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Date: Tue, 31 May 2005 22:01:06 -0700
From: Andrew Morton <akpm@osdl.org>
To: linux-kernel@vger.kernel.org
Cc: timur.tabi@ammasso.com
Subject: Re: get_user_pages() and process termination
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Timur Tabi <timur.tabi@ammasso.com> wrote:
>
> If I call get_user_pages() on some pages owned by a process, and then the process exits, 
>  are the pages still pinned, or is there some kind of automatic cleanup?

get_user_pages() will pin the pages for you.  You now own the additional
refcount on those pages.  You must run put_page() against each page to
avoid leaking them.