> > Recently(dec.) in WindowsNT magazine comparisons/similarities between
> > various flavours of unix and nt had come. In the same article Linux was
> > ignored as enterprise os on account of following kernel 'limitations' :
>
> Windows NT magazine also ran an article stating all Linux programs had to
> distribute their source. In the same article, they mention Oracle,
> Informix, and Corel porting. So where do I download Oracle 8 source?!?
> The Win NT writers either aren't bright enough to understand the LGPL,
> or they're deliberately spreading misinformation.
> Either way, I can't imagine any group of people less qualified to comment
> on the Linux kernel.
>
> > 1. kernel is not preemptive. ie even a higher priority user thread cant
> > cause another thread to be swapped if the other thread is presently running
> > in privileged/kernel context.
nonsense...
> > 2. kernel is not reentrant. ie.only one thread in kernel context at a
time.
>
> I believe these complaints may apply to the 2.0 kernel, due to kernel wide
> spin-locks, but not 2.2
>
> > 3. kernel is not multi processing in the sense that on multiprocessor
> > systems it will run on only one cpu at a time.
>
if there is a kernel-wide lock at any given moment there can't be more
than 1 cpu running the kernel. As said 2.2 is better.
Vladimir Dergachev
> This I don't believe. What would be the point of SMP support if it only
> used one processor at a time? So either they're looking at a kernel prior
> to SMP, or they have no idea what they're talking about. Or possibly, I've
> misunderstood the statement.
>
> > will somebody can clarify these doubts and version which enabled it to be
> > otherwise.
>
> I'm by no means a kernel expert, but I didn't see any other responses.
> Anyway, I might be wrong.
>
> Justin Bradford
> justin@ukans.edu
>
>
>
>
>
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