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Subject: Re: Non-GPL export of invalidate_mmap_range
From: "Stephen C. Tweedie" <sct@redhat.com>
To: Daniel Phillips <phillips@arcor.de>
Cc: Andrew Morton <akpm@osdl.org>, "Paul E. McKenney" <paulmck@us.ibm.com>,
       Christoph Hellwig <hch@infradead.org>,
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Date: 19 Feb 2004 22:06:42 +0000
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Hi,

On Thu, 2004-02-19 at 20:56, Daniel Phillips wrote:

> OpenGFS and Sistina GFS use zap_page_range directly, essentially doing the 
> same as invalidate_mmap_range but skipping any vmas belonging to MAP_PRIVATE 
> mmaps.

Well, MAP_PRIVATE maps can contain shared pages too --- any page in a
MAP_PRIVATE map that has been mapped but not yet written to is still
shared, and still needs shot down on truncate().

--Stephen