amd64/87977 : [busdma] [panic] amd64 busdma dflt_lock called (by ata) if physmem>4G

[Attila Nagy]

Thomas Hurst wrote:
> The following reply was made to PR amd64/87977; it has been noted by GNATS.
> 
> From: Thomas Hurst <tom at hur.st>
> To: bug-followup at FreeBSD.org
> Cc: jc at oxado.com
> Subject: Re: amd64/87977 : [busdma] [panic] amd64 busdma dflt_lock called (by ata) if physmem>4G
> Date: Tue, 27 Dec 2005 15:52:26 +0000
> 
>  I see this with RELENG_6 on a Tyan S2895 using the on-board nForce 4
>  SATA with >2 disks and 4G of memory.  A simple gmirror load across 3 or
>  more disks is sufficient to cause a panic.
>  
>  Are there any suggested workarounds beyond not using 4G or finding a
>  controller that doesn't use ata(4)?
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.

-- 
Attila Nagy                                   e-mail: Attila.Nagy at fsn.hu
Adopt a directory on our free software         phone: +3630 306 6758
server! http://www.fsn.hu/?f=brick