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SubjectRe: [PATCH] atl1: disable 64bit DMA
On Mon, 25 Jun 2007 17:57:20 -0400
Chris Snook <csnook@redhat.com> wrote:

> Jay L. T. Cornwall wrote:
> > Chris Snook wrote:
> >
> >> What boards have we seen this on? It's quite possible this is:
> >
> > I can reproduce on an Asus P5K with a Core 2 Duo E6600.
> >
> > lspci identifies the controller as:
> > 02:00.0 Ethernet controller: Attansic Technology Corp. L1 Gigabit
> > Ethernet Adapter (rev b0)
> >
> > dmesg notes the PCI-DMA mapping implementation:
> > PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
> >
>
> I had a hunch this was on Intel. I'd rather just disable this when
> swiotlb is in use, unless we get more complaints. It's probably
> ultimately a BIOS quirk anyway.

So far we have reports from both camps:

Asus M2N8-VMX (AM2): 1 report of lockup
http://sourceforge.net/mailarchive/forum.php?thread_name=46780384.063603.26165%40m12-15.163.com&forum_name=atl1-devel

Asus P5K (LGA775): 2 reports of lockups
http://sourceforge.net/mailarchive/forum.php?thread_name=467E7E34.4010603%40gmail.com&forum_name=atl1-devel
http://lkml.org/lkml/2007/6/25/107

The common denominator in these reports is 4GB RAM.
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