Hello, Tang. On Thu, Jul 23, 2015 at 12:44:53PM +0800, Tang Chen wrote: > Allocating cpuid when a new cpu comes up and reusing the cpuid when it > comes up again is possible. But I'm not quite sure if it will be less > modification > because we still need an array or bit map or something to keep the mapping, > and select backup nodes for cpus on memory-less nodes when allocating > memory. > > I can post a set of patches for this idea. And then we can see which one is > better. I suspect the difference could be that in the current code the users (workqueue) can remain the same while if we do it lazily there probably needs to be a way to poke it. As long as the IDs are allocated to the online CPUs first, I think pre-allocating everything should be fine too. 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>