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From: John Baldwin <jhb@freebsd.org>
To: Alexandre Fiveg <afiveg@freebsd.org>
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Cc: Perforce Change Reviews <perforce@freebsd.org>
Subject: Re: PERFORCE change 180741 for review
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On Saturday, July 10, 2010 11:09:21 pm Alexandre Fiveg wrote:
> http://p4web.freebsd.org/@@180741?ac=10
> 
> Change 180741 by afiveg@cottonmouth on 2010/07/11 03:08:49
> 
> 	d_mmap is eliminated from ringmap because of very strange behavior. Now: 
user-space process calls read(/dev/ringmap ... ) in order get physical addres 
of ring. Then by calling mmap(/dev/mem, .... , offset=ring_phys_addr) the ring 
will be mapped into user-space.

Oof, this is not appropriate.  You should use d_mmap.  Can you provide more 
details on the problems you see with d_mmap?

-- 
John Baldwin