On Thu, 13 Oct 2011, Andrew Morton wrote: > > If there are no updates occurring for a while (due to increased deltas > > and/or vmstat updates) then the vm_stat cacheline should be able to stay > > in shared mode in multiple processors and the performance should increase. > > > > We could cacheline align vm_stat[]. But the thing is pretty small - we > couild put each entry in its own cacheline. Which in turn would increase the cache footprint of some key kernel functions (because they need multiple vm_stat entries) and cause eviction of other cachelines that then reduce overall system performance again. -- 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>