Begin forwarded message: Date: Thu, 21 Sep 2006 18:10:56 -0700 From: bugme-daemon@xxxxxxxxxxxxxxxxxxx To: bugme-new@xxxxxxxxxxxxxx Subject: [Bugme-new] [Bug 7180] New: aic94xx driver locks up on IBM x366 with Calgary IOMMU enabled http://bugzilla.kernel.org/show_bug.cgi?id=7180 Summary: aic94xx driver locks up on IBM x366 with Calgary IOMMU enabled Kernel Version: 2.6.18 Status: NEW Severity: normal Owner: djwong@xxxxxxxxxx Submitter: djwong@xxxxxxxxxx CC: alexisb@xxxxxxxxxx Most recent kernel where this bug did not occur: 2.6.17 Distribution: Ubuntu 6.06 Hardware Environment: IBM x366, 4x 3.16GHz Xeon, 8G RAM, aic94xx SAS controller, 6x 36G SAS disks, Calgary IOMMU Software Environment: netbooted Ubuntu mutant. Problem Description: aic94xx driver NMIs the system if calgary iommu is enabled. Steps to reproduce: 1. Clone linux-2.6 and add in scsi-misc, scsi-rc-fixes and aic94xx from git.kernel.org. 2. Build a netbootable "allmodconfig" kernel with attached config file. 3. Calgary IOMMU code activates 4. Subsequent loading of the aic94xx driver causes the service processor to log a PCI SERR with a split completion timeout, followed by an NMI, followed by a reboot. Note that disabling the Calgary IOMMU for the bus that the SAS controller is connected to (either via kconfig or iommu=none or calgary=disable=1) will make the problem go away. ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
