Re: [RFC] mempool_alloc() pre-allocated object usage

[Arjan van de Ven]

On Mon, 2005-10-03 at 17:36 +0300, Paul Mundt wrote:

> Both usage patterns seem valid from my point of view, would you be open
> to something that would accomodate both? (ie, possibly adding in a flag
> to determine pre-allocated object usage?) Or should I not be using
> mempool for contiguity purposes?

a similar dillema was in the highmem bounce code in 2.4; what worked
really well back then was to do it both; eg use half the pool for
"immediate" use, then try a VM alloc, and use the second half of the
pool for the really emergency cases.

Technically a mempool is there ONLY for the fallback, but I can see some
value in making it also a fastpath by means of a small scratch pool

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