On Thu, 23 Aug 2018, Michal Hocko wrote: > On Thu 23-08-18 07:02:37, Mikulas Patocka wrote: > [...] > > This crash is not from -ENOENT. It crashes because page->compound_head is > > 0xffffffffffffffff (see below). > > > > If I enable CONFIG_DEBUG_VM, I also get VM_BUG. > > This smells like the struct page is not initialized properly. How is > this memory range added? I mean is it brought up by the memory hotplug > or during the boot? > -- > Michal Hocko > SUSE Labs During the boot. There's not hotplug. Mikulas
