Re: [this_cpu_xx V7 6/8] Make slub statistics use this_cpu_inc

[Christoph Lameter]

On Tue, 15 Dec 2009, Eric Dumazet wrote:

> Le 14/12/2009 23:03, Christoph Lameter a écrit :
> > this_cpu_inc() translates into a single instruction on x86 and does not
> > need any register. So use it in stat(). We also want to avoid the
> > calculation of the per cpu kmem_cache_cpu structure pointer. So pass
> > a kmem_cache pointer instead of a kmem_cache_cpu pointer.
> >
>
> Hmm, last time I checked, [__]this_cpu_inc were not using "inc" on x86,
> but the default [__]this_cpu_add((pcp), 1)

Well the add 1 is still a single instruction so its okay. We can easily
add support for inc on x86 if makes a difference?