Hi Mel, On 09/10/2013 05:31 PM, Mel Gorman wrote: > It has been a long time since V6 of this series and time for an update. Much > of this is now stabilised with the most important addition being the inclusion > of Peter and Rik's work on grouping tasks that share pages together. > > This series has a number of goals. It reduces overhead of automatic balancing > through scan rate reduction and the avoidance of TLB flushes. It selects a > preferred node and moves tasks towards their memory as well as moving memory > toward their task. It handles shared pages and groups related tasks together. >
I found sometimes numa balancing will be broken after khugepaged started, because khugepaged always allocate huge page from the node of the first scanned normal page during collapsing. A simple use case is when a user run his application interleaving all nodes using "numactl --interleave=all xxxx". But after khugepaged started most pages of his application will be located to only one specific node. I have a simple patch fix this issue in thread: [PATCH 2/2] mm: thp: khugepaged: add policy for finding target node I think this may related with this topic, I don't know whether this series can also fix the issue I mentioned. -- Regards, -Bob -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
