I've run into "PCI-DMA: Out of IOMMU space" messages after loading and unloading a module 30 times. The interesting thing is this only happens if I have > 4 GB of memory. The box this occurs has AMD Phenom quad core CPU so I take it a harware IOMMU is being used. Below are example relevant messages with > 4 GB and then < 4 GB of memory. The driver I tested this with was ath9k. It could be an issue perhaps with ath9k but I am unable to find an issue in our probe/removal. Could this be an issue with the AMD IOMMU used? Or is it more likely a driver issue? With > 4 GB of RAM: phy0: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011820000, irq=19 phy1: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20012520000, irq=19 phy2: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117a0000, irq=19 phy3: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117c0000, irq=19 phy4: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117a0000, irq=19 phy5: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117c0000, irq=19 phy6: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117a0000, irq=19 phy7: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117c0000, irq=19 phy8: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117a0000, irq=19 phy9: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117c0000, irq=19 phy10: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117a0000, irq=19 phy11: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117c0000, irq=19 phy12: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117a0000, irq=19 phy13: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117c0000, irq=19 phy14: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117a0000, irq=19 phy15: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117c0000, irq=19 phy16: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117a0000, irq=19 phy17: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117c0000, irq=19 phy18: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117a0000, irq=19 phy19: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117c0000, irq=19 phy20: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117a0000, irq=19 phy21: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117c0000, irq=19 phy22: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117a0000, irq=19 phy23: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117c0000, irq=19 phy24: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117a0000, irq=19 phy25: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117c0000, irq=19 phy26: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117a0000, irq=19 phy27: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117c0000, irq=19 phy28: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117a0000, irq=19 phy29: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117c0000, irq=19 phy30: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200117a0000, irq=19 ath9k 0000:01:06.0: PCI-DMA: Out of IOMMU space for 3904 bytes ath9k 0000:01:06.0: PCI-DMA: Out of IOMMU space for 3904 bytes ath9k 0000:01:06.0: PCI-DMA: Out of IOMMU space for 3904 bytes ... etc The full log can be seen at: http://bombadil.infradead.org/~mcgrof/logs/log-out-of-mem-full With < 4GB RAM: phy0: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011200000, irq=19 phy1: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200125a0000, irq=19 phy2: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200110a0000, irq=19 phy3: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011140000, irq=19 phy4: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200110a0000, irq=19 phy5: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011140000, irq=19 phy6: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200110a0000, irq=19 phy7: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011140000, irq=19 phy8: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200110a0000, irq=19 phy9: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011140000, irq=19 phy10: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200110a0000, irq=19 phy11: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011140000, irq=19 phy12: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200110a0000, irq=19 phy13: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011140000, irq=19 phy14: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200110a0000, irq=19 phy15: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011140000, irq=19 phy16: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200110a0000, irq=19 phy17: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011140000, irq=19 phy18: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200110a0000, irq=19 phy19: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011140000, irq=19 phy20: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200110a0000, irq=19 phy21: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011140000, irq=19 phy22: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200110a0000, irq=19 phy23: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011140000, irq=19 phy24: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200110a0000, irq=19 phy25: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011140000, irq=19 phy26: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200110a0000, irq=19 phy27: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011140000, irq=19 phy28: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200110a0000, irq=19 phy29: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011140000, irq=19 phy30: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc200110a0000, irq=19 phy31: Atheros AR5416 MAC/BB Rev:2 AR2122 RF Rev:81: mem=0xffffc20011140000, irq=19 ..etc goes on and on The full log can be seen at: http://bombadil.infradead.org/~mcgrof/logs/log-out-of-mem-full-NOT Luis -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
