(In reply to Jochen Hansper from comment #18) > > Does your dmesg after boot contain the string "Using GB pages for direct > > mapping" ? > > Yes, it does: Ah, that probably explains it. The patched switch for DEBUG_PAGEALLOC/KMEMCHECK is insufficient then. Please add the parameter "nogbpages" to kernel boot parameters, and verify that the dmesg no longer has the message. Thanks.