Hi,
Thanks for your answer.
I understand that the Linux freeze can be caused by a higher priority of the
other cell but I have not found where to change priority setting in this
example.
Secondly, when I generate a segmentation fault in the decrypt cell, I don't
understand why the Linux freezes too, I supposed that the decrypt cell is no
longer scheduled as soon as it crashes, so it shouldn't block the Linux
cell. How is it possible?
Regards,
Xavier.
-----Message d'origine-----
De : Josh Matthews [mailto:
[hidden email]]
Envoyé : vendredi 10 juillet 2009 00:11
À :
[hidden email]
Cc :
[hidden email]
Objet : Re: [okl4-developer] Cell isolation
Hi Xavier,
On Fri, July 3, 2009 10:40 am,
[hidden email] wrote:
> Hello,
>
> I would like to know what is the isolation policy between cells in OKL4
> examples (and how to change it).
> Indeed I modified the decrypt example distributed with OKL4 to crash the
> decrypt cell, and as soon as the OKL4 cell crashes, the Linux cell freezes
> too.
> Furthermore, when I try to block the OKL4 celle with a while(1)}; the OKL4
> cell still freezes.
> Since I try to crash/block the cell when there is no communication between
> the cells, I don't understand why the Linux cells is affected.
> Does anyone has an answer?
The isolation policy is very strong - cells can't impact each other unless
they have received a capability to communicate, or are sharing some
memory.
This points me to an issue with your cell priorities - is the blocked cell
(with the while(1); which is always doing work) at a higher priority than
Linux?
Cheers,
Josh
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