On Tue, 9 Jul 2019 15:35:56 -0700 Ralph Campbell <rcampbell@xxxxxxxxxx> wrote:
> When migrating a ZONE device private page from device memory to system
> memory, the subpage pointer is initialized from a swap pte which computes
> an invalid page pointer. A kernel panic results such as:
>
> BUG: unable to handle page fault for address: ffffea1fffffffc8
>
> Initialize subpage correctly before calling page_remove_rmap().
I think this is
Fixes: a5430dda8a3a1c ("mm/migrate: support un-addressable ZONE_DEVICE page in migration")
Cc: stable
yes?
