Re: [Xenomai-help] Sychronize between Linux and Xenomai domain

[Jan Kiszka <jan.kiszka@domain.hid>]

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Li Yi (Adam) wrote:
> Hi Jan,
> 
> Sometimes there is situation to  protect a  Non-real time task in kernel
> space NOT to be interrupted by Xenomai task.
> Is disabling HW interrupt the only way? Can I stall Xenomai Domain from

Think of SMP as well (ok, blackfin is UP so far, right? :)): you need
IRQ lock + some spinlock that is acquired in the IRQ handler(s) as well,
thus you end up with that rtdm_lock_t again.

> handling interrupt while let the Linux domain
> handle interrupt normally?

Stalling (i.e. preventing IRQ delivery) higher prio domains (like
Xenomai) implicitly means stalling all lower prio ones (including
Linux): No, this is not possible. You might prevent rescheduling by
setting the scheduler lock of Xenomai, but this still doesn't protect
from IRQs.

Jan


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