Re: [RFD] Merge task counter into memcg

From: Glauber Costa
Date: Thu Apr 12 2012 - 12:37:26 EST


On 04/12/2012 11:55 AM, Frederic Weisbecker wrote:
I don't know how the kernel stack is allocated for tasks. Do you mean
that we allocate a chunck of it for each new task and we could rely
on that?

More than this: amount of kernel stack is really, really something indirect if what you want to track is # of processes. Now, Hannes made a fair point in his other e-mail about what is a resource and what is not.

> After all, we would only restrict the number of tasks for the
> resources they require
It depends if the kernel stack can have other kind of "consumer".

It also depends on what you really want to achieve.
If you want to prevent fork bombs, limiting kernel stack will do just fine.

Is there anything for which you need to know exactly the number of processes?
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