On Wed, 21 Mar 2018 21:30:25 -0400 jglisse@xxxxxxxxxx wrote: > This code was lost in translation at one point. This properly call > mmu_notifier_unregister_no_release() once last user is gone. This > fix the zombie mm_struct as without this patch we do not drop the > refcount we have on it. OK, I'm officially all messed up and confused ;) I'll await the next full resend, please.