On Wed, Feb 14, 2024 at 12:53:55PM +0900, Byungchul Park wrote: > While running qemu with a configuration where some CPUs don't have their > local memory and with a kernel numa balancing on, the following oops has > been observed. It's because of null pointers of ->zone_pgdat of zones of > those nodes that are not initialized at booting time. So should avoid > nodes not set N_MEMORY from getting promoted. Looking at free_area_init(), we call free_area_init_node() for each node found on the system. And free_area_init_node()->free_area_init_core() inits all zones belonging to the system via zone_init_internals(). Now, I am not saying the check is wrong because we obviously do not want migrate memory to a memoryless node, but I am confused as to where we are crashing. -- Oscar Salvador SUSE Labs
