From: Andi Kleen <andi@firstfloor.org>
To: Michael Chan <mchan@broadcom.com>
Cc: Jamie webb <j@jwebb.sygneca.com>,
Andi Kleen <andi@firstfloor.org>,
netdev@vger.kernel.org
Subject: Re: PROBLEM: tg3 spitting out uninitialized memory
Date: Mon, 16 Apr 2007 08:31:26 +0200 [thread overview]
Message-ID: <20070416063126.GB14641@one.firstfloor.org> (raw)
In-Reply-To: <1551EAE59135BE47B544934E30FC4FC09400A0@nt-irva-0751.brcm.ad.broadcom.com>
> That's right. See the discussion on a similar problem here:
>
> <http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=10
> 59644&admit=-682735245+1158251313899+28353475>
That's an AMD machine.
>
> In this other case, the symptoms were very similar to yours.
> I suspected it was an IOMMU problem, and the problem went
> away when the user upgraded to the latest kernel at that
> time.
tg3s never use the IOMMU on AMD systems with production kernels
because they have a suitably large DMA mask. IOMMU is only used
there to remap memory that doesn't fit a device's DMA mask.
There is a debugging mode to force iommu always, but it is not used
unless you configure it specially.
-Andi
next prev parent reply other threads:[~2007-04-16 6:31 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-11 21:49 PROBLEM: tg3 spitting out uninitialized memory Jamie webb
2007-04-12 14:50 ` Andi Kleen
2007-04-12 20:39 ` Michael Chan
2007-04-13 17:51 ` Jamie webb
2007-04-16 6:25 ` Michael Chan
2007-04-16 6:31 ` Andi Kleen [this message]
2007-04-16 6:43 ` Michael Chan
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