Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpuaccess overhead

[Eric Dumazet]

Christoph Lameter a écrit :
> On Mon, 12 Nov 2007, Herbert Xu wrote:
>
> > David Miller <davem@xxxxxxxxxxxxx> wrote:
> > > Each IP compression tunnel instance does an alloc_percpu().
> > Actually all IPComp tunnels share one set of objects which are
> > allocated per-cpu.  So only the first tunnel would do that.
>
> Ahh so the need to be able to expand per cpu memory storage on demand 
> is not as critical as we thought.

Yes, but still desirable for future optimizations.

For example, I do think using a per cpu memory storage on net_device refcnt & 
last_rx could give us some speedups.



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