On Thu, Jan 03, 2019 at 08:13:32AM +1100, Dave Chinner wrote: > Hi folks, > > An overnight test run on a current TOT kernel failed generic/413 > with the following dmesg output: > > [ 9487.276402] RIP: 0010:__follow_pte_pmd+0x22d/0x340 > [ 9487.305065] Call Trace: > [ 9487.307310] dax_entry_mkclean+0xbb/0x1f0 We've only got one commit touching dax_entry_mkclean and it's Jerome's. Looking through ac46d4f3c43241ffa23d5bf36153a0830c0e02cc, I'd say it's missing a call to mmu_notifier_range_init().