On Mon, Jul 31, 2017 at 09:03:09AM +0300, Avi Kivity wrote: > I remembered that current->mm does not change when switching to a kernel > task, but my Kernlish is very rusty, or maybe it has changed.
kernel threads do indeed preserve the mm of the old userspace task, but we track that in ->active_mm. Their ->mm will be NULL.
