On Fri, Mar 14, 2014 at 02:27:06PM -0600, Linn Crosetto wrote: > Since this testing was done on a prototype, I will send you the log in > a separate email. I tried efi.git/next (with the addition of 4ce7a86), > and hit the same panic. Well, if the stack trace is the same: > ? __unmap_pmd_range+0x77/0x190 > unmap_pmd_range+0xcf/0x1c0 > populate_pgd+0x16d/0x250 > __cpa_process_fault+0x15/0xb0 ... it looks like populate_pgd() fails and unmaps the whole range. You could add some debug printks to find out exactly why populate_pgd() fails. Also, please try to catch full dmesg and the whole oops. Btw, Matt, your whole efi/next stuff is already in tip, right? Because if so, Linn could simply test latest tip/master. Thanks.