Re: [PATCH 2.6.12-rc4] cpuset exit NULL dereference fix

[Simon Derr]

On Thu, 26 May 2005, Paul Jackson wrote:

> Would it make sense, Simon, to recommend to Andrew that
> he take the simple patch I submitted yesterday for this
> now, since it avoids a kernel crash and the risk of other
> uglies?
> 
> Then, when we understand that improved scalability is needed,
> and we have agreed on a solution to that, offer up a second
> patch?
> 
Of course !



> > I feel like this 'scaling problem' still exists even with:
> Can you back this feeling with numbers, with real measurements?

I don't.
My point is only that if you think there is a scaling problem in 
taking cpuset_sem for each call to cpuset_exit(), that scaling problem 
won't disappear by taking cpuset_sem only for 'notify_on_remove' cpusets, 
as such cpusets might exist over the whole system.

	Simon.

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