On Wed, 2007-05-16 at 17:11 -0500, Wen Xiong wrote: > little history, on PCI-X adapters we did not time dma reads being > returned to the adapter. On PCIe unfortunately the spec says that > adapters need to time the dma reads the spec is not specific on the > range but the timers can range from worst case 50 usecs to 10 ms with > some adapters supporting upto 50ms. The PCIe spec has approved an ECR > to the PCIe 1.0a spec that will support the ability to disable the > timer. To work aroung the adapter doesn't support ECR. We need the > driver to disable the timer.
You do get more than 10ms delay for DMA replies on pSeries ? Ouch... Ben. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
