On Mon, Aug 08, 2011 at 01:10:22AM +0200, Andrey Gursky wrote:

Hi!

Since coming of the linux-3.0-rt patch I've decided to try to switch
to that kernel, especially the goal of the RT_PREEMPT claims to make a
desktop kernel become a realtime one. Thanks to all rt-developers for
this opportunity!

I'm testing it on 3 platforms:
1) notebook Core2Duo T7250,
2) old Pentium 4 3.2 GHz with an old passive ISDN hisax-card,
3) even older AthlonXP 2.8 GHz with TV-tuner.

The first desktop problem is:
the symbol __rt_mutex_init is exported as GPL-only. This make the
usage of proprietary nvidia driver impossible, while the normal
__mutex_init is not only GPL. Could you change the license also for
the rt_mutex_init (...and maybe few more if they being linked with
nvidia/ati(?) driver just as with the vanilla "desktop" kernel)?

The next issue is more complicated. On the P4 (platform 2) I use an
ISDN-hisax modem card and per-second internet account. After a timeout
the connection is being hung up. In firefox I have a lot of tabs. Some
web pages are "active". They try to call back on their own. While this
is happening my gnome freezes sometimes. SysRq-R helps sometimes to
switch back to the console. But the gdm doesn't start anymore. Is this
a relevant issue for the rt-project? What'd be the first place to look
at to debug this behavior?

enable PROVE_LOCKING and see if that claims to find something. You might
have to setup netconsole for that to work.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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