Christoph Lameter wrote:
> On Thu, 20 May 2010, Alexander Duyck wrote:
>
>> diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
>> index 0249d41..e6217bb 100644 --- a/include/linux/slub_def.h
>> +++ b/include/linux/slub_def.h
>> @@ -52,7 +52,7 @@ struct kmem_cache_node {
>> atomic_long_t total_objects;
>> struct list_head full;
>> #endif
>> -};
>> +} ____cacheline_internodealigned_in_smp;
>
> What does this do? Leftovers?
It aligns it to the correct size so that no two instances can occupy a shared cacheline. I put that in place to avoid any false sharing of the objects should they fit into a shared cacheline on a NUMA system.
Thanks,
Alex
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxxx For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href