On Wed, 25 Jul 2012, Jiang Liu wrote: > > There is already a N_NORMAL_MEMORY node map that contains a list of node > > that have *normal* memory usable by slab allocators etc. I think the > > cleanest solution would be to clear the corresponding node bits for your > > special movable only zones. Then you wont be needing to modify other > > subsystems anymore. > > > Hi Chris, > Thanks for your comments! I have thought about the solution mentioned, > but seems it doesn't work. We have node masks for both N_NORMAL_MEMORY and > N_HIGH_MEMORY to distinguish between normal and highmem on platforms such as x86. > But we still don't have such a mechanism to distinguish between "normal" and "movable" > memory. So for memory nodes with only movable zones, we still set N_NORMAL_MEMORY for > them. One possible solution is to add a node mask for "N_NORMAL_OR_MOVABLE_MEMORY", > but haven't tried that yet. Will have a try for that. Hmmm... Maybe add another N_LRU_MEMORY bitmask and replace those N_NORMAL_MEMORY uses with N_LRU_MEMORY as needed? Use N_NORMAL_MEMORY for subsystems that need to do regular (non LRU) allocations that are not movable? _ -- 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>