On 05/18/2012 10:10 PM, Sosnowski, Maciej wrote: > On Thu, May 07, May 10, 2012 3:59 AM, Jiang Liu <liuj97@xxxxxxxxx> wrote: >> >> Hi Maciej, >> I feel we may also need to tune the multiple IOH support in DCA. >> Multiple IOH support is disabled for CB3.0 devices, how about CB3.1 devices >> in Ivrbridge or SandyBridge? Does the hardware limitation still exist? Or >> could we support multiple IOHs with IvyBridge and SandyBridge? >> If multiple IOH is supported, I think we should move the logic to >> disable multiple IOH support for CB3.0 from DCA core into ioatdma. I have >> also prepared two patches for that two. >> Thanks! >> > > At this point I do not think we would need to tune multiple IOH for DCA. > The limitation you mention applies only to CB3.0. I do not think DCA is supported > with Sandy Bridge / Ivy Bridge regardless of multi-IOH case but let me confirm it > yet. It seems that Intel introduces DDIO technology for IvyBridge. Does it replace DCA technology on new platforms? Thanks! > > Thanks, > Maciej -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
