On Sat 28-03-15 10:53:22, Peter Zijlstra wrote: [...] > Alternatively the thing hocko suggests is an utter fail too. You cannot > stuff that into hardirq context, that's insane. I guess you are referring to http://article.gmane.org/gmane.linux.kernel.mm/127569, right? Why cannot we do something like refresh_cpu_vm_stats from the IRQ context? Especially the first zone stat part. The per-cpu pagesets is more costly and it would need a special treatment, alright. A simple way would be to splice the lists from the per-cpu context and then free those pages from the kthread context. I am still wondering why those two things were squashed into a single place. Why kswapd is not doing the pcp cleanup? -- Michal Hocko SUSE Labs -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>