Hello, Wanpeng. On Fri, Sep 06, 2013 at 04:58:11PM +0800, Wanpeng Li wrote: > What's the root reason memblock alloc from high to low? To reduce > fragmentation or ... Because low memory tends to be more precious, it's just easier to pack everything towards the top so that we don't have to worry about which zone to use for allocation and fallback logic. Thanks. -- tejun -- 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>