On February 21, 2017 12:34 AM Vlastimil Babka wrote: > On 02/16/2017 09:21 AM, Hillf Danton wrote: > > Right, but the order-3 request can also come up while kswapd is active and > > gives up order-5. > > "Giving up on order-5" means it will set sc.order to 0, go to sleep (assuming > order-0 watermarks are OK) and wakeup kcompactd for order-5. There's no way how > kswapd could help an order-3 allocation at that point - it's up to kcompactd. > cpu0 cpu1 give up order-5 fall back to order-0 wake up kswapd for order-3 wake up kswapd for order-5 fall in sleep wake up kswapd for order-3 what order would we try? It is order-5 in the patch. Given the fresh new world without hike ban after napping, one tenth second or 3 minutes, we feel free IMHO to select any order and go another round of reclaiming pages. thanks Hillf -- 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>
