On Tue 11-12-18 17:21:49, Michal Hocko wrote: > On Tue 11-12-18 18:15:42, Kirill A. Shutemov wrote: > > For instance, DAX page fault will setup page table entry on its own and > > return VM_FAULT_NOPAGE. It uses vmf_insert_mixed() to setup the page table > > and ignores your pre-allocated page table. > > Does this happen with a page locked and with __GFP_ACCOUNT allocation. I > am not familiar with that code but I do not see it from a quick look. DAX has no page to lock and also no writeback to do so the deadlock isn't really possible when DAX is in use... Honza -- Jan Kara <jack@xxxxxxxx> SUSE Labs, CR
