvsr0@4ax.com> <qh98t0he9573makq9l542tpkmpbujot01n@4ax.com> <41D43DC7.8070502@freebsd.org> <20041230181118.GA71221@technokratis.com>
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Bosko Milekic wrote: > On Thu, Dec 30, 2004 at 10:41:27AM -0700, Scott Long wrote: > >>Christian R. wrote: >> >>>On Thu, 30 Dec 2004 12:02:16 +0100, you wrote: >>> >>> >>> >>>>Would the AMD64 version of FreeBSD 5.3 be a better choice? >>> >>> >>>I have now installed the AMD64 version on the server. It has been >>>running stable now for some hours with alot of load and all the 6 GB >>>activated. It seems to be a problem with the i386 version og FreeBSD >>>5.3. >>> >> >>i386 and amd64 have the exact same code for handling the needs of the >>amr driver. I'm a bit worried that one works for you while the other >>doesn't; I extensively tested the code on both platforms with 8GB of >>RAM. >> >>Scott > > > Maybe I missed something in this thread, but what does it have to do > with the amr driver? The first thing that came to mind was something > with PAE and how it affects PDE modifications. > > On i386, it might be worth trying these combinations: > > 1. SMP, NO PAE. > 2. UP, PAE. > 3. UP, NO PAE. > > As we already know that "SMP, PAE" for you has problems. > Bounce buffers were horribly broken in 5.3-RELEASE for amd64 and i386, and the amr driver itself was unreliable in using them even when they worked (the amr driver cannot do 64-bit S/G right now). I fixed all of this stuff a few weeks ago. I tested all of this extensively under PAE, but you're correct that this particular problem could very well be related to pmap problems specific to i386. Scott
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