On Mon, 2010-04-12 at 21:30 +0200, Peter Zijlstra wrote:
quoted text
> 
> We could here return a non-valid and already freed anon_vma.
> 
OK, so non of the users of page_lock_anon_vma() with exception of the
memory-failure.c one could really care. And all of them seem to be safe
enough wrt dealing with a dead one.

So unless people care, I'm going to not spend more time on trying to
make page_lock_anon_vma() behave.

Instead I'll try and see wth it is that migrate.c and rmap_walk_anon are
doing.

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