> The reason for the lack of replies is that no-one has much of an idea. > This really looks like a hardware problem. The qi_submit_sync() is > suggestive: it's the intel IOMMU mapping call ... have you tried > reproducing this with the iommu disabled? I turned off VT-d, and the problem went away. I turned on VT-d, and turned off all of the sub-options: Interrupt remapping Coherency ATS support Pass-through DMA and the problem remained. So them I did a hail mary, and upgraded my GA-X79-UP4 from the F2 BIOS to the beta F5c BIOS. VT-d and all of the sub-features are turned on, and I'm on my 6th full read pass over the entire RAID array (when it would crash before 15% before), with no problem. Hardware problem, indeed. Thanks for the pointer; I wouldn't have thought of trying a BIOS upgrade without it. -- 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
