Date: Wed, 30 Mar 2005 15:25:37 -0800 From: Peter Wemm <peter@wemm.org> To: freebsd-amd64@freebsd.org Cc: FreeBSD Stable Users <freebsd-stable@freebsd.org> Subject: Re: Problems with AMD64 and 8 GB RAM? Message-ID: <200503301525.37798.peter@wemm.org> In-Reply-To: <20050330230951.GY84137@wantadilla.lemis.com> References: <20050330222439.GU84137@wantadilla.lemis.com> <424B308C.7070506@samsco.org> <20050330230951.GY84137@wantadilla.lemis.com>
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On Wednesday 30 March 2005 03:09 pm, Greg 'groggy' Lehey wrote: > On Wednesday, 30 March 2005 at 16:04:44 -0700, Scott Long wrote: > > Greg 'groggy' Lehey wrote: > >> On Wednesday, 30 March 2005 at 15:30:37 -0700, Scott Long wrote: > >>> Greg 'groggy' Lehey wrote: > >>>> I've recently acquired an AMD64 box ... > >>>> > >>>> What's unstable? ... The amd64 5.4-PRERELEASE kernel just > >>>> hangs/freezes. > >>> > >>> 5.3-RELEASE has a lot of problems with >4GB due to busdma issues. > >>> Those should no longer be an issue in RELENG_5, including > >>> 5.4-PRE. > >> > >> They appear to be. > > > > I don't understand what you mean here. > > As I said above (and trimmed for convenience), this problem occurs on > 5.4-PRERELEASE as of yesterday morning. The dmesg shows that too. > > >> As I described, it doesn't appear to be the drivers. > > > > I don't see how you proved or disproved this. > > Shall I resend the original message? It seems independent of any > particular driver. That's not proof, of course, but I didn't claim > it was. Greg: The busdma problems from 5.3-RELEASE are fixed. That doesn't mean that there are no *other* problems. Scott is saying "the old busdma bug shouldn't be affecting 5.4-PRE", and he's correct. Most likely, something else is happening, eg: you're running out of KVM or something silly like that. I know we're right on the brink at 8GB. The layout of the devices may be just enough to tip it over the edge. -- 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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