Re: [rtl] Re: [realtime] Re: [ANNOUNCE] Adaptive Domain Environment for Operating Systems

[Paolo Mantegazza <mantegazza@aero.polimi.it>]

Karim Yaghmour wrote:
> 
> Hello Cort,
> 
> You're somewhat right. There are hardware issues that may be out
> of the reach of any software, the PCI stall example is a good
> one. On the other, whether RTLinux is running on Alpha, MIPS or
> PowerPC, device drivers can still issue the equivalent cli/sti
> and ruin determinism. There's nothing RTLinux can do about it.
> 

The cli/sti is just for ix86. From many other archs you'll get just a
fault since you are trying to manipulate the status register, to cli/sti
the related flag from a lower privilige. Can anybody tell me how can one
ascertain that the status register is being access just for cli/sti
without touching Linux code?

Ciao, Paolo.