On Tue, 2 Aug 2011, Christoph Lameter wrote: > The per cpu partial lists only add the need for more memory if other > processors have to allocate new pages because they do not have enough > partial slab pages to satisfy their needs. That can be tuned by a cap on > objects. > The netperf benchmark isn't representative of a heavy slab consuming workload, I routinely run jobs on these machines that use 20 times the amount of slab. From what I saw in the earlier posting of the per-cpu partial list patch, the min_partial value is set to half of what it was previously as a per-node partial list. Since these are 16-core, 4 node systems, that would mean that after a kmem_cache_shrink() on a cache that leaves empty slab on the partial lists that we've doubled the memory for slub's partial lists systemwide. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>