Re: Problems with AMD64 and 8 GB RAM?

From: Peter Wemm (peter_at_wemm.org)
Date: 03/31/05

  • Next message: Rob: "Re: buggy ATA controller: I can install 4.11, but not 5.3 !?!" 
    To: freebsd-amd64@freebsd.org
Date: Wed, 30 Mar 2005 15:25:37 -0800

    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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  • Next message: Rob: "Re: buggy ATA controller: I can install 4.11, but not 5.3 !?!"