From owner-freebsd-drivers@FreeBSD.ORG  Mon Jun 19 11:08:08 2006
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From: Karsten Brandt <Karsten.Brandt@sick.de>
Date: Mon, 19 Jun 2006 13:04:56 +0200
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Subject: ata CD driver
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Hello all,

I'm working on the ATA CD driver to increase his performance.

history:

I've tried to use ogle for video playback and it works.
But I can also seen many short breaks during the playback process.
After some test, I've determine the performance of the ATA driver as 
bottleneck.

Some days later I could see, that the driver uses many synchronisation 
objects of course.
And the use of this synchronisation objects blocks the entire system.
After some refactorings I can see now some prosperities.

But for the complete understand I search informations for the ATA_LOCKING 
function.
I can't find a documentation and what I me confused a little bit, I can't 
find this function not in the source tree of my FreeBSD.


I work on an upgraded FreeBSD 6.1 and I was very happy for each hint.


Regards,

Karsten