On Fri 10-01-20 13:27:24, Dan Williams wrote: > On Fri, Jan 10, 2020 at 9:42 AM David Hildenbrand <david@xxxxxxxxxx> wrote: [...] > > For your reference (roughly 5 months ago, so not that old) > > > > https://lkml.kernel.org/r/20190724143017.12841-1-david@xxxxxxxxxx > > Oh, now I see the problem. You need to add that lock so far away from > the __add_memory() to avoid lock inversion problems with the > acpi_scan_lock. The organization I was envisioning would not work > without deeper refactoring. Sorry to come back to this late. Has this been resolved? -- Michal Hocko SUSE Labs