task_struct.active_mm

[Ed L Cashin <ecashin@uga.edu>]

Hi.  I'm trying to clarify my understanding of the role of the
active_mm field in the task_struct.  

Is it true that kernel threads and interrupt handlers use the
active_mm field to borrow the mm of a process?

Is it true that in a process, which always has a non-null mm, always
has current->mm == current->active_mm?

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