It seems to me, that this argument is becoming about "you said these and
I said
these" but NOTHING about what really matters and that is how Ubuntu
implement SMP.
To me,then, this is not about me or you, what I said and what you said;
this is about what Ubunto
does as far as SMP is concerned.
You are saying that the previous posts are about what Ubunto does when
implementing UP.
So, what about what Ubunto does when it implements SMP ?
O Plameras
Jeff Waugh wrote:
<quote who="O Plameras">
Someone should explain how this is done in your kernel.
No, James asked how we did the dynamic enable/disable of the SMP locks,
which is an entirely different thing to the existence of separate kernel
builds for UP and SMP (which you incorrectly assumed, based on no apparent
research or attention to detail in this very thread whatsoever, that Ubuntu
did not ship).
You were asked by one poster but you sidestep the question. And until
now, there is no sensible explanation.
I did not sidestep the question about dynamic enable/disable of the SMP
locks. Sure, I did not explain it in depth, but James understood what we
were trying.
Just saying I have no research is not true. I have and I explained my
understanding.
You quoted two lines out of context (the comment would have helped you) to
assert that a) Ubuntu didn't ship an SMP kernel package and b) that Linux
did not support SMP (given that these two lines are direct quotes from the
kernel, Ubuntu or not).
Let's be clear:
1) Ubuntu currently ships and supports separate packages for UP and SMP
kernels
2) Ubuntu is experimenting with (in the developer branch) a patch that will
dynamically optimise out the SMP locks on UP systems, thus allowing us
to build only one kernel package for both UP and SMP systems
3) Linux absolutely supports SMP, and your interpretation of the quoted
code was wrong, mostly because you missed a crucial part of the original
quote, but probably also because you seem to be incorrectly attributing
this code to the Ubuntu dynamic UP/SMP patch (probably just confusion on
your part)
- Jeff
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