On Sat, Sep 14, 2013 at 10:57:35AM +0800, Bob Liu wrote: > 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. >
This is a real, but separate problem. > I think this may related with this topic, I don't know whether this > series can also fix the issue I mentioned. > This series does not aim to fix that particular problem. There will be some interactions between the problems as automatic NUMA balancing deals with THP migration but they are only indirectly related. If khugepaged does not collapse to huge pages inappropriately then automatic NUMA balancing will never encounter them. -- Mel Gorman SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
