On Mon, 25 Sep 2000, Andrea Arcangeli wrote:
> driver (and I very much hope that with EXCLUSIVE gone away and the
> wait_on_* fixed those hangs will go away because I don't see anything else
> wrong at this moment).
the EXCLUSIVE thing only optimizes the wakeup, it's not semantic! How
better is it to let 100 processes race for one freed-up request slot?
There is no guarantee at all that the reader will win. If reads and writes
racing for request slots ever becomes a problem then we should introduce a
separate read and write waitqueue.
the EXCLUSIVE thing was noticed by Dimitris i think, and it makes tons of
(performance) sense.
Ingo
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