Re: non-NUMA cache_free_alien() (was Re: [RFC] SLAB : NUMAcache_free_alien() very expensive because of virt_to_slab(objp); nodeid =slabp->nodeid;)

From: Christoph Lameter
Date: Thu Mar 22 2007 - 21:25:54 EST


On Thu, 22 Mar 2007, Siddha, Suresh B wrote:

> > You should check num_possible_nodes(), or nr_node_ids (this one is cheaper,
> > its a variable instead of a function call)
>
> But that is based on compile time option, isn't it? Perhaps I need
> to use some other mechanism to find out the platform is not NUMA capable..

No its runtime.

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