On Sun 24-02-19 20:34:03, Pingfan Liu wrote: > There are NUMA machines with memory-less node. At present page allocator builds the > full fallback info by build_zonelists(). But memblock allocator does not utilize > this info. And for memory-less node, memblock allocator just falls back "node 0", > without utilizing the nearest node. Unfortunately, the percpu section is allocated > by memblock, which is accessed frequently after bootup. > > This series aims to improve the performance of per cpu section on memory-less node > by feeding node's fallback info to memblock allocator on x86, like we do for page > allocator. On other archs, it requires independent effort to setup node to cpumask > map ahead. Do you have any numbers to tell us how much does this improve the situation? -- Michal Hocko SUSE Labs
