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Date:      Tue, 27 Dec 2005 20:31:22 +0000
From:      Thomas Hurst <tom@hur.st>
To:        Attila Nagy <bra@fsn.hu>
Cc:        bug-followup@freebsd.org, freebsd-amd64@FreeBSD.org
Subject:   Re: amd64/87977 : [busdma] [panic] amd64 busdma dflt_lock called (by ata) if physmem>4G
Message-ID:  <20051227203122.GA59870@voi.aagh.net>
In-Reply-To: <43B17251.8030906@fsn.hu>
References:  <200512271600.jBRG0Mim045012@freefall.freebsd.org> <43B17251.8030906@fsn.hu>

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* Attila Nagy (bra@fsn.hu) wrote:

> I believe this is fixed in CURRENT. On 6-STABLE you can set hw.physmem
> to use a smaller amount of memory or switch to the ata driver before
> 2005.10.08.

Thanks for the pointer.  I grabbed sys/dev/ata and sys/sys/ata.h off
my CURRENT laptop and popped it on my RELENG_6 Opteron and it appears
to work fine with all 4G -- I can pull data off all 4 disks at >250M/s
without trouble when I could previously not even get past mounting
filesystems.

Hope to see this merged before too long, but for now at least this pr is
a little bit more useful :)

-- 
Thomas 'Freaky' Hurst
    http://hur.st/



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