RE: Floating point math in kernel interrupt -- am I doing this right?(repost)

Dan Malek wrote:

quoted

So my question is, is there some minor detail that my=20
FPU-state-save/restore
code is missing, that would cause these sort of symptoms?

Just get all of this out of the kernel.  If you used the standard ALSA
drivers and framework, lots of mixing features are available to you.
If you need some custom mixing, just write a plug-in to do it.
Your data rates are so low they don't justify making any hacks
like this.

.. or if you *do* need hard-realtime feedback, you may consider
using Xenomai[1] (formerly known as RTAI/Fusion) instead of=20
a hack of the interrupt handler. Thanks to this nice project,=20
FPU on PQ2 works fine in kernel-land, and if need be, it will=20
let you move to user-land seamlessly while keeping the constraints.
Feel free to join the xenomai-help mailing list to get more help=20
on specific questions. Disclaimer: I'm not affiliated with Xenomai,
I am just a happy user :-)

[1] http://xenomai.org


Regards,
--=20
Stephane