On Wed, Sep 27, 2006 at 10:57:12AM +0200, Ingo Molnar wrote:
> * Bill Huey <[email protected]> wrote:
>
> > Because the conversion of memory allocation routines like kmalloc and
> > kfree aren't safely callable within a preempt_disable critical section
> > since they were incompletely converted in the -rt. [...]
>
> they were not 'incompletely converted' - they are /intentionally/ fully
> preemptible.
What I meant by "incompletely converted" is that the allocators could be
made more safe in non-preemptible scenarios under -rt. It's potentially
a valuable thing to have since GFP_ATOMIC semantics already exist in the
current allocators and a newer category could be added as a new feature of
that allocator for those scenarios. I'm happy dequeuing things off of my
own free list, but that's just me.
-rt semanatics created a couple of new locking scenarios that the previous
kernel didn't really have to address. That's all that I meant by that. :)
bill
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