Re: TTY loosing data with u_serial gadget

From: Stefan Bigler
Date: Fri Mar 18 2011 - 17:20:22 EST

In essence if you get a value from receive_room it's a guarantee you may
send that many bytes, it is not a precise instantaneous perfect answer to
the question "exactly what number of bytes could fit at this precise


I have no problem with having more space available than guarantied by
the value of receive_room. But what I see is that the value can be less!
Data will be lost.
My test showed:
data to queue=201
receive_room (guarantied space) =287
real space in queue =0
In the last mail I attached the code for printing, the read_lock was only
added to show a constistant view of all current values.

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