On Friday 05 December 2008 10:15:19 pm Hugues Balp wrote:
> Geoffrey Lee wrote:
> > On Fri, Dec 05, 2008 at 12:40:51PM +0100, Hugues Balp wrote:
> >>>> The compilation is ok but elfweaver crashes because of an *out of
> >>>> memory* error
> >>>> detected by the memory allocator when trying to allocate the memory
> >>>> for the second
> >>>> ok_linux cell....
> >>>
> >>> Hugues -
> >>>
> >>> Maybe you have run out of physical memory. The amount of memory
> >>> available to OK Linux is configured statically at build time via the
> >>> heap = argument in the OK Linux Sconscript. If you run out of physical
> >>> memory to back the heap then elfweaver will refuse to output the image.
> >>>
> >>>
> >>> The amount of physical memory is specified in the machine
> >>> description file in platform/<platform>/tools/machines.py.
> >>>
> >>> -gl
> >>
> >> Thanks Geoffrey,
> >
> > Hugues - specifying the add_device is equivalent to granting
> > access, you cannot grant access to two OK Linux instances
> > at the same time.
> >
> > -gl
>
> If I well understand you, it would be impossible to boot and run two ok
> linux cells on the same okl4 micro-kernel ?
>
> Nevertheless we can imagine to grant access to devices dynamically, in
> order for example for the different cells to boot
>
> sequentially, each one accessing the one after the other to the required
> serial device etc...
>
> Then the accesses to devices could be updated each time the scheduler
> switch from one cell to the other ?
>
> Is this totally impossible ?
>
> When looking at the thread "does ig_serial support more than one client"
> in the forum Ben Leslie wrote
>
> "Multiple OK Linux support can be made available for customers with
> support contracts. Public release is not currently locked in, but is
> likely to be Q3 this year. "
>
> So I suppose you have already an idea of what is required to support
> multiple wombat cells on okl4. Isn' t it ?
>
> Sorry if I don't understand you.
>
> Perhaps can you explain me what is your vision for supporting multiple
> ok linux cells ?
Hello, Hugues Balp:
Do you get any progress about your two oklinux? I traced your footsteps and
meet all the same problems as you including out of physical memory and irq
conflict. If you have booted 2 oklinux please give me some hints.
I think now OKL4 should support multiple oklinux because the most important
devices like vtimer and vserial are ok. But in the configuration file oklinux
use the physical device not virtual device like vtimer, vserial and so on. So
what we could try is to use virtual device not physical device should avoid
the irq conflicts.
Thanks.
Best regards.
Cheng Guanghui
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