Messages in this thread | | | Date | Fri, 23 Mar 2007 15:14:07 +0100 | From | Andi Kleen <> | Subject | Re: non-NUMA cache_free_alien() (was Re: [RFC] SLAB : NUMA cache_free_alien() very expensive because of virt_to_slab(objp); nodeid = slabp->nodeid;) |
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On Thu, Mar 22, 2007 at 06:25:16PM -0700, Christoph Lameter wrote: > 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.
I don't see any code that would ever change the mask from the compile default. But that is easy to fix.
-Andi
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