> How about add some comment, if mirrored memroy is too small, then the > normal zone is small, so it may be oom. > The mirrored memory is at least 1/64 of whole memory, because struct > pages usually take 64 bytes per page. 1/64th is the absolute lower bound (for the page structures as you say). I expect people will need to configure 10% or more to run any real workloads. I made the memblock boot time allocator fall back to non-mirrored memory if mirrored memory ran out. What happens in the run time allocator if the non-movable zones run out of pages? Will we allocate kernel pages from movable memory? -Tony -- 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