A crash on ARM64 in move_freepages_block due to uninitialized pages in reserved memory
From: mhocko@kernel.org (Michal Hocko)
Date: 2018-08-23 11:24:02
Also in:
linux-mm
On Thu 23-08-18 07:16:34, Mikulas Patocka wrote:
On Thu, 23 Aug 2018, Michal Hocko wrote:quoted
On Thu 23-08-18 07:02:37, Mikulas Patocka wrote: [...]quoted
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?During the boot. There's not hotplug.
Do you have any trail where the memory range is registered from? -- Michal Hocko SUSE Labs