Re: [PATCH] Expose sysctls for enabling slab/file_cacheinterleaving

[Andi Kleen]

On Tue, Nov 19, 2013 at 11:42:03AM +0100, Michal Hocko wrote:
> On Mon 18-11-13 16:50:22, Andi Kleen wrote:
> [...]
> > diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
> > index cc1b01c..10966f5 100644
> > --- a/include/linux/cpuset.h
> > +++ b/include/linux/cpuset.h
> > @@ -72,12 +72,14 @@ extern int cpuset_slab_spread_node(void);
> >  
> >  static inline int cpuset_do_page_mem_spread(void)
> >  {
> > -	return current->flags & PF_SPREAD_PAGE;
> > +	return (current->flags & PF_SPREAD_PAGE) ||
> > +		sysctl_spread_file_cache;
> >  }
> 
> But this might break applications that explicitly opt out from
> spreading.

What do you mean? There's no such setting at the moment.

They can only enable it.

-Andi
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