Messages in this thread | | | Date | Mon, 25 Jun 2007 19:17:16 -0400 | From | Jeff Garzik <> | Subject | Re: [PATCH] atl1: disable 64bit DMA |
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Jay Cliburn wrote: > 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.
Although its possible this device doesn't really support 64-bit, it's more likely that this is a platform problem of some sort, or a driver bug of some sort. In the driver, maybe it has a problem when you -cross- a 4GB boundary, which is not uncommon.
Jeff
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