Scott Silva wrote: > Are you using the 105 bios? It looks to be the latest. > We are, though thanks for the suggestion. We've also fiddled with various BIOS settings, including IOMMU. I was hoping that someone had seen something similar with pagecache corruption. I've done a lot of searching on bugzilla.redhat.com. If it were a straight memory timing problem, it would seem to me we would see more random crashes and not this weird 4k-page corruption, which seems like issues with page tables or something like that.