Re: A crash on ARM64 in move_freepages_block due to uninitialized pages in reserved memory
From: Michal Hocko <mhocko@kernel.org>
Date: 2018-08-23 11:10:27
Also in:
linux-arm-kernel
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