Re: [PACTH] enable memory mapped access to ethernet

[Guy Harris <guy () alum mit edu>]

Abeni Paolo wrote:

> Yes, they can be used. The USB capture use a character device which implement the poll interface.

My main concern is with mmapped access.  Presumably, with mmapped 
access, there are still system calls that move a "these packets have 
been read" pointer and that block until the "these packets have arrived" 
pointer to move ahead of the "these packets have been read" pointer; if 
that's the case, and if a select() or poll() will also check for the 
"these packets have arrived" pointer being ahead of the "these packets 
have been read" pointer, that will work.
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